Screen Dimming LG 20K Plus - LG K20 Plus Questions & Answers

LG K20 Plus boots up then screen dims about every 5 seconds. Had to find an app to keep the screen on. Went to settings/display and tried various settings but non would work to keep the screen on for any designated time adjustment. Any suggestions? Also, other issue; after setting up the fingerprint security, that doesn't work Phone boots up and on screen says fingerprint not working put in your pin which does work.

There were 3 threads on the same topic. This was the most descriptive so I've kept this open.
If people aren't responding it's probably because the user base is limited and people may not have an answer. Strangely enough that does happen here, it happened with my first Android device.

sidbub said:
LG K20 Plus boots up then screen dims about every 5 seconds. Had to find an app to keep the screen on. Went to settings/display and tried various settings but non would work to keep the screen on for any designated time adjustment. Any suggestions? Also, other issue; after setting up the fingerprint security, that doesn't work Phone boots up and on screen says fingerprint not working put in your pin which does work.
Click to expand...
Click to collapse
Need more details on your device sir/madam. The more the merrier.
Upon boot password must be entered prior to allowing fingerprint unlock.
Why? It's genius actually. Imagine sleeping and someone decided to unlock your phone and snoop...
That finger is useless.
Now if it's your significant other, that password is useless.
(S)He will find a way.

Related

AT&T 4.4.2 Rooted Moto X unlocks after missed call

I cannot find a solution for this but the issue is when I miss a phone call when the phone is in my pocket, it automatically unlocks, and drains my battery.
I'm running 4.4.2 rooted on my AT&T Moto X, and I thought 4.4.2 would fix it. I do not have a screen lock
Any help is appreciated.
Thanks!
97vulcan said:
I cannot find a solution for this but the issue is when I miss a phone call when the phone is in my pocket, it automatically unlocks, and drains my battery.
I'm running 4.4.2 rooted on my AT&T Moto X, and I thought 4.4.2 would fix it. I do not have a screen lock
Any help is appreciated.
Thanks!
Click to expand...
Click to collapse
Hmm sounds like a strange issue...
You mean you don't have a screen pin/code/password, or that you don't have even the sliding unlock button?
Have a look in Settings > Display
What timeout do you have listed under sleep? The default is 30seconds, but it goes all the way up to 30min (which I would expect could definitely drain some battery...
Let us know and we may be able to help you further...
samwathegreat said:
Hmm sounds like a strange issue...
You mean you don't have a screen pin/code/password, or that you don't have even the sliding unlock button?
Have a look in Settings > Display
What timeout do you have listed under sleep? The default is 30seconds, but it goes all the way up to 30min (which I would expect could definitely drain some battery...
Let us know and we may be able to help you further...
Click to expand...
Click to collapse
I do not have a password lock on my phone, Just the active display slide to unlock the phone. When a call comes in, I get the display to answer or ignore, but if I leave it go, it will just unlock to the home screen, then after a short time, the screen will shut off.
Thanks!
97vulcan said:
I do not have a password lock on my phone, Just the active display slide to unlock the phone. When a call comes in, I get the display to answer or ignore, but if I leave it go, it will just unlock to the home screen, then after a short time, the screen will shut off.
Thanks!
Click to expand...
Click to collapse
Ok, that is definitely not normal. Are you BL unlocked, or are you using the Pie root exploit? Or Safestrap?
I would suggest flashing the entire 4.4.2 AT&T SBF file using the manual method as described in the Return to Stock thread:
DO NOT DO THIS IF YOU ARE USING SAFESTRAP
http://forum.xda-developers.com/moto-x/general/guide-moto-x-return-to-100-stock-using-t2446515
You will download the 4.4.2 AT&T SBF file from here: http://sbf.droid-developers.org/phone.php?device=0
As I seem to be telling people often, the only way to fix a corrupted filesystem (OR modifications made by previous exploits like Pwn/SlapMyMoto and MotoWpNoMo) is to flash the entire SBF file. Performing a "factory reset" cannot repair a damaged filesystem.
Often, it will fix ALL of your problems.
Good Luck
Did you install any apps, that plays with those settings after rooting?
thanks for the replies guys...I don't think so on the apps after root. IIRC, it did this before rooting the phone, so I thought it was a 4.4 issue.
it will unlock to the home page after every call, unless I answer, or ignore the call.
I'm using Xposed with these modules:
App Settings
GravityBox
HideCarrierMotoX
MinMinGuard
SoftkeysFadeMod
Twisty Switch
Xblast Tools
XPrivacy.
Again, I do not have a lock screen..when I try to enable one it does something funky with my electronic buttons, even after reboot. Not sure if it's because of SoftKeysFadeMod, or what..
I'm surprised others have not had this issue.
Thanks for you help.
97vulcan said:
I do not have a password lock on my phone, Just the active display slide to unlock the phone. When a call comes in, I get the display to answer or ignore, but if I leave it go, it will just unlock to the home screen, then after a short time, the screen will shut off.
Thanks!
Click to expand...
Click to collapse
May I ask if I understand correctly? You have no security setting, only active display enabled. If this is the case, this seems like normal behavior.
You screen turns on when you get a call, you don't answer. Until the screen time out kicks in, you see your home screen.
Once it goes dark, you should have an active display notification.
What Am i missing or what behavior are you expecting?
rtm1102 said:
May I ask if I understand correctly? You have no security setting, only active display enabled. If this is the case, this seems like normal behavior.
You screen turns on when you get a call, you don't answer. Until the screen time out kicks in, you see your home screen.
Once it goes dark, you should have an active display notification.
What Am i missing or what behavior are you expecting?
Click to expand...
Click to collapse
you pretty much hit it on the head...I was hoping the phone's display would not unlock to my desktop if I miss a call, but rather show the missed call on the active display.
I'm going to enable a security setting, and see if this changes the outcome.
Thanks
After enabling the swipe to unlock, I no longer have an issue with my phone unlocking when I miss a call. That seems to be the solution.
Thanks for your help

