Develop Bugs

[Q] TMO SGH-T989 wifi not working. is this h/w issue?

I bought this phone used from eBay and it worked fine for about a month.
Then the Wi-Fi stopped working. as you can see in the pictures, the wifi button (slider) is disabled/grayed out and if you go into the menu, it is stuck on "Turning wi-fi on".
I've tried everything from downgrading to 2.3.6 GB (currently on official ICS 4.0.4 through Kies) to installing Cyanogen mod ROM but it wont work. rooted then unrooted. everything else works great.
Any help would be appreciated.
I've attached screen shots to this post.
Thanks.

Did you powercycle modem and then router?
Sent from my SAMSUNG-SGH-T989 using xda premium

Spastic909 said:
Did you powercycle modem and then router?
Sent from my SAMSUNG-SGH-T989 using xda premium
Click to expand...
Click to collapse
Yup. I did. I have other devices on home wifi that have no problems connecting. In addition i have tried at starbucks and work wifi. Still no go.
The WiFi on the Galaxy S2 wont even turn on to recognize/select networks (SSIDs) to connect to. As you can see in the pics, the Wifi ON/OFF button is grayed out/disabled.

Did you try flashing a different radio since the issue started? If not I would try it, maybe downgrade the radio to UVLI1 or even try re-flashing the same radio. I know I had this issue once before but fixed it somehow, I think it was just a reboot for me but if you tried all of what you said in the OP you would have rebooted a few times.

Did you use Odin to flash back to stock? If not, give it a try with a full wipe.

Although i have not tried to mess with Radio (noob here, not sure i wont mess that up), I did Odin the phone back to stock ROM with no luck.

TheVJ said:
Although i have not tried to mess with Radio (noob here, not sure i wont mess that up), I did Odin the phone back to stock ROM with no luck.
Click to expand...
Click to collapse
When you flash a stock rom in Odin, it also flashes the radio.

Towle said:
When you flash a stock rom in Odin, it also flashes the radio.
Click to expand...
Click to collapse
Ah Ok. There you go then. and i tried with a couple of TMO stock ROMS (starting with GB 2.3.6). so obviously that hasnt worked. Thanks.

i found a possible fix, that worked for me. Go into your recovery, i did it with TWRP (latest one) and advanced and fix permissions, than i rebooted and worked! Give it a try.

gulbir101 said:
i found a possible fix, that worked for me. Go into your recovery, i did it with TWRP (latest one) and advanced and fix permissions, than i rebooted and worked! Give it a try.
Click to expand...
Click to collapse
To avoid any future hassles I contacted the seller and he agreed to take it back for a full refund, so i guess i'll never know what happened. Thanks for your help everyone.

I know this thread is nearly a year old, but I had this problem and figured out a fix that worked for me so I know its still relevant.
My fix was:
- reboot into latest cwm recovery (v6.0.4.3 touch for me)
- click "mounts and storage"
-click "unmount /cache"
-reboot
So far it has worked every time and wifi screw ups have happened rarely ever since. Hope this late post helps at least one person who was as frustrated as me!

Klenon said:
I know this thread is nearly a year old, but I had this problem and figured out a fix that worked for me so I know its still relevant.
My fix was:
- reboot into latest cwm recovery (v6.0.4.3 touch for me)
- click "mounts and storage"
-click "unmount /cache"
-reboot
So far it has worked every time and wifi screw ups have happened rarely ever since. Hope this late post helps at least one person who was as frustrated as me!
Click to expand...
Click to collapse
your wifi also stuck in turning on? i want to try this but i just want to make sure what state ur wifi is in.. because my wifi is stuck on "turning on" only.. im on stock 4.1.2 can you please post more details if you dont mind thanks!

mike1824 said:
your wifi also stuck in turning on? i want to try this but i just want to make sure what state ur wifi is in.. because my wifi is stuck on "turning on" only.. im on stock 4.1.2 can you please post more details if you dont mind thanks!
Click to expand...
Click to collapse
My WIFI is off, and if I hit turn on, it got stuck on turn on. But if I were to back out and go back in, it would be on off again.
I'm using Kitkat
After awhile all i had to do to fix it was turn airplane mode on and off. But just the other day, I was flying so had my phone in airplane mode and now that won't fix it and neither will my original fix :crying:

I have the same problem
It was working fine stopped and did everything and still not working,

