[Help][Urgent]WiFi won't turn on - Galaxy S 4 Q&A, Help & Troubleshooting

Hi there!
I'm having a really bad problem at the moment on my s4 (i9505). Recently I upgraded from stock (MDE) to pre-rooted (MF8). Since then, my WiFi has stopped working, and it seems to be the only thing that has gone wrong. When I toggle WiFi on, it immediately toggles off (both in the quick settings, and through the settings panel). When I mean immediately, I mean within 1/10 of a second.
I flashed another ROM over it (OMEGA V7) and nothing changed.
I feel as though I've missed something vital, and would rather work on a fix for it rather than flash stock through Odin and start from scratch. Any help is very much appreciated.

Check settings in WiFi. There is an option for using cell or WiFi based on which one is faster, disable it.
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c5satellite2 said:
Check settings in WiFi. There is an option for using cell or WiFi based on which one is faster, disable it.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
Thanks for the quick reply.
I already had that off (selected off by default).

Also check if your wifi timer is on.
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Also check if your wifi timer is on.
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
No WiFi timer is also off.
This is very strange, I've searched google for hours and absolutely nothing like the issue I'm having.

Flash correct kernel
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xxshabsxx said:
No WiFi timer is also off.
This is very strange, I've searched google for hours and absolutely nothing like the issue I'm having.
Click to expand...
Click to collapse
Ive had this issue before when my kernel and modem are mismatched but also when a weird setting is enabled... and I cant remember what it is.
Try a factory reset but do not restore your phone settings from google... only your contacts
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Ive had this issue before when my kernel and modem are mismatched but also when a weird setting is enabled... and I cant remember what it is.
Try a factory reset but do not restore your phone settings from google... only your contacts
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
Yeah just flashed stock through odin and did a factory reset.
Still not working. Really lost, and rather worried right now.

xxshabsxx said:
Yeah just flashed stock through odin and did a factory reset.
Still not working. Really lost, and rather worried right now.
Click to expand...
Click to collapse
So wifi will not turn on no mattrr what ?
And your not in airplane mode ?
This is beyond me then... I hope your hardware wasnt messed up.
Does your wifi still have a mac address ?
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
So wifi will not turn on no mattrr what ?
And your not in airplane mode ?
This is beyond me then... I hope your hardware wasnt messed up.
Does your wifi still have a mac address ?
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
Not in Airplane mode.
I still have a mac adress.
No idea what's wrong. I literally JUST flashed a ROM. I've been doing this for almost 3 years and never have I seen an issue like this.
Might take the phone back.

xxshabsxx said:
Not in Airplane mode.
I still have a mac adress.
No idea what's wrong. I literally JUST flashed a ROM. I've been doing this for almost 3 years and never have I seen an issue like this.
Might take the phone back.
Click to expand...
Click to collapse
Something got messed up.
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Something got messed up.
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
I can't really say why this happens but a lot of times with this phone it seems that the MAC address to the wifi is somehow lost and by removing the /data/.cid.info file you can somehow reset something that makes things work again. I assume it's somehow tight to different wifi network chip drivers in different kernels but I'm not sure. On some ROM's I have tried I have to do this on every boot...