Lock screen won't stay set

My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
tyoder87 said:
My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
Click to expand...
Click to collapse
It actually is staying what you set it at.
Samsung as usual has set up some stupid defaults for this phone.
Go here and set it to Instantly and it will work as you expect.
Settings > Quick Settings > Lock screen and security > Secure lock settings > Secure lock time > Instantly with the power key or when the screen times out
With those settings every time you unlock your phone you will need whatever security you set.
With the default settings Samsung has it so your phone will only lock if you do not touch the phone for 10 minutes..... real secure there Samsung...
As for the fingerprint reader, when you set it up hold the phone like you would be unlocking it and use every part of the finger during the setup process.
I added both thumbs and index fingers using the tip, flats, and sides of each during the setup process.
If for some reason it does not want to read still, you can set up the same finger multiple times, do one as just the flat, one as the sides, one as the tip.
Milimbar said:
It actually is staying what you set it at.
Samsung as usual has set up some stupid defaults for this phone.
Go here and set it to Instantly and it will work as you expect.
Settings > Quick Settings > Lock screen and security > Secure lock settings > Secure lock time > Instantly with the power key or when the screen times out
With those settings every time you unlock your phone you will need whatever security you set.
With the default settings Samsung has it so your phone will only lock if you do not touch the phone for 10 minutes..... real secure there Samsung...
As for the fingerprint reader, when you set it up hold the phone like you would be unlocking it and use every part of the finger during the setup process.
I added both thumbs and index fingers using the tip, flats, and sides of each during the setup process.
If for some reason it does not want to read still, you can set up the same finger multiple times, do one as just the flat, one as the sides, one as the tip.
Click to expand...
Click to collapse
That's exactly how everything is set up on my device though. I have it set to lock immediately and did all angles of my fingers. Still won't keep the lock screen set and won't read the fingerprints. It doesn't give me a does not match message or anything. At least when that happens, I know it's trying to read my finger.
tyoder87 said:
That's exactly how everything is set up on my device though. I have it set to lock immediately and did all angles of my fingers. Still won't keep the lock screen set and won't read the fingerprints. It doesn't give me a does not match message or anything. At least when that happens, I know it's trying to read my finger.
Click to expand...
Click to collapse
In that case I do not know.
You could try a factory reset, but I do not know if that will help.
If mine did that I would be returning it for a replacement.
Also make sure settings/lock screen/secure lock/smart lock isn't set to anything that's trusted.
Smart lock leaves the phone in swipe unlock if it recognizes your phone is at your home..or hook up to your Bluetooth, etc.
tyoder87 said:
That's exactly how everything is set up on my device though. I have it set to lock immediately and did all angles of my fingers. Still won't keep the lock screen set and won't read the fingerprints. It doesn't give me a does not match message or anything. At least when that happens, I know it's trying to read my finger.
Click to expand...
Click to collapse
So after digging around some more, I found out what was happening. I have a Moto 360 paired to my phone. I had it as a trusted device and that's what was allowing me to do swipe while still having the lock screen set to something else. However, my fingerprint reader is still acting up. It's still not even trying to read my fingerprints.
tyoder87 said:
My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
Click to expand...
Click to collapse
Go to settings and search smart lock... It shows that if you ate home the screen stays unlock but if u leave anywhere it'll lock..you can turn the location off when. You get into smart lock
The same thing is happening with mine (SM-G935A AT&T). However, when I go to the secure lock settings, it keeps changing from lock instantly to the maximum setting (which shows as 34 minutes and 7 seconds). Smart Lock has been completely disabled by system administrator (I get my corporate email on my phone). Every time I go in and change the secure lock to instant, it reverts back within the next 30 minutes.
[email protected] said:
The same thing is happening with mine (SM-G935A AT&T). However, when I go to the secure lock settings, it keeps changing from lock instantly to the maximum setting (which shows as 34 minutes and 7 seconds). Smart Lock has been completely disabled by system administrator (I get my corporate email on my phone). Every time I go in and change the secure lock to instant, it reverts back within the next 30 minutes.
Click to expand...
Click to collapse
Mine is doing the same thing automatically changes to 34 min and 7 seconds secured lock time without me changing it from instantly w power key so frustrating
[email protected] said:
Mine is doing the same thing automatically changes to 34 min and 7 seconds secured lock time without me changing it from instantly w power key so frustrating
Click to expand...
Click to collapse
If you don't mind me asking, what device administrators do you have setup? Currently I have my company exchange policy, Lookout Mobile, AT&T Protect Plus and Android as registered administrators. I'm starting to wonder if its the combination of services like maybe the Protect Plus and Lookout.
[email protected] said:
If you don't mind me asking, what device administrators do you have setup? Currently I have my company exchange policy, Lookout Mobile, AT&T Protect Plus and Android as registered administrators. I'm starting to wonder if its the combination of services like maybe the Protect Plus and Lookout.
Click to expand...
Click to collapse
Hi! Lookout, email and Android device manager are all administrators I think in personal settings
[email protected] said:
Hi! Lookout, email and Android device manager are all administrators I think in personal settings
Click to expand...
Click to collapse
I figured out the issue, at least for me. First I tried to disable both Lookout and ATT Protect Plus as device administrators but still the lock setting would revert to 34 minutes and 7 seconds. In my account settings for my corporate email, there was a link for all security policies. Sure enough, the screen lock policy showed as 2047 seconds which translates to 34 minutes and 7 seconds. I cannot change the option as that is the corporate policy set by the server.
This is an issue with Samsung s7 including the edge. Mine was playing up from the day I got it. I took it into carphone warehouse assuming it was a setting and the guy serving me basically said to send it back. I eventually got a refund from Samsung (it was painful) and then I stupidly bought another one of these overpriced, over hyped pieces of **** from John Lewis instead. I've always used windows (mobile (i.e. what I'd call old android and what XDA was made for) and then windows phone and briefly windows 10 mobile. From my short experience of using the so called best android phone I have to say gimmicks aside, the features both phones share, windows destroys android, emails, documents, ease of use, fluidity, user experience....oh and a working lock screen. Not happy and it's my own fault, I fell for mass marketing and believing the hype.
I think I found the answer
tyoder87 said:
My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
Click to expand...
Click to collapse
If you have a device like a Bluetooth paired with your s7 edge, make sure that smart lock isn't on. Once I changed that that setting, it stays locked.
Can you describe how to find this page (that showed 2047 seconds)? I want to see if my company IT will change this.
Hi I have s7 edge, here's the problem is I cannot touch the screen, already do hard reset and rebooting still the screen cannot touch. I could not unlock my s7 edge.
Thanks for the help
Originally Posted by Milimbar It actually is staying what you set it at. Samsung as usual has set up some stupid defaults for this phone. Go here and set it to Instantly and it will work as you expect. Settings > Quick Settings > Lock screen and security > Secure lock settings > Secure lock time > Instantly with the power key or when the screen times out With those settings every time you unlock your phone you will need whatever security you set. With the default settings Samsung has it so your phone will only lock if you do not touch the phone for 10 minutes..... real secure there Samsung... As for the fingerprint reader, when you set it up hold the phone like you would be unlocking it and use every part of the finger during the setup process. I added both thumbs and index fingers using the tip, flats, and sides of each during the setup process. If for some reason it does not want to read still, you can set up the same finger multiple times, do one as just the flat, one as the sides, one as the tip.
From:shawnthall15
Thank you for the tip it really helped me fix the lock on my new samsung galaxy amp prime!!!!
Restart your phone
tyoder87 said:
My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
Click to expand...
Click to collapse
I made sure i made my password effective immediately (it was set to 5 seconds) after you lock your phone and it didn't work.
Then I realized that I didn't restart my phone yet.
Lock screen was effective immediately after I restarted my phone. Solved my case!
Fixed
Its quite simple, it is smart as samsung has made s7/edge to recognize you and let your phone stay unlock whenever it is around you. Once, it has been unclocked by you, you dont have to set in the passcode each time to look at your phone. But dont worry, it will revert back to lock mode once it noticed that you'v set it aside on a surface i.e leaving it. Should you want to make your phone locked at all time whenever you want it, simply change the setting as follows: Setting > Lock screen and security > Secure lock settings > Smart lock > (enter your pin) > On-body detection > set it to off. Whallaaa!! Problem solved.
---------- Post added at 06:01 AM ---------- Previous post was at 05:55 AM ----------
tyoder87 said:
My lock screen won't stay set to a unlock method. I have changed the unlock to patternpattern, pass code, and fingerprint. After a little while it goes back to just swipe. Even though, I'll go to the setting and it'll say it's still set to whatever method I have it set to. But for whatever reason the actual lock screen goes back to swipe. Also when it does work, the fingerprint reader is hit and miss. I'll have fingerprint and password or code and then the fingerprint reader won't even recognize I'm trying to use it. Anyone else having similar issues or know of a fix?
Click to expand...
Click to collapse
Its quite simple, it is smart as samsung has made s7/edge to recognize you and let your phone stay unlock whenever it is around you. Once, it has been unclocked by you, you dont have to set in the passcode each time. But dont worry, it will revert back to lock mode once it noticed that you'v set it aside on a surface i.e leaving it. Should you want to make your phone locked at all time whenever you want it, simply change the setting as follows: Setting > Lock screen and security > Secure lock settings > Smart lock > (enter your pin) > On-body detection > set it to off. Whallaaa!! Problem solved.
Go to settings/lock screen and security/other security settings/trust agents and turn off Google Smart lock option.
You are back to instant phone lock.
Cheers🖒