4.3 Update BEWARE!

Hi, I am needing help with a troublesome issues since updating my Samsung S3 LPH-710 (sprint). I have been a long time root user and kept up with all of the updates and changes throughout the years. However, I updated and flashed my root and my phone had WIFI issues. WIFI would not event be allowed to turn on. So be it, I was able to re-flash 4.3 firmware and unroot. WIFI works fine but the phone still glitches on some issues.
I then tried to downgrade to 4.1.2. through ODIN v 1.85 and have also used v3.07 and systems and everything passes just fine. My phone reboots with 4.3. Similar, I have tried rooting 4.3 with as many different md5 being talked about in the forums that are compatible and NOTHING. I get the pass but my phone does seems to be re-looping.
I am not sure what the DEVS behind 4.3 have done but it has stumped us quite a bit; looking forward to some fixes or help on this issue in the near future.
I should have known not to upgrade and research this new update before downloading as I have been watching the back and forth complexities throughout the years.
Thanks!

It's been said 1000 times. All you had to do is open Q&A or general.
Sent from my Kit Kat* infected SIII

OceanicSaline said:
Hi, I am needing help with a troublesome issues since updating my Samsung S3 LPH-710 (sprint). I have been a long time root user and kept up with all of the updates and changes throughout the years. However, I updated and flashed my root and my phone had WIFI issues. WIFI would not event be allowed to turn on. So be it, I was able to re-flash 4.3 firmware and unroot. WIFI works fine but the phone still glitches on some issues.
I then tried to downgrade to 4.1.2. through ODIN v 1.85 and have also used v3.07 and systems and everything passes just fine. My phone reboots with 4.3. Similar, I have tried rooting 4.3 with as many different md5 being talked about in the forums that are compatible and NOTHING. I get the pass but my phone does seems to be re-looping.
I am not sure what the DEVS behind 4.3 have done but it has stumped us quite a bit; looking forward to some fixes or help on this issue in the near future.
I should have known not to upgrade and research this new update before downloading as I have been watching the back and forth complexities throughout the years.
Thanks!
Click to expand...
Click to collapse
You cant downgrade from 4.3, it will not work. Due to Knox boot loaders.

kaos420 said:
It's been said 1000 times. All you had to do is open Q&A or general.
Sent from my Kit Kat* infected SIII
Click to expand...
Click to collapse
Without a doubt, haven't been in the forums in quite some time. Learned my lesson...

mrwetwork said:
You cant downgrade from 4.3, it will not work. Due to Knox boot loaders.
Click to expand...
Click to collapse
What have these guys done? Thanks anyways!

4.3 Root
mrwetwork said:
You cant downgrade from 4.3, it will not work. Due to Knox boot loaders.
Click to expand...
Click to collapse
I was able to root using the [CF-Auto-Root] method and so far everything seems to be working fine including WIFI. I will have to re-install all of my apps and APK before finalizing my assessment.

For the WiFi issues though, it can be fixed by deleting your existing SSiD in the saved WiFi connection list then select advanced turn select WPS push button. Nowpush the WPS button on your router and wait for it to sync. This worked to all my friends who are having a problem.

Thanks! Smooth sailing, all is fine now.

[Q] Network drops sometimes

Hi all,
Although i'm new to posting to this forum, i'm reading it for about a year now, but couln't find a topic in which my problem with the Galaxy S4 mini is covered..
I got this phone for about a week now, and overall i like it al lot. I just got i rooted 1 day now because i wanted to put back some apps from my old HTC Desire, and wanted to have root acces anyway.
However i'm experiencing some network drops since i got the phone, which means that i can't call, and internet wont work. When i restart the phone (or switch on/off airplane mode) the problem is solved for a while..but it comes back again now and then..very frustrating cause i feels unreliable. This was also happening a few times before i rooted.
It's probably not due to the sim-card, because i never experienced some problem like this in my old phone with the same sim..
Does anybody know how i could solve this problem ?
Thanx a lot.

