Can't unlock bootloader - Samsung Galaxy A40 Questions & Answers

Hi,
I have trouble unlocking my A40. It's 2nd piece I own and the problem is the same.
When I follow the steps from this forum;
Go to Developer Settings and enable "OEM Unlock" option
Power off the device and boot in download mode
In download mode, you will see the long press and volume up option to unlock the bootloader
Unlock the bootloader. That will wipe your device so be sure you made a backup of your data
After bootloader unlock, boot up the phone and make sure it is connected to the internet or it will trigger rmm prenormal
Setup the phone without google account and others
Reboot in download mode and flash the recovery and vbmeta images
Boot to TWRP
Format data in TWRP
Flash the Multidisabler zip
Now you can reboot
Click to expand...
Click to collapse
I'm stuck at the 3rd point.
I don't see ANY instruction about Volume UP + Power in download mode. Nor FASTBOOT see my device to run actions with it.
What I see is only "Volume down key + power key for more than 7 secs Cancel (restart phone).
And holding Vol UP + Power doesn't do anything.
How to make this work?
Thanks.

sjiamnocna said:
Hi,
I have trouble unlocking my A40. It's 2nd piece I own and the problem is the same.
When I follow the steps from this forum;
I'm stuck at the 3rd point.
I don't see ANY instruction about Volume UP + Power in download mode. Nor FASTBOOT see my device to run actions with it.
What I see is only "Volume down key + power key for more than 7 secs Cancel (restart phone).
And holding Vol UP + Power doesn't do anything.
How to make this work?
Thanks.
Click to expand...
Click to collapse
You did enable OEM Unlock, correct?
Turn the device completely off, without any cables connected. Keep a USB cable ready that's plugged into your PC.
With the device powered off, hold both Volume buttons, and plug in the USB cable connected to your PC. Do not press Power. You should see a prompt on either a green or blue screen; select the option for Device Unlock Mode.

Finally.
Thank you for making me try for another time

Related

[Q] I can enable usb debugging!

Hi, i have brick my Nexus 4, is a softbrick. i tried alot of different method to save it, but most of the method need to enable usb debugging, but i cant even load in to screen, how to enable usb debugging???? any ideas guys?
Turn off your phone, then press VOL Down + power. Phone will boot into fastboot mode. From there you can either flash whatever you want or enter stock recovery by browsing the fastboot menu with the volume keys and selecting an option with the power button.
fabrizziop said:
Turn off your phone, then press VOL Down + power. Phone will boot into fastboot mode. From there you can either flash whatever you want or enter stock recovery by browsing the fastboot menu with the volume keys and selecting an option with the power button.
Click to expand...
Click to collapse
thx for you reply
but unfortunately, i have nothing in my sd card...

how to factory reset a pattern locked phone

Hi. yesterday i bought a redmi 3s... i have put a pattern which i forgot and also a fingerprint unlock... the fingerprint unlock was working, until i tried other fingers to see if it could be fooled... obviously after too many tries, the fingerprint unlock won't unlock the phone without the unlock pattern... is there a way to hard reset such a phone ore delete user settings... i tried volume up + power button to acess the recovery menu, but when i acess it i get a weird menu saying:
your device has loaded a different operating system
for more info visit g.co/placeholder
if no key is pressed:
your device will boot in 5 seconds
if i press volume up or down, i get this menu:
power off
restart
recovery
fastboot
back to previous page
recovery and back to previous page return to the same screen mentioned above....
please help! :crying:
also, when i connect my phone in any mode to my computer via usb cable (download mode, fastboot mode, normal mode) i hear the usb connect sound but no folders open. I'd like to get to pictures made in the last 24 hours (thats the only thing you can acess without the pattern unlock on the side swipe menu).
You can still use the usb when boot using fastboot, just move to another port of usb in your PC/Laptop etc, for unlocking pattern :
Try this
http://en.miui.com/thread-21391-1-1.html
Now you dont even need to wipe your data again
same problem with me. but i have also a problem that is the redmi 3s prime smartphone is not fast boot.
when i swithch off the phone and after that i press switch on key and with volume key then i found recovery download fastboot like some options.
i click on fastboot.
after that fastboot process is running but not completed
what should i do for stop this processing
pulkit bansal said:
same problem with me. but i have also a problem that is the redmi 3s prime smartphone is not fast boot.
when i swithch off the phone and after that i press switch on key and with volume key then i found recovery download fastboot like some options.
i click on fastboot.
after that fastboot process is running but not completed
what should i do for stop this processing
Click to expand...
Click to collapse
Press and release power button few times. Phone will restart.