S7 Edge Lock Screen issue, wont unlock

I bought two Galaxy S7 Edge phones recently and have noticed this issue on both phones now. Both are also updated to the latest firmware. Both of us have fingerprints set up and a pattern backup. So far, the issue has occurred to us both twice. I happen to always use my fingerprint to unlock and she always uses pattern out of habit from a past phone. She brought it to me a couple of days ago and said her phone says to wait 60 minutes and try again. I asked how many times she entered it wrong, because of course I thought she entered it wrong. She said she didn't enter it incorrectly. I asked if she tried to reboot, of course not. Anyways, I held on to it and after 60 minutes I entered the pattern to unlock her phone and sure enough it wouldn't work. I rebooted, and tried again and it worked. OK...Weird.
The very next day, it happened on my phone. I always use my fingerprint though so it told me no match found. Say what? Tried again. Same thing. OK, swipe and tried my pattern. It says its incorrect and to try again in 30 seconds. 30 seconds later, I tried again and it locked me out for 60 seconds. This time I rebooted, and after it was done and 60 seconds had passed my pattern was working again.
I don't get why it randomly seems to not recognize that we are putting in the correct pattern or fingerprint. I am however happy that a reboot seems to resolve the issue. Is no one else experiencing this?
Mine doesn't lock instead!
So I tried couple of things. Rebooted, re-initialized Finger Prints and even pattern. Now matter what I do, it won't lock the phone. It will just unlock without asking for passcode, pattern, password or fingerprint. Only option I can think of is to restore the phone and try setting up lock option but that's pain in the a**!! I tried third party apps as to lock screen but none of them have the fingerprint unlock option! And some have ads and weird setup which worked... Gettting frustrating. Perhaps I should try restoring phone if there's no other option left
shunail said:
So I tried couple of things. Rebooted, re-initialized Finger Prints and even pattern. Now matter what I do, it won't lock the phone. It will just unlock without asking for passcode, pattern, password or fingerprint. Only option I can think of is to restore the phone and try setting up lock option but that's pain in the a**!! I tried third party apps as to lock screen but none of them have the fingerprint unlock option! And some have ads and weird setup which worked... Gettting frustrating. Perhaps I should try restoring phone if there's no other option left
Click to expand...
Click to collapse
Entirely different. I'm not sure this is actually an issue as much as it is probably settings. Go to settings, Lock screen and security, Secure lock settings. Check how long Lock automatically is set for (mine is for 5 seconds after the screen turns off automatically and that is set for 2 minutes.). Then turn on lock instantly with power key. Go to smart lock and see if that's being used. IF it is it would keep your phone unlocked when its connected via Bluetooth to a device you told it to trust, or when you are at a trusted place via google maps (such as home or work), or it could simply know your voice, or lastly if it senses that it is on your body (I don't get this one. Seems very insecure, like anyone could pick it up and it would just unlock.). Good luck!
Viper41086 said:
Entirely different. I'm not sure this is actually an issue as much as it is probably settings. Go to settings, Lock screen and security, Secure lock settings. Check how long Lock automatically is set for (mine is for 5 seconds after the screen turns off automatically and that is set for 2 minutes.). Then turn on lock instantly with power key. Go to smart lock and see if that's being used. IF it is it would keep your phone unlocked when its connected via Bluetooth to a device you told it to trust, or when you are at a trusted place via google maps (such as home or work), or it could simply know your voice, or lastly if it senses that it is on your body (I don't get this one. Seems very insecure, like anyone could pick it up and it would just unlock.). Good luck!
Click to expand...
Click to collapse