Mascarponi said:
Hi all,
Although i'm new to posting to this forum, i'm reading it for about a year now, but couln't find a topic in which my problem with the Galaxy S4 mini is covered..
I got this phone for about a week now, and overall i like it al lot. I just got i rooted 1 day now because i wanted to put back some apps from my old HTC Desire, and wanted to have root acces anyway.
However i'm experiencing some network drops since i got the phone, which means that i can't call, and internet wont work. When i restart the phone (or switch on/off airplane mode) the problem is solved for a while..but it comes back again now and then..very frustrating cause i feels unreliable. This was also happening a few times before i rooted.
It's probably not due to the sim-card, because i never experienced some problem like this in my old phone with the same sim..
Does anybody know how i could solve this problem ?
Thanx a lot.
Click to expand...
Click to collapse
You could update the baseband: I9195 is here http://forum.xda-developers.com/showthread.php?t=2545784
I'm not sure if it'll knox it up, but usually it shouldn't

Aronuser said:
You could update the baseband: I9195 is here http://forum.xda-developers.com/showthread.php?t=2545784
I'm not sure if it'll knox it up, but usually it shouldn't
Click to expand...
Click to collapse
Thanks for your reply, but when checking my phone-info it says already 'baseband version I9195XXUBNB3' which is the baseband from the topic i believe..is that the latest one?
Next to that,, I already knoxed it up, cause i flashed CWM yesterday..

I have experienced same thing, tried different official firmwares, also some unofficial tw, and cm roms, happens time to time, usually fix this by selecting my network operator again.

kodyro said:
I have experienced same thing, tried different official firmwares, also some unofficial tw, and cm roms, happens time to time, usually fix this by selecting my network operator again.
Click to expand...
Click to collapse
I read on other forums that some other users are experiencing indeed the same problem..for me it happened a couple of times a day in the beginning. Then in my 'sim-menu' app i switched from 'manual sim-selection' to 'automatic sim-selection' .. it looked like this helps a bit, but i recently experienced the network drop again, so the problem is still not gone..
You can regain network again by switching on/off, but if you're phone is in your pocket you don't know if network suddenly got lost, so i think it's a quiet unreliable phone for now..

Mascarponi said:
Thanks for your reply, but when checking my phone-info it says already 'baseband version I9195XXUBNB3' which is the baseband from the topic i believe..is that the latest one?
Next to that,, I already knoxed it up, cause i flashed CWM yesterday..
Click to expand...
Click to collapse
Thats the latest baseband, but there is another in the topic too, you could try the other one too :good:
also
if you already knoxed it up you could flash the latest firmware from www.sammobile.com and check if it does the trick (if you don't have the latest already)
---------- Post added at 11:20 PM ---------- Previous post was at 11:17 PM ----------
Mascarponi said:
I read on other forums that some other users are experiencing indeed the same problem..for me it happened a couple of times a day in the beginning. Then in my 'sim-menu' app i switched from 'manual sim-selection' to 'automatic sim-selection' .. it looked like this helps a bit, but i recently experienced the network drop again, so the problem is still not gone..
You can regain network again by switching on/off, but if you're phone is in your pocket you don't know if network suddenly got lost, so i think it's a quiet unreliable phone for now..
Click to expand...
Click to collapse
kodyro said:
I have experienced same thing, tried different official firmwares, also some unofficial tw, and cm roms, happens time to time, usually fix this by selecting my network operator again.
Click to expand...
Click to collapse
Mascarponi said:
Thanks for your reply, but when checking my phone-info it says already 'baseband version I9195XXUBNB3' which is the baseband from the topic i believe..is that the latest one?
Next to that,, I already knoxed it up, cause i flashed CWM yesterday..
Click to expand...
Click to collapse
Aronuser said:
Thats the latest baseband, but there is another in the topic too, you could try the other one too :good:
also
if you already knoxed it up you could flash the latest firmware from www.sammobile.com and check if it does the trick (if you don't have the latest already)
Click to expand...
Click to collapse
Yet another thing is:
Get the app "service mode shurtcut" https://play.google.com/store/apps/details?id=com.kabasoft.util.servicemodeshortcut&hl=de
Go into the "test" menu
and select "telephone information"
then select a different network type (not sure which, just try it)

I believe i'm already at the latest firmware..i updated OTA yesterday before i rooted my device, and i seems that i got the same build as from the latest version from the sammobile website..
I tried the ServiceMode Shortcut, but when trying to open the app it says 'not supported'
Also, when trying to change network-modus, i only can choose : GSM/ WCDMA (automatic) , GSM Only, WCDMA only...there is no 4G option , isn't that strange ?