http://forum.xda-developers.com/showthread.php?t=2357471

Related

Nexus S stops syncing on WiFi when screen is off

I can't figure this out and its driving me batty. When my phone is on wifi and the screen is off, it will stop syncing with Google.
I turn my screen on and the wifi signal is grey, then after a moment, it turns blue and I get my Google voice texts, gmail, etc.
Dies anyone have any idea?
Sent from my Nexus 7 using Tapatalk 2
Go into Wi-Fi settings/hit menu key/advanced/keep Wi-Fi on during sleep choose always.
Problem solved.
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Babydoll25 said:
Go into Wi-Fi settings/hit menu key/advanced/keep Wi-Fi on during sleep choose always.
Problem solved.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
i'll give it a go.
weird, because this seems to have only started recently
thanks!
strra said:
i'll give it a go.
weird, because this seems to have only started recently
thanks!
Click to expand...
Click to collapse
NP.
Sent from my HTC One X using Tapatalk 2
Babydoll25 said:
NP.
Sent from my HTC One X using Tapatalk 2
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Click to collapse
well, i gave it a go and ran with it all day. still no incoming gmail or google voice texts when the screen is off
even when the screen is on, the notifications are very delayed. might it be a router setting..? it does only seem to happen at home..
strra said:
well, i gave it a go and ran with it all day. still no incoming gmail or google voice texts when the screen is off
even when the screen is on, the notifications are very delayed. might it be a router setting..? it does only seem to happen at home..
Click to expand...
Click to collapse
what ROM/kernel are you running? Did you flash a kernel with updated wifi drivers and flash another (kernel) without reinstalling the ROM?
Otherwise, yes...check your router settings.
I'm sorry that changing out to wifi never sleeps, didn't fix your problem.
Sent from my HTC One X using Tapatalk 2
The stock Droid 3 ROM has a battery saving "feature" in the settings. Do you have that somewhere?
Sent from my XT883 using xda app-developers app
Babydoll25 said:
what ROM/kernel are you running? Did you flash a kernel with updated wifi drivers and flash another (kernel) without reinstalling the ROM?
Otherwise, yes...check your router settings.
I'm sorry that changing out to wifi never sleeps, didn't fix your problem.
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
I'm trying a different kernel. I'll keep you updated.
Sent from my Nexus S 4G using Tapatalk 2
strra said:
I'm trying a different kernel. I'll keep you updated.
Sent from my Nexus S 4G using Tapatalk 2
Click to expand...
Click to collapse
Make sure to read the changelog of the kernel. Some kernels include updated WiFi/Bluetooth drivers and if you switch kernels you must reflash the ROM to revert the drivers.
Sent from somewhere....if I could only remember where....

Unable to turn on bluetooth sometimes?

I haven't seen anybody create a thread about this, but has anyone not been able to enable their bluetooth without rebooting their device? I'll hit the bluetooth toggle in the settings and it just shots off right away. I'm not exactly sure what's causing it but I'm hoping that it's just a software issue since I use A2DP to listen to music.
EDIT: I performed a Factory Reset, I'll let you guys know if this problem still occurs.
FatalityBoyZahy said:
I haven't seen anybody create a thread about this, but has anyone not been able to enable their bluetooth without rebooting their device? I'll hit the bluetooth toggle in the settings and it just shots off right away. I'm not exactly sure what's causing it but I'm hoping that it's just a software issue since I use A2DP to listen to music.
Click to expand...
Click to collapse
Yeah same here, had that a while ago.. it happened after I used bluetooth for a while then switched it off, and then when I tried switching it on again after about 10-15 mins it wouldnt switch on. Had to reboot before it worked again..
Hope there's a software fix soon!
mohit1234 said:
Yeah same here, had that a while ago.. it happened after I used bluetooth for a while then switched it off, and then when I tried switching it on again after about 10-15 mins it wouldnt switch on. Had to reboot before it worked again..
Hope there's a software fix soon!
Click to expand...
Click to collapse
It's good to know that I'm not the only one.
Sent from my Nexus 4 using xda premium
Bump
This happened to me a few times with my galaxy nexus. Haven't had an issue with the N4 yet.
Sent from my Nexus 4
El Daddy said:
This happened to me a few times with my galaxy nexus. Haven't had an issue with the N4 yet.
Sent from my Nexus 4
Click to expand...
Click to collapse
Would you recommend a factory reset?
I've had this happen occasionally on my N4, have to reboot in order to enable BT again. I'm guessing a software bug to be fixed in a future update. I doubt a factory reset will cure the problem.
Had this happen yesterday. I figured it was the nfc tag getting triggered too many times in the car mount? Simple reboot fixed it though.
hfuizo said:
I've had this happen occasionally on my N4, have to reboot in order to enable BT again. I'm guessing a software bug to be fixed in a future update. I doubt a factory reset will cure the problem.
Click to expand...
Click to collapse
frigidazzi said:
Had this happen yesterday. I figured it was the nfc tag getting triggered too many times in the car mount? Simple reboot fixed it though.
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Click to collapse
I'm really hoping that this is just a software issue. I really don't want to RMA again. I actually have a Nexus 4 with a perfect screen.
Boooo
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FatalityBoyZahy said:
Boooo
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Click to collapse
I just experienced this problem as well. It was really annoying. Even toggling airplane mode wouldn't even work. On reboot, my bluetooth was already on though.
yokuyuki said:
I just experienced this problem as well. It was really annoying. Even toggling airplane mode wouldn't even work. On reboot, my bluetooth was already on though.
Click to expand...
Click to collapse
It's looking like a software problem. I wonder if people are experiencing this on CM10.
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yokuyuki said:
I just experienced this problem as well. It was really annoying. Even toggling airplane mode wouldn't even work. On reboot, my bluetooth was already on though.
Click to expand...
Click to collapse
I had this exact problem. Only happened once so far.
Edit: happened again today.
shilent said:
I had this exact problem. Only happened once so far.
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Click to collapse
It's kind of annoying when I'm all motivated for a run and then my headphones won't connect. -_-
Sent from my Nexus 4 using xda premium
Nopes !
Bluetooth works like a charm man !
This is really starting to bother me -__-
Sent from my Nexus 4 using xda premium
happens to me to. BT won't come on and need to reboot phone to fix issue.
i only use BT while driving as my music streams from the N4.
It's prob a software bug. i wonder if there's a service that we could kill that may get it to work again with rebooting.
Same here. Reboot fixes the issue for me.
Sent from my Nexus 4 using xda app-developers app
First issue with my N4 I've experienced is this - happened just now and came looking to see if I was the only one. Normally I have alogcat installed, but hadn't gotten around to it yet. Next time it happens I'll fire it up and see if there's any useful messages or not If I get any info from it I'll share it here.
Reapman said:
First issue with my N4 I've experienced is this - happened just now and came looking to see if I was the only one. Normally I have alogcat installed, but hadn't gotten around to it yet. Next time it happens I'll fire it up and see if there's any useful messages or not If I get any info from it I'll share it here.
Click to expand...
Click to collapse
Thanks man. If it doesn't turn out to be a software issue, I'm going to RMA.
Sent from my Nexus 4 using xda premium