Forgot to mention, have done all of that. First I had it set Lock Automatically to immediately and tried 5 seconds, 15 seconds to all the 30 minutes, still won't lock (over night till I wok up in the morning)
Smart Lock:
Trusted Device are my car and my watch, but even with bluetooth disabled (just to give it a shot) it still doesn't lock.
Trusted Place: my home, but even with Location Service (GPS) turned off, still won't lock
On body Detection = Off
Trusted Voice = Off
Tried updating phone perhaps something may fix it, nothing.
Tried Security Policy updates and that says ... updated to latest version...
Been using Android since good old HTC Evo days and had no issue with my (last) Note 4 locking with fingerprint!! I love this phone really expect for this issue. Oh yes and another issue, gestures won't work also!!! Tried hand gestures for screenshot, nothing. Smart Stay doesn't work also!!!
Is something wrong with this phone perhaps??
shunail said:
Forgot to mention, have done all of that. First I had it set Lock Automatically to immediately and tried 5 seconds, 15 seconds to all the 30 minutes, still won't lock (over night till I wok up in the morning)
Smart Lock:
Trusted Device are my car and my watch, but even with bluetooth disabled (just to give it a shot) it still doesn't lock.
Trusted Place: my home, but even with Location Service (GPS) turned off, still won't lock
On body Detection = Off
Trusted Voice = Off
Tried updating phone perhaps something may fix it, nothing.
Tried Security Policy updates and that says ... updated to latest version...
Been using Android since good old HTC Evo days and had no issue with my (last) Note 4 locking with fingerprint!! I love this phone really expect for this issue. Oh yes and another issue, gestures won't work also!!! Tried hand gestures for screenshot, nothing. Smart Stay doesn't work also!!!
Is something wrong with this phone perhaps??
Click to expand...
Click to collapse
Hmm.. Have you tried turning off Smart lock all together? Otherwise, all I can think is to factory reset settings before you factory reset the phone.
Factory Settings Reset did it
Factory Settings Reset did it however gestures and smart stay are still issues!! Then I courage myself to do Factory Phone Reset and dang the issue with the gestures persists!!
Bump.
No one else is having this issue? I just happened to be the only one with two new phones that do it?
This literally just happened to me! I was walking to a friend's house and was using the phone just fine - was using Facebook Messenger and Spotify. All of a sudden, I try to unlock it (I have a pattern to draw, not a code) and it doesn't work. I have no idea what's going on but I don't want to factory reset and lose all my contacts and pictures. I only have four tries left to unlock it before it automatically resets itself. I've tried using the Android Device Manager to set a temporary password but since there's already a pattern to draw it won't bypass the lock screen for some reason. I never thought to check the security settings on my phone (why would I if I had a lock screen on it?) so I can't use the Samsung equivalent either. I'm extremely frustrated - been looking for help for about an hour and I'm finding absolutely nothing. It's clearly been a problem before and yet there's no solutions or explanations as to why it's happening??
While I am still having this issue sparsely, I can get around it simply by rebooting. It's just annoying to have to do so.
It's anew feature of S7 called SMART LOCK, meaning your phone knows if you're in a safe place such as your Home, your Car or if you paired a smart watch with your phone and added it as trusted device, as long as you're connected to your watch, the phone knows you're in a safe place so you dont need to enter password to your phone. Or if youre in your car or at Home, then you wont need to enter password to open your phone. But if you want to remove this feature and want to swipe or enter your pin no matter where you are then do this..go to:
SETTING>LOCK SCREEN & SECURITY>SECURE LOCK SETTING>SMART LOCK. Here you'll see "Trusted Places" and "Trusted Device" Just edit or press and hold whatever is in there, e.i your watch, your home address etc...then remove and you should be good to go.
Have you tried turning off Smart lock all together? Otherwise, all I can think is to factory reset settings before you factory reset the phone.