Mascarponi said:
I believe i'm already at the latest firmware..i updated OTA yesterday before i rooted my device, and i seems that i got the same build as from the latest version from the sammobile website..
I tried the ServiceMode Shortcut, but when trying to open the app it says 'not supported'
Also, when trying to change network-modus, i only can choose : GSM/ WCDMA (automatic) , GSM Only, WCDMA only...there is no 4G option , isn't that strange ?
Click to expand...
Click to collapse
if you like you could just flash cyanogenmod and see if there is a difference!?
/edit:
then you could try accessing that menu again too :good:
---------- Post added at 11:54 PM ---------- Previous post was at 11:52 PM ----------
Mascarponi said:
I believe i'm already at the latest firmware..i updated OTA yesterday before i rooted my device, and i seems that i got the same build as from the latest version from the sammobile website..
I tried the ServiceMode Shortcut, but when trying to open the app it says 'not supported'
Also, when trying to change network-modus, i only can choose : GSM/ WCDMA (automatic) , GSM Only, WCDMA only...there is no 4G option , isn't that strange ?
Click to expand...
Click to collapse
OR
you could reflash stock, maybe there was a failure when updating?!

Aronuser said:
if you like you could just flash cyanogenmod and see if there is a difference!?
/edit:
then you could try accessing that menu again too :good:
---------- Post added at 11:54 PM ---------- Previous post was at 11:52 PM ----------
OR
you could reflash stock, maybe there was a failure when updating?!
Click to expand...
Click to collapse
I maybe will try Cyanomod...but i am not sure yet, cause i think it should work proper just out of the box..and cyanomod still got some bugs right ? I didn't quiet changed a lot on the device yet, got i for less than one week for now...also got no errors of failures when updating or so.. :S

Mascarponi said:
I maybe will try Cyanomod...but i am not sure yet, cause i think it should work proper just out of the box..and cyanomod still got some bugs right ? I didn't quiet changed a lot on the device yet, got i for less than one week for now...also got no errors of failures when updating or so.. :S
Click to expand...
Click to collapse
yeah if you flash cyanogenmod you maybe end up bricking it, but a brick can usually be solved
um... yeah it should work out of the box, maybe the hardware is damaged too!?
If you still consider flashing cyanogenmod one day and wanna stay on a fairly safe site, then use a "stable version" :good:
i'm using a nightly now, and so far it works pretty pretty fine, just 2 crashes in a app but it worked again after retrieng it
---------- Post added at 12:18 AM ---------- Previous post was at 12:17 AM ----------
Mascarponi said:
I maybe will try Cyanomod...but i am not sure yet, cause i think it should work proper just out of the box..and cyanomod still got some bugs right ? I didn't quiet changed a lot on the device yet, got i for less than one week for now...also got no errors of failures when updating or so.. :S
Click to expand...
Click to collapse
since you got the network issues since you have the phone,
it's most likely hardware demage

Today i restarted my phone cause at night battery runned low..when booted up i connects with the gsm-network, although data-connection won't start. So i CAN call phone-numbers, but can't browse the internet .. when turning on/off airplane mode it reconnects to the internet-connection again..
Aronuser said:
yeah if you flash cyanogenmod you maybe end up bricking it, but a brick can usually be solved
um... yeah it should work out of the box, maybe the hardware is damaged too!?
If you still consider flashing cyanogenmod one day and wanna stay on a fairly safe site, then use a "stable version" :good:
i'm using a nightly now, and so far it works pretty pretty fine, just 2 crashes in a app but it worked again after retrieng it
---------- Post added at 12:18 AM ---------- Previous post was at 12:17 AM ----------
since you got the network issues since you have the phone,
it's most likely hardware demage
Click to expand...
Click to collapse
You mentioned when installing CM i may end up bricking the phone..why is that ? Isn't it just as easy as flashing a new rom via CWM ?
And then, which CM rom would you suggest ? 10.2 of 11 ?