Fastboot, eRecovery, Recovery & Upgrade Mode

Mobile phone shutdown, you can enter the Fastboot , eRecovery, Recovery & Upgrade these modes:
Need to connect the computer:
Fastboot mode: long press the volume down key + power button.
eRecovery mode: long press the volume up key + power button.
Do not need to connect the computer:
Recovery mode: long press the volume up key + power button.
Upgrade mode: long press the volume up key + volume down key + power button.
When the phone is in these modes, long press the power button can restart the phone to exit the mode.
Did I help you? A ''thanks :good:'' would be highly appreciated
Problem in entering recover mode
Hi,
Thank you for this article, currently I can not enter recover mode I have unplugged the cable my device is not connected to my PC so I did press the volume up + power and i got the following message :
Your device has been unlocked and can't be trusted ......... your device is booting now...
and my device will keep the message till the phone turned off!
any idea .. please help .. appreciate your effort .
thank you
Alaa.Hussien said:
Hi,
Thank you for this article, currently I can not enter recover mode I have unplugged the cable my device is not connected to my PC so I did press the volume up + power and i got the following message :
Your device has been unlocked and can't be trusted ......... your device is booting now...
and my device will keep the message till the phone turned off!
any idea .. please help .. appreciate your effort .
thank you
Click to expand...
Click to collapse
Same here. What to do?
Alaa.Hussien said:
Hi,
Thank you for this article, currently I can not enter recover mode I have unplugged the cable my device is not connected to my PC so I did press the volume up + power and i got the following message :
Your device has been unlocked and can't be trusted ......... your device is booting now...
and my device will keep the message till the phone turned off!
any idea .. please help .. appreciate your effort .
thank you
Click to expand...
Click to collapse
As soon as the Huawei logo appears release the power key and continue to hold the volume up key until recovery loads. That seems to work for me. Make sure you press the 2 keys at the same time to start.
Do you have stock recovery? or TWRP? and is you phone rooted?
IF you have a rooted phone you can install 'Flashify' or 'TWRP Manager' or 'ROM Toolbox' to boot direct to recovery while phone is on.
Finefeather said:
As soon as the Huawei logo appears release the power key and continue to hold the volume up key until recovery loads. That seems to work for me. Make sure you press the 2 keys at the same time to start.
Do you have stock recovery? or TWRP? and is you phone rooted?
IF you have a rooted phone you can install 'Flashify' or 'TWRP Manager' or 'ROM Toolbox' to boot direct to recovery while phone is on.
Click to expand...
Click to collapse
With the volume up, it says:
"Your device has been unlocked and can't be trusted....."
Your device is booting now...
And then nothing.
Can't boot. Can only access fastboot.
Reflash your recovery in fastboot.

Im lost

was trying to root my lg stylo 2 Walmart family mobile(t-mobile) and i unlocked the bootloader and installed twrp but it just says no command when i boot into recovery.
Then you didn't flash the recovery properly, it's fairly simple. If you're able to get fastboot (shut off the phone totally, hold Volume Down and plug in the USB cable attached to a computer, it should go into fastboot mode almost instantly, if not then there's an issue someplace).
After that using fastboot with the recovery img file for TWRP:
Code:
fastboot flash recovery (recovery_file).img
Wait, if it says flashing successful then before you do anything else, type the following:
Code:
fastboot reboot (but do NOT press Enter yet)
Get the phone in your hand, still connected to the USB cable, and get your fingers on the Volume Down + Power button but don't put them just yet. Carefully tap the Enter key with a pinky or something to trigger the device reboot, press and hold Volume Down + Power till you see the LG logo, let Power go for a split second (still holding Volume Down) then press Power again and hold it till TWRP loads.
If that doesn't work - and I've done that hundreds of times - there's something going on with your device, perhaps the bootloader isn't truly unlocked - that checkbox in Developer Options doesn't mean it's unlocked, it just means it can be.
Ensure you followed this: https://docs.google.com/document/d/1xRfGs-w2R_54IB8cVtIj3FTmm5GY0W1Yv4SqDhVHZ-Q/edit?usp=sharing
there's a video tutorial floating around here somwhere

[GUIDE] Booting your OnePlus X with a broken power button

Got a broken power button and need to turn on your OnePlus X?
As long as one of your volume buttons and your microUSB port still work, you're lucky.
If the volume down button is working:
1. Press and hold the volume down button.
2. Connect to a USB power source.
3. The phone should vibrate and boot into the recovery. You can release the volume button at that point.
4. If you have the stock OnePlus recovery installed just tap "English", "Exit" (if present), then "Reboot".
5. Your phone should now boot up!
If only the volume up button is working, things get a bit tricky.
Before you start, read through all of the steps and the paragraph below to make sure this goes as smooth as possible.
1. Connect your device to a USB power source without pressing any button.
2. Wait for about half a second, then press and hold the volume up button.
3. If you've hit the right moment, your device will boot to fastboot mode.
4. Connect to a PC and run the command "fastboot reboot".
(If you don't know what fastboot is or you haven't set it up yet you should be able to find plenty of guides online.)
A word of caution on finding the right moment to hit the volume button:
Start with longer delays and work from there. If you hit the volume up button too early the phone will enter EDL mode, which can be hard or annoying to get out of. EDL is Qualcomm's low-level Emergency Download Mode which allows flashing the device.
When entering EDL mode the phone won't vibrate and the screen will stay off. The phone remains in EDL mode after disconnecting the USB plug.
Normally you could press and hold the power button until a hard reset to get out of there, but in this case you have the following options:
- Unplug the battery to power down the device completely if your device happens to be open.
- Wait? For as long as it takes for your device to reset from this mode on its own or for the battery to run out. idk, good luck.
- Use an EDL mode flashing tool on a PC to send the power reset command to your device. This could be viable if you have already used such a tool before, e.g. by following the "Mega UnBrick Guide" by Naman Bhalla. Alternatively you could dive into this cross platform command-line tool, which works on WIndows, Linux and macOS. Using this approach is a bit overkill and quite the tangent from what you're actually trying to do, but being able to make use of EDL can come in handy in other situations as well when you're tinkering with your Android device so taking that detour might just be worth the time.
Awesome, it worked for me.
-Incase you have entered into EDL mode, then continue charging your mobile, it will be back to old state after sometime (12 hours maybe).
- To get fastboot mode, first insert power cable then wait for vibration/ screen light illumination after that press volume up button. if you press volume up button before inserting power cable, then it will go to EDL mode, so be careful about it.

Categories

Resources