factory reset = no netowkr or wifi

hi to anytone who is reading this.
here is how my issue started:
a week ago i rooted it
4 days ago my google play stopped working and would not steam any music( i didnt think anything off it just dragged and dropped my music onto my phone)
the next day google play store would not load and just said "no connection" and the re try button... i left it for a few hours and throught maybe its down ... the next morning i looked again and it wasnt up ... i noticed the signal bars and wifi bars was grey ... didnt know what it ment so i left it.
today, i rang gogole and they said do a factory reset... So i did.. grabbed a quick copy of all the files on there and hopped for the best.
it reset perfectly all datat wiped and everything... i tried to connect to wifi ... NO luck ... so i put my sim in and it wouldent read... restarted the phone .. still no wifi and no signal ....
what do i do?
i have the nexus 4 with a three simcard and my router is a bt home hub 3. 4.2.2 firmware
thanks in advance
luke
Start by re-flashing the factory images. If that doesn't fix it, you probably have a hardware problem.
can you please link me to a thread that explains how to do this safely???
thanks
keaza said:
can you please link me to a thread that explains how to do this safely???
thanks
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2010312
wifi/data problem is always kernel related. flash a custom kernel and that should solve it.
Sent from my Nexus 4 using xda premium
persheshhater said:
wifi/data problem is always kernel related. flash a custom kernel and that should solve it.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
That is incorrect.
Data issues can be radio related. By following my instructions he will flash both of these to stock which will help determine if the issue is hardware or software related.
Fixed it thanks to you guys. was just software so you guys are life savers!
estallings15 said:
That is incorrect.
Data issues can be radio related. By following my instructions he will flash both of these to stock which will help determine if the issue is hardware or software related.
Click to expand...
Click to collapse
idc what he does. the fact thay he also has wifi issues means radio is not a problem. it is very easy to say flash all stock. thing is to try solve the problem without fully installing the whole thing. that is why yours is not a "solution".
Sent from my Nexus 4 using xda premium
persheshhater said:
idc what he does. the fact thay he also has wifi issues means radio is not a problem. it is very easy to say flash all stock. thing is to try solve the problem without fully installing the whole thing. that is why yours is not a "solution".
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
:sigh:
Did you not read the last part of my previous post, or are you just way too happy to argue?

Wi-Fi Lost!

Out of the blue I've lost my Wi-Fi capability on my S4.
I've restarted & turned off the phone to no avail. My phone shows up on my router's control panel as active as well as a couple of apps I have.
I've also forgot the connection & reentered all necessary info. Mobile connectivity is fine but as soon as I switch Wi-Fi back on, no tweets, FB notifications, etc.
Suggestions, ideas? TX
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Are you on stock rom? Do other devices work on your wifi
jd1639 said:
Are you on stock rom?
Click to expand...
Click to collapse
Yes & I don't want to root. TX
Sent from my SAMSUNG-SGH-I337 using Tapatalk
randun said:
Yes & I don't want to root. TX
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Click to expand...
Click to collapse
I don't want you to root either. It sounds like to me that it's a hardware issue with your phone.
Well, even though my router gave all indications that it was picking up the phone I tried a hunch. Rebooted the router & Wi-Fi is back!
Sent from my SAMSUNG-SGH-I337 using Tapatalk
randun said:
Well, even though my router gave all indications that it was picking up the phone I tried a hunch. Rebooted the router & Wi-Fi is back!
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Click to expand...
Click to collapse
Glad to hear it
Me too.
Sent from my SAMSUNG-SGH-I337 using Tapatalk

Wifi and data switch off randomly.