Mascarponi said:
... i'm experiencing some network drops since i got the phone, which means that i can't call, and internet wont work. When i restart the phone ... the problem is solved for a while..but it comes back again ...
Click to expand...
Click to collapse
I have this same problem with my not-rooted S4 mini [SGHi257M Rogers Canada]. I have had the phone since early December last year. The problem started recently [perhaps a month ago?]. I returned the phone for repair about a week ago. I should have it back within the next week or so. I'll post here when i get it back, especially if it comes back with any useful info.
Here is the thread where two weeks ago i posted the description of the problem ...
Odd Problem with SGHi257M
http://forum.xda-developers.com/showthread.php?t=2734738
Mick

Mascarponi said:
Today i restarted my phone cause at night battery runned low..when booted up i connects with the gsm-network, although data-connection won't start. So i CAN call phone-numbers, but can't browse the internet .. when turning on/off airplane mode it reconnects to the internet-connection again..
You mentioned when installing CM i may end up bricking the phone..why is that ? Isn't it just as easy as flashing a new rom via CWM ?
And then, which CM rom would you suggest ? 10.2 of 11 ?
Click to expand...
Click to collapse
Of course when you'll follow the steps properly it's usually work, no worries! I'd recommend CM11, it also has the newest version of android 4.4.2 :good:

del ebyanym
mdawdy said:
I have this same problem with my not-rooted S4 mini [SGHi257M Rogers Canada]. I have had the phone since early December last year. The problem started recently [perhaps a month ago?]. I returned the phone for repair about a week ago. I should have it back within the next week or so. I'll post here when i get it back, especially if it comes back with any useful info.
Here is the thread where two weeks ago i posted the description of the problem ...
Odd Problem with SGHi257M
http://forum.xda-developers.com/showthread.php?t=2734738
Click to expand...
Click to collapse
Hey Mdawdy, thanks for your information, it looks like it's indeed like the same problem !
I'm looking forward to hear if the problem still exists when you receive your phone back from repair, and what they say the problem was..
Unfortunately i'm already rooted, so i probably can't send it back to repair because I voided the warranty , or is it still possible somehow ?

Mascarponi said:
Hey Mdawdy, thanks for your information, it looks like it's indeed like the same problem !
I'm looking forward to hear if the problem still exists when you receive your phone back from repair, and what they say the problem was..
Unfortunately i'm already rooted, so i probably can't send it back to repair because I voided the warranty , or is it still possible somehow ?
Click to expand...
Click to collapse
Rooting doesn't especially mean that you've KNOX, i think it's only really warranty void if it has KNOX 0x1.
Enter Download mode to see if it has KNOX 0x1 or not (good would be 0x0)
/edit:
also if you live in the EU, i heard that even a knox'ed up device still has warranty

Aronuser said:
Rooting doesn't especially mean that you've KNOX, i think it's only really warranty void if it has KNOX 0x1.
Enter Download mode to see if it has KNOX 0x1 or not (good would be 0x0)
/edit:
also if you live in the EU, i heard that even a knox'ed up device still has warranty
Click to expand...
Click to collapse
Already checked , and i indeed knox'ed up my device, 0x1 it is, and had to remove 3 KNOX apps from system because i got messages like "attempted to access your system on your device without authorisation" ..
But i live in EU so i might be lucky if you're right..will check on that.

Got one network drop today again. When the phone-battery was emty, i started to charge, then booted the phone...in the 10 minutes after booted up, tried to send a sms but couln't be sended because phone wasn't connected to the network..
Maybe i got something to do with charging the phone at the same time .. ? Just thinking out loud...
Other question..when checking the menu for selecting 2g/3g WDCMA auto..i can't find an option for using 4G ,,however the phone says it should support this. Can only choose from3 options: GSM/WCDMA (auto) , GSM, WCDMA. Is this correct ?

Mascarponi said:
Hey Mdawdy, thanks for your information, it looks like it's indeed like the same problem !
I'm looking forward to hear if the problem still exists when you receive your phone back from repair, and what they say the problem was..
Unfortunately i'm already rooted, so i probably can't send it back to repair because I voided the warranty , or is it still possible somehow ?
Click to expand...
Click to collapse
I got my phone back today. On the report it says ...
Complaint
#1[]C56-no service
phone antenna cutting out intermittently
Symptom code C56
Work performed
[202]-Full sw upgrade & phone reset
;sw re-flashed then rebuild to factory default
Repair code 202
I'll see if it happens again or not over the next few days and report back. To me it sounds like they did nothing to the physical components of the phone, just flashed/installed/configured the various software components.
Mick