After Power ON, MUST use Knock Code first instead of fingerprint?

Anyone else seeing this behavior? On my 995, whenever I restart, or power on my phone.. I have to use the Knock Code to get into my phone, and it says "fingerprints unavailable for use" or something to that effect.
I find this odd behavior.
Its not odd behavior its LG behavior.
Unfortunately there's no way around it.
turn off secure startup in security...
Your fingerprint is encrypted and you phone can't access encrypted data until you unlock it after a reboot. So its kinda a catch 22 where you will always have to unlock with a pin after startup instead of fingerprint. Your fingerprint is biometric data and obviously can't be changed so it needs to more secure on your phone than your pin which you can change. It is this way on most phones with fingerprint readers.
Double0EK said:
Its not odd behavior its LG behavior.
Unfortunately there's no way around it.
Click to expand...
Click to collapse
It's not just LG, my Samsung S7 and Note 7 both required pin code on first log in after a reboot/boot up
It's part of Android now.
nest75068 said:
It's not just LG, my Samsung S7 and Note 7 both required pin code on first log in after a reboot/boot up
It's part of Android now.
Click to expand...
Click to collapse
It's not even Android. My work phone is an iPhone and it has the same behavior. Which drives me nuts because our work phones require us to change pin codes every couple of months and we can't recycle codes.
I turned off secure startup as I don't need kids messing with my phone and I imagine after ten attempts if wipes it?
reaverclan said:
I turned off secure startup as I don't need kids messing with my phone and I imagine after ten attempts if wipes it?
Click to expand...
Click to collapse
30 attempts for secure boot
If I'm right, the op is taking about setting the fingerprint to unlock but it still requires the pattern. You will notice this if you use a third party app or launcher to lock screen. E.g. Nova launcher double tap to lock screen. It will tell you fingerprint is unavailable.
A work around to this is to doubly tap the top part of the screen (the bar where the date and signal strength is).
This will allow you to unlock with fingerprint.
If you use the stock lg launcher then double tapping anywhere on screen shows you to unlock using fingerprint.
koppee1 said:
If I'm right, the op is taking about setting the fingerprint to unlock but it still requires the pattern. You will notice this if you use a third party app or launcher to lock screen. E.g. Nova launcher double tap to lock screen. It will tell you fingerprint is unavailable.
A work around to this is to doubly tap the top part of the screen (the bar where the date and signal strength is).
This will allow you to unlock with fingerprint.
If you use the stock lg launcher then double tapping anywhere on screen shows you to unlock using fingerprint.
Click to expand...
Click to collapse
I'm working with a developer of Screen Lock Pro to try and find a workaround for this. Currently his app will work on Android 5 and 6 by delaying the lock for 5-10 seconds but it's currently not working on Android 7 on LG (it is working on Pixel and Nexus devices).
Hmmm... Not sure I understand this behavior. My fingerprint is much more complex than a 4-digit code that can eventually be brute-forced (phone wipe or not - in theory I mean).. so why wouldn't my fingerprint be the top-most factor in unlocking the phone? I mean.. say I'm one of those guys that uses his last four of an SSN like an idiot, and someone knows that about me.. boom, they're in my phone. Do iPhones do this for real (as stated above)?
CHH2 said:
It's not even Android. My work phone is an iPhone and it has the same behavior. Which drives me nuts because our work phones require us to change pin codes every couple of months and we can't recycle codes.