Have noticed about once a day at random times, my wifi and data signal will disappear when using the phone. I have to switch airplane mode on and back off to get my connections back. Not a major Issue, but slightly annoying.
Anyone else have this problem or know the cause?
Sent from my SM-G900F using Tapatalk
simacca said:
Have noticed about once a day at random times, my wifi and data signal will disappear when using the phone. I have to switch airplane mode on and back off to get my connections back. Not a major Issue, but slightly annoying.
Anyone else have this problem or know the cause?
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
I'm having an issue where my wifi icon disappears but I'm still connected to wifi. Also, the toggle is grayed out. Pretty annoying. I'm on the Sprint GS5.
jhuff83 said:
I'm having an issue where my wifi icon disappears but I'm still connected to wifi. Also, the toggle is grayed out. Pretty annoying. I'm on the Sprint GS5.
Click to expand...
Click to collapse
The toggle is greyed out on mine too and cannot switch it back on. The only difference is that I loose wifi and network connection. Mine is o2 UK unbranded handset.
Update: my connections are still active when this happens.
Sent from my SM-G900F using Tapatalk
I'm getting the same thing here, the data and wifi icons occasionally disappear and the wifi toggle goes dark (as if it's not connected), but I'm still connected and get data just fine.
Do you reckon this is a hardware or software fault?
Sent from my SM-G900F using Tapatalk
simacca said:
Do you reckon this is a hardware or software fault?
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
I would think software.
Sent from my SM-G900P using Tapatalk
I have to this problem. Any fix ?
koko115 said:
I have to this problem. Any fix ?
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Click to collapse
Just as I read this comment it happened again lol. This time I did not loose connection though.
Would love to know the cause !!
Sent from my SM-G900F using Tapatalk
Think its Kitekat issue as I have it on my HTC m8 also
Sent from my HTC One_M8 using XDA Premium 4 mobile app
On my old galaxy s4 on kk i dont have this isue ?
And what samsung talk about this ?
Have now noticed that this is happening roughly the same time everyday.
Edit: update, Damn, it just happened again!!
Sent from my SM-G900F using Tapatalk
I had same problem on my G900f aften I installed an ad blocking app for non rooted Phone.
After deleting that non-working crap app.. Phone has not lost signal since.
Sent from my SM-G900F using XDA Premium 4 mobile app
joeherlev said:
I had same problem on my G900f aften I installed an ad blocking app for non rooted Phone.
After deleting that non-working crap app.. Phone has not lost signal since.
Sent from my SM-G900F using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I did install adblock (unrooted) for about 30 minutes and then removed it when I first got my phone. Not sure if the problem started before or after.
Sent from my SM-G900F using Tapatalk
Its not problem adaway. I test it.
Would be nice to find out the reason why this is happening.
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simacca said:
Would be nice to find out the reason why this is happening.
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
Is problem solved ??? Or you will have to factoory reset I think.
joeherlev said:
Is problem solved ??? Or you will have to factoory reset I think.
Click to expand...
Click to collapse
It didn't happen yesterday so will wait for next samsung update and see if that solves the problem. Unless it gets worse then I will factory reset.
update : shortly after I posted this it happened again so I tested the connection and I was still connected to wifi.
Sent from my SM-G900F using Tapatalk
simacca said:
It didn't happen yesterday so will wait for next samsung update and see if that solves the problem. Unless it gets worse then I will factory reset.
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
Okay...
Did you find any working ADBLOCKER for non-rooted G900F ?
joeherlev said:
Okay...
Did you find any working ADBLOCKER for non-rooted G900F ?
Click to expand...
Click to collapse
No, I stopped looking as I think they only work properly if your rooted.
Sent from my SM-G900F using Tapatalk
What's the best way to perform a factory reset?
Update: Just performed a full factory restore. Will let you know how I get on.
Sent from my SM-G900F using Tapatalk

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