Develop Bugs

[Q] Wifi issues stuck on turning on

i unlocked the bootloader and flashed 5.1 initially (it got some wifi connection problems) so flashed cm12 which makes my wifi to stuck at "Turning wifi on"
now to make things straight i went back to my stock version 4.4.4 which still doesn't fix my problem
some one please help me......................:crying::crying::crying::crying::crying::crying:

wait until Official Lollipop 5.1 comes out, I heard it fixed many wifi issues.

himasagar said:
i unlocked the bootloader and flashed 5.1 initially (it got some wifi connection problems) so flashed cm12 which makes my wifi to stuck at "Turning wifi on"
now to make things straight i went back to my stock version 4.4.4 which still doesn't fix my problem
some one please help me......................:crying::crying::crying::crying::crying::crying:
Click to expand...
Click to collapse
i also faced wifi keep ON issue in stock ROM, but i restarted few times and It worked fine then... or you can try the MTK/Android settings by typing like some *#*#1234#*#* to access wifi and try on/off if any
--Please hit thanks if Helped:good:

[Q] OTA Weirdness - Tab Pro 10.1

Got a notice of an OTA last night. Figured it was for Lollipop so told it to proceed. Once the tablet rebooted the WiFi radio was disabled. Looked in settings which showed that WiFi was on, but no radio. Went online an saw that Samsung hasn't sent out the Lollipop update for the 10.1.
Question 1 - how do I restore my tablet since I can't get WiFi turned on?
Question 2 - where did this weird OTA come from?
Thanks for any help you can give.
Mike

mikethevol said:
Got a notice of an OTA last night. Figured it was for Lollipop so told it to proceed. Once the tablet rebooted the WiFi radio was disabled. Looked in settings which showed that WiFi was on, but no radio. Went online an saw that Samsung hasn't sent out the Lollipop update for the 10.1.
Question 1 - how do I restore my tablet since I can't get WiFi turned on?
Question 2 - where did this weird OTA come from?
Thanks for any help you can give.
Mike
Click to expand...
Click to collapse
Firmware for SM-T520 http://www.sammobile.com/firmwares/database/SM-T520/ select your country and download.
Instructions
Extract (unzip) the firmware file
Download Odin v3.10.6
Extract Odin ZIP file
Open Odin v.3.10.6
Reboot Phone in Download Mode (press and hold Home + Power + Volume Down buttons)
Connect phone and wait until you get a blue sign in Odin
Add the firmware file to AP / PDA
Make sure re-partition is NOT ticked
Click the start button, sit back and wait few minutes

Others having same issue
Thought I'd post this as info. Checked over at Android Central and several people appear to be having the same issue. Looks like bad firmware from Samsung. Bad build number is: KOT49H.T520UEUAOD1. Wiping and factory refresh may help temporarily, but eventually the wifi radio will be disabled. I'm going to wait for Samsung to get their act together and flash a fresh build when it's released.
Thanks for the help.
Mike

My 10.1 Tab Pro was updated too but wifi is working fine. I'm not rooted though. Same build number that you mentioned.
Sent from my SM-T520 using XDA Premium HD app

Wifi Issue as well
I had the same update come across last night and now I can't connect to wi-fi to save my life. Really pissed off. Done 2 factory resets already, reset my modem at home, turns out it happens everywhere and not just at home. Wifi says it's on but doesn't pick up any networks in my area and won't connect to the 1 that is already known on my tab. PLEASE HELP

Got the update last week. Wifi is fine but now daily I get a random reboot. Never had any problems before. Thanks Sammy!

Bad Firmware
mikethevol said:
Thought I'd post this as info. Checked over at Android Central and several people appear to be having the same issue. Looks like bad firmware from Samsung. Bad build number is: KOT49H.T520UEUAOD1. Wiping and factory refresh may help temporarily, but eventually the wifi radio will be disabled. I'm going to wait for Samsung to get their act together and flash a fresh build when it's released.
Thanks for the help.
Mike
Click to expand...
Click to collapse
I have the same issue with the build described.
Does one know how to correct this firmware update if the tablet is unable to connect to the internet?

AndroidSMT520 said:
I have the same issue with the build described.
Does one know how to correct this firmware update if the tablet is unable to connect to the internet?
Click to expand...
Click to collapse
You can download an earlier firmware from sammobile.com. If you are in the US, use the firmware for cellular South and make sure it's a 4.4.2 that you are downloading. After you download it, you can flash it with Odin. There are several threads here on xda that describe this process. If you still need further help, post again.

TabPro 10.1 SM-T520, v4.4.2 Build KOT49H.T520UEUAOD1 No wifi after update
Boy am I glad to find you guys with the same problem as I have. Couple of days ago I saw an update message and decited to go for it. Well, as all of you know, wifi stops working. Factory resets gets it working again but once everything is restored it stops working again! This is quite frustrating and I hope Samsung is working on a fix right now. I haven't been on XDA for a while and only rooted phones before. So how is the rooting/mod scene for tablets. Any good Custom Roms out there we can use until/when this is resolved? I'm good with directions and done some custom roms on my phones before. Let me know what's the good ROMS out there are...the bloatfree version is a welcome even without KNOX, I don't really use it.

k8108 said:
You can download an earlier firmware from sammobile.com. If you are in the US, use the firmware for cellular South and make sure it's a 4.4.2 that you are downloading. After you download it, you can flash it with Odin. There are several threads here on xda that describe this process. If you still need further help, post again.
Click to expand...
Click to collapse
Thanks for your feedback.
I had to use the firmware from November 2014 to get it to work and restore my wi-fi.
Again thanks

KOT49H.T520UEUAOD1 is the problem
Well I figure this particular firmware has a problem. Because even after factory reset, wifi works once and goes back to not working. So the best solution is to get an earlier version. I went back to Sep 15, 2014 version and it works well. Took forever to download from sammobile though. So if you need to flash to a previous version that works. I have post a link to the firmware I have on my OneDrive that got it working again, hopefully it will be faster for you to get your tablet working again. Here is a link. This is for the US Tab Pro 10.1 SM-T520.
T520UEUANI1_T520XARANI1_XAR.zip
https://onedrive.live.com/redir?resid=a628a551d04c1283!721&authkey=!ALKYL7IcLyekSgg&ithint=