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Click to collapse
Interesting. I wonder what type of MDM Solution your company is running...
dbornack said:
Hmmm... Not sure I understand this behavior. My fingerprint is much more complex than a 4-digit code that can eventually be brute-forced (phone wipe or not - in theory I mean).. so why wouldn't my fingerprint be the top-most factor in unlocking the phone? I mean.. say I'm one of those guys that uses his last four of an SSN like an idiot, and someone knows that about me.. boom, they're in my phone. Do iPhones do this for real (as stated above)?
Click to expand...
Click to collapse
Yup, every time I restart my iPhone, it asks for my pin number and the finger print reader is inoperable. Even when I don't restart my iPhone for a while, it will occasionally lock out the reader and require a pin to wake.
rudbwoy said:
Interesting. I wonder what type of MDM Solution your company is running...
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Click to collapse
Had to figure out where in the menus to dig through to find out who it is. (I seriously do not like how Apple sets their phones up.) Looks like it is AWMDM.
CHH2 said:
Had to figure out where in the menus to dig through to find out who it is. (I seriously do not like how Apple sets their phones up.) Looks like it is AWMDM.
Click to expand...
Click to collapse
Airwatch, by VMware. MDM....aka you're being watched...
rudbwoy said:
Airwatch, by VMware. MDM....aka you're being watched...
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Click to collapse
I always assume as much. Not really a bother for me. The iPhone is a work phone that I don't like carrying or touching. My personal phone is always my go to for anything unless it is work related.
I have this on my nexus 6p also. When ever i reboot the phone it requires me to use my pattern to unlock. It's a "feature" of sorts. Not going to go into my thoughts as to why but i think i may understand why they did that.
In case anyone is wondering, a few conditions that force you to use backup method are being left alone (with no smart locks enabled or active) for 4 hours, a reboot, and a failed scan 5 times in a row.
The reboot case is due to encrypted data (no matter what you do, your phone is encrypted on boot, unless you fix that, however, you phone will still treat it as such). The only reason I can imagine for the time out is in case a ninja chops off your fingers in your sleep. As for the wrong input, that seems annoying sure, but odds are if you got the fingerprint wrong 5 times in a row, it's not you.
Yeah v10 does this as well on fresh boot ups.
I'm not sure I understand the reason behind it I would think it would be less secure this way.
Sent from my LG-H901 using XDA-Developers mobile app
Vuciz said:
In case anyone is wondering, a few conditions that force you to use backup method are being left alone (with no smart locks enabled or active) for 4 hours, a reboot, and a failed scan 5 times in a row.
The reboot case is due to encrypted data (no matter what you do, your phone is encrypted on boot, unless you fix that, however, you phone will still treat it as such). The only reason I can imagine for the time out is in case a ninja chops off your fingers in your sleep. As for the wrong input, that seems annoying sure, but odds are if you got the fingerprint wrong 5 times in a row, it's not you.
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Click to collapse
I'm not sure I'm following as to why encryption matters. Are you saying my fingerprint data is encrypted? If so, why isn't my PIN also encrypted?
Speaking of fingerprints has anyone run into the issue where the phone "forgets" your print? I have had this happen at random times and while the fingerprint data is still saved the phone fails to recognize my finger so I have to set it up again.
Sent from my LG-H901 using XDA-Developers mobile app