Thanks for your information !
Seems indeed they didn't do a lot you couldnt do yourself ...
What do they mean by 'sw' btw ?
I'm curious if you still get the antenna dropoups from now on..
mdawdy said:
I got my phone back today. On the report it says ...
Complaint
#1[]C56-no service
phone antenna cutting out intermittently
Symptom code C56
Work performed
[202]-Full sw upgrade & phone reset
;sw re-flashed then rebuild to factory default
Repair code 202
I'll see if it happens again or not over the next few days and report back. To me it sounds like they did nothing to the physical components of the phone, just flashed/installed/configured the various software components.
Mick
Click to expand...
Click to collapse

Mascarponi said:
..
What do they mean by 'sw' btw ?
Click to expand...
Click to collapse
sw=SoftWare :highfive:

Wifi won't turn on

Hi guys. So about 1 week ago I finally let my s4 mini I9195 Do the update its been wantng to do for a while. Turns out when the update completed and the phone was turned back on again I couldnt connect to wifi, just press the toggle and it does nothing. So ive been lurking the web for solutions and done around these:
-Taking battery out various times and in diferent situations
-http://forum.xda-developers.com/showthread.php?t=2364980 did that even though I have no idea what rooting is and such though Ive read about it 1000x , just dont get why you do that or why there are so many ways and such
- wiped cache/ returned to manufacturer settings also a few times
So, by this point I have really no idea how to fix this guys and its been a pain because I am in erasmus and could really use the wifi. I really apreciate your time for reading this thread and hope that you are able to help. Awaiting your sugestions
Thanks

What you're describing is a very typical issue: the firmware wasn't updated completely (e. g. modem not updated). Solution: flash the firmware again with Odin.
Sent from my black pearl using Tapatalk

Code:
nunein said:
What you're describing is a very typical issue: the firmware wasn't updated completely (e. g. modem not updated). Solution: flash the firmware again with Odin.
Sent from my black pearl using Tapatalk
Click to expand...
Click to collapse
Hey man, thanks for the reply. Can you give me a little more info on how to do that procedure?

Search for Odin (v3.09 or so). Check your firmware version and download it at Sammobile.com.
And use the search for further information.
Sent from my black pearl using Tapatalk

nunein said:
Search for Odin (v3.09 or so). Check your firmware version and download it at Sammobile.com.
And use the search for further information.
Sent from my black pearl using Tapatalk
Click to expand...
Click to collapse
Hey man thanks again for the reply.
I was doing this http://forum.xda-developers.com/galaxy-s4-mini/help/to-stock-firmware-choosing-problem-t2968295 but near the end it fails for some reason... any idea why?
So I tried it again and this just happened.. Kies wont even recognize.
http://imgur.com/a57W9KM

If you are already on Kitkat you need Kies 3.
Have you probably tried to flash an JB firmware?
Search at Sammobile for the latest firmware for your country and network provider and flash it with Odin.

Hi guys,
i have a similar problem. I flash many time a couple of ROM (CM11 - slimkat) but the wifi doesn't turn on and also the cellular network and the bluetooth don't work...
In the last days i had many problem with my phone because i make a mistake during the flash (on odin) of a stock rom.
Do you have any suggestion?
Thanks a lot

I had the same problem. Wi-Fi didn't work after uploading KK firmware for my country (while to my surprise KK firmware for Belgium worked ok). I tried 3 times to upload KK firmware (XEO, anr PLS) via Odin 3.09 with the same effect (no way to turn on Wi-Fi). Then I used Odin 3.06 and it worked for me (I was able to turn on Wi-Fi without any problem - strange but it had worked). So try to use older ver. of Odin first.

WIFI will not turn on

Hi guys i have a lg g3 that has been running fine on kitkat
it the received the lollipop update OTA and all went fine apart from now it wont turn the WiFi on
you can click it on and it moves to on but seems to be always trying to turn on..?? without turning on.?
any ideas..?
I have done a reset etc still no joy

Did you try to reflash? (I think that you mean by resetting that you full wiped your phone and not reflashed the rom)

KingOfDope said:
Did you try to reflash? (I think that you mean by resetting that you full wiped your phone and not reflashed the rom)
Click to expand...
Click to collapse
Yes after it updated to lollipop I lost the ability to turn on wifi..
It was there to turn on but would not it showed it trying to turn on but just hung trying to turn on..device updated from kitkat to lollipop via its own update OTA.
Cn not work it out

sas007 said:
Yes after it updated to lollipop I lost the ability to turn on wifi..
It was there to turn on but would not it showed it trying to turn on but just hung trying to turn on..device updated from kitkat to lollipop via its own update OTA.
Cn not work it out
Click to expand...
Click to collapse
Try flashing the correct modem

KingOfDope said:
Try flashing the correct modem
Click to expand...
Click to collapse
Why or how could I do that..
Device was on stock kit Kat and it updated itself to lollipop..

Sent from my LG-D855 using XDA Free mobile app
Same issue here.
I get around it by forgetting network then just signing in again. Wifi works perfectly until I leave the house and return later. Then I just do the above and viola, working wifi.
I've checked with speed test app and wifi is definitely working.
Funny thing is, if I switch off wifi then turn back on it also works.
Only when ive left home and returned later does this bug arise.

Hello guys,
This thread is a little bit old, but I am curious to know if you found a workaround for this issue.
I have the same problem as the OP (not at the second poster): since I received Stock Lollipop the WiFi won't turn on. When I try to, it says "turning on" for a while then acts like it is off.
I just bought my LG G3, NCIX the reseller, refuses to refund me or replace my phone...
I performed several factory resets and tried to flash different KK stock Roms. The weird thing is that the WiFi works with KK...
Thanks for your help.

Identical experience here.
I recently got a D855 16GB, which was on stock unbranded V10a, jumped through several OTA updates through V10g, V10j, and V10k (IIRC) all with wifi working fine before getting the lollipop upgrade OTA for V20c.
Immediately wifi will not switch on - the switch itself is on, but with the off section a lighter grey compared to the bluetooth switch.
On the wifi screen itself it says "Turning Wi-Fi on..." but after a while the switch reverts to off.
It's now had OTAs to V20e and V20h, but wifi is dead on both versions.
Note that this is stock and unrooted (never rooted) so I can't believe it's something I've done. Next trick will be to root and poke around /data/misc/wifi.

Does bluetooth work or the problem is only with the wifi? I also have the same problem, wifi, bluetooth is not working and when I check in the settings the mac adress it says "unknown".
Sent from my Onda V975m using Tapatalk

Accountability
Unfortunately this isn't a unique problem. There have been countless bad updates from multiple manufacturers. In this litigious world, I'm surprised no one has sought damages for bad updates that effect usability.

I have the same problem from yesterday. wifi and bluetooth seem to be turning on but they never turn on. i've done many factory resets but it didn't work. has someone found a solution?

^^^ Exactly the same issue. Would love a solution!
Same issue. Tried Hard and soft reset and have also updated firmware using LG Mobile Support Tool but had no success.
sazi said:
I have the same problem from yesterday. wifi and bluetooth seem to be turning on but they never turn on. i've done many factory resets but it didn't work. has someone found a solution?
Click to expand...
Click to collapse

ok, after 24h with this problem I think I got it back to working. Let me explain what have I done:
1. Mine is a dual sim model, that I bought in hong kong by the end of 2014.
2. Yesterday, I removed sim #2 (no longer needed), without removing the battery. I had a couple of messages indicating to restart the phone, blah blah. Can't remember if I finally restarted it or not.
3. This morning I saw no wifi connection in my phone, only 3G. Tried to start wifi in the quick access menu, but this kept blinking, never starting wifi. Restarting phone... nothing. turning off bluetooth... nothing.
I figured out that the problem had to be related with the SIM as this is the last thing I had done with the phone. Thus, I tried this, with success:
4. I turned off the phone, changed sim from slot #1 to slot#2 and started the phone. Wow, it worked for some minutes, then stopped, then started again. Well, a good sign.
5. Changed again sim from slot #2 to slot #1: Wifi working again. After some time it stopped working, but soon started again. Hasn't given me more problems (after only 30 min, that's true).
Hope it helps.

jimbobmcginty said:
Identical experience here.
I recently got a D855 16GB, which was on stock unbranded V10a, jumped through several OTA updates through V10g, V10j, and V10k (IIRC) all with wifi working fine before getting the lollipop upgrade OTA for V20c.
Immediately wifi will not switch on - the switch itself is on, but with the off section a lighter grey compared to the bluetooth switch.
On the wifi screen itself it says "Turning Wi-Fi on..." but after a while the switch reverts to off.
It's now had OTAs to V20e and V20h, but wifi is dead on both versions.
Note that this is stock and unrooted (never rooted) so I can't believe it's something I've done. Next trick will be to root and poke around /data/misc/wifi.
Click to expand...
Click to collapse
HELLO
I have exactly the same problem and I think we're not the only...
D855 :
-Wifi and Bluetooth doesn't work.
-Wifi keep turning on itself and the battery drain..
-3g/4g works perfectly.
-Downgraded on kk and Wi-Fi works so it is not a hardware issue
-Even on fulmics Rom Wi-Fi and Bluetooth doesn't work
HEELP ME PLEASE

Got the same problem here. I have my G3 since november 2014 and recently I rooted it to install CM 13 on it and Xposed bcs I got tired of the laggy software of LG. One morning I woke up to drink some water and saw my phone restarting a lot of time... ok I thought its a simple bootloop. Tried to install CM again, didnt fix it. Flashed stock software and still... Bought new battery and new power flex and the problem is still there. I go into download mode, installed the software with LGs support tool and got pass the bootloop, but now wifi nor bluetooth works. I thought it's the software so I dared myself again to root it and installed TWRP and CM13, but it wouldn't boot. I installed then Liquidsmooth, based on CM13, and got it to boot up, but in the configuration menu where WiFi is needed to be added it couldn't turn on. I skiped it and in the middle of the process it started again to restart. I don't know if it's a hardware based problem or software... But I would like to try everything out before I have to buy a new phone.

SoulEater45 said:
Got the same problem here. I have my G3 since november 2014 and recently I rooted it to install CM 13 on it and Xposed bcs I got tired of the laggy software of LG. One morning I woke up to drink some water and saw my phone restarting a lot of time... ok I thought its a simple bootloop. Tried to install CM again, didnt fix it. Flashed stock software and still... Bought new battery and new power flex and the problem is still there. I go into download mode, installed the software with LGs support tool and got pass the bootloop, but now wifi nor bluetooth works. I thought it's the software so I dared myself again to root it and installed TWRP and CM13, but it wouldn't boot. I installed then Liquidsmooth, based on CM13, and got it to boot up, but in the configuration menu where WiFi is needed to be added it couldn't turn on. I skiped it and in the middle of the process it started again to restart. I don't know if it's a hardware based problem or software... But I would like to try everything out before I have to buy a new phone.
Click to expand...
Click to collapse
I'm not the only one
I don't understand why it doesn't work because if you downgrade on kk versions your wifi & bluetooth will be back...

tchointeur said:
I'm not the only one
I don't understand why it doesn't work because if you downgrade on kk versions your wifi & bluetooth will be back...
Click to expand...
Click to collapse
Have you maybe tried to change the kernel of your device? I have never done that so I am scared if I would damage something.
http://forums.androidcentral.com/google-nexus-7-tablet-2013/306730-wifi-stuck-turning.html
Here someone says it's the kernel that is having problems and installing a new one and going maybe back to the old one will fix it.

SoulEater45 said:
Have you maybe tried to change the kernel of your device? I have never done that so I am scared if I would damage something.
http://forums.androidcentral.com/google-nexus-7-tablet-2013/306730-wifi-stuck-turning.html
Here someone says it's the kernel that is having problems and installing a new one and going maybe back to the old one will fix it.
Click to expand...
Click to collapse
Maybe but wich kernel do we haveto use? Even on fulmics 5.3 it doesn't work!

tchointeur said:
Maybe but wich kernel do we haveto use? Even on fulmics 5.3 it doesn't work!
Click to expand...
Click to collapse
I installed CM13 and in the setup screen I actually had wifi and I could connect to my router. It was kinda strange. But bcs I have some problems beside wifi, the reboot thing, I couldn't test out if it works too. Try flashing CM13 or ROMs that are based on it like Liquidsmooth. Maybe it will help.

SoulEater45 said:
I installed CM13 and in the setup screen I actually had wifi and I could connect to my router. It was kinda strange. But bcs I have some problems beside wifi, the reboot thing, I couldn't test out if it works too. Try flashing CM13 or ROMs that are based on it like Liquidsmooth. Maybe it will help.
Click to expand...
Click to collapse
I tried flashing other roms but twrp says "unmount of /system failed: no such volume " "script succeeded: result was (0.20000)".. when i restart it's on bootloop NO CHANCE