Smart Lock not working and other lock screen anomalies

I own the Verizon variant of the V20. I'm coming from a rooted Samsung Galaxy S5 in which I used Tasker to do a lot of things that are now (allegedly) handled natively in the V20. I've been experimenting with and researching Smart Lock and have had no success.
Thanks to Tasker, I'm used to NOT having to unlock my phone, as long as I'm connected to my WiFi, and having it automatically lock as soon as I'm out of range of my home WiFi. Smart Lock looked like it was going to be a decent replacement for this, as it could be configured based on your location, facial recognition, connection to a trusted device, etc.
However, I'm finding that Smart Lock does not work. At all. None of the options will unlock the phone. I'd continue to use my Tasker tasks and call it a day, but unfortunately, in order to unlock the phone, Secure Settings requires root in order to accomplish this.
I want my phone to be secure as I would someday like to start using Android Pay (not activated at this time). However, I don't want to have to type in my PIN when I'm at home. So, for now, as far as security goes, it's pretty much all or nothing.
I've tried various substitute apps from the Play Store that look at WiFi to unlock the phone, but they don't work, either.
Has anyone else run into this? Were you able to overcome it? If so, how did you do it?
Another oddity I noticed is that no matter what locking method I use to lock my V20, when I unlock the device, I must first swipe the screen before it will bring me to the unlock method I selected. This is my first LG phone. Is this typical behavior for these devices?
Smartlock works for me. I have the Sprint version. When I connect to my home wifi I do have to enter my password once. After that, I only have to enter the password after 4 hours of inactivity.
TVThemeGuy said:
I own the Verizon variant of the V20. I'm coming from a rooted Samsung Galaxy S5 in which I used Tasker to do a lot of things that are now (allegedly) handled natively in the V20. I've been experimenting with and researching Smart Lock and have had no success.
Thanks to Tasker, I'm used to NOT having to unlock my phone, as long as I'm connected to my WiFi, and having it automatically lock as soon as I'm out of range of my home WiFi. Smart Lock looked like it was going to be a decent replacement for this, as it could be configured based on your location, facial recognition, connection to a trusted device, etc.
However, I'm finding that Smart Lock does not work. At all. None of the options will unlock the phone. I'd continue to use my Tasker tasks and call it a day, but unfortunately, in order to unlock the phone, Secure Settings requires root in order to accomplish this.
I want my phone to be secure as I would someday like to start using Android Pay (not activated at this time). However, I don't want to have to type in my PIN when I'm at home. So, for now, as far as security goes, it's pretty much all or nothing.
I've tried various substitute apps from the Play Store that look at WiFi to unlock the phone, but they don't work, either.
Has anyone else run into this? Were you able to overcome it? If so, how did you do it?
Another oddity I noticed is that no matter what locking method I use to lock my V20, when I unlock the device, I must first swipe the screen before it will bring me to the unlock method I selected. This is my first LG phone. Is this typical behavior for these devices?
Click to expand...
Click to collapse
I have the Verizon variant as well, they disabled most of the smart lock features that you are looking for. It works for me because I have it set to unlock when connected to my smart watch. But it is still aggravating they Verizon does this stuff.
Sent from my VS995 using XDA Labs
Thanks for the responses, guys! Looks like I've been able to get it working... to a point. I have Nova Launcher installed and have defined the double tap gesture to turn off the screen. Discovered that on my LG V20 with Nougat, this doesn't just turn off the screen. It locks it. If I turn off the screen using the power button, it works as it should.
This does not happen on my wife's LG V10 with Lollipop. On that device, the same software and gesture will turn off the screen, but it won't lock it.
In either case, one must still swipe to unlock the display, regardless of whether or not it's locked. Research indicates this is something Google implemented with version 5 of Android (until very recently, I was using 4.4).
So I've written to the developer of Nova Launcher to ask what, if anything, can be done. I'll post the results here when I have them.
TVThemeGuy said:
Thanks for the responses, guys! Looks like I've been able to get it working... to a point. I have Nova Launcher installed and have defined the double tap gesture to turn off the screen. Discovered that on my LG V20 with Nougat, this doesn't just turn off the screen. It locks it. If I turn off the screen using the power button, it works as it should.
This does not happen on my wife's LG V10 with Lollipop. On that device, the same software and gesture will turn off the screen, but it won't lock it.
In either case, one must still swipe to unlock the display, regardless of whether or not it's locked. Research indicates this is something Google implemented with version 5 of Android (until very recently, I was using 4.4).
So I've written to the developer of Nova Launcher to ask what, if anything, can be done. I'll post the results here when I have them.
Click to expand...
Click to collapse
Yes, I too grace to double tap to turn the screen on them swipe to unlock.
Sent from my LG-LS997 using XDA-Developers mobile app
I heard from the developer of Nova Launcher. Here's what he had to say:
...
Unfortunately this is a known issue in which there is a pop-up window within Nova that tells you about this and that there is a work around if you are rooted. Unfortunately there's no native work around if you're not rooted, however, you can go to the Google Play Store and purchase Screen Lock Pro (this app is not ours) and you can use it as a work around for this issue as well. ​
If you join the beta program, then follow these steps.
To get Screen Lock to appear in Nova Settings perform the following steps.
1) Have a device with a fingerprint scanner.
2) Set your security to use a PIN to unlock your device.
3) Set Double Tap gesture to Screen Lock.
4) Double Tap to turn off the device.
5) A popup window will appear asking you to choose one of two options.
6) Screen Lock should then show up within Nova Settings after that.​
...
I opted to purchase Screen Lock Pro and configure Nova Launcher to launch the shortcut for that app when the screen is double-tapped.
All in all, this method works. There just one caveat: When you double tap and the shortcut is launched, your screen AND the second screen will both go blank for about 30 seconds (not that although there's no picture, the backlight remains on during this time). After that time, the second screen will come back. If you need to unlock your device prior to that, it will be necessary for you to press the power button twice. The first time locks the screen (evidently because Screen Lock Pro only darkens your screen for the first 30 seconds, and THEN locks it), the second time will turn the screen back on. Pressing once will display your second screen. There does not seem to be an adjustment to shorten this time interval.
Also, it's important to turn on Smart Lock and Fingerprint Sensor in the settings of Screen Lock Pro.
I've been using this as described and I can live with it.
All this being said, I'm going to request a feature enhancement from the developer of Screen Lock Pro to see if we can get that interval to be adjustable.
Oh, and I'm using my fingerprint for security, and I've found that unlocking the phone with my fingerprint means I don't have to swipe after unlocking. After several days, I've gotten used to this method and it works well for me, even away from home.
I hope this helps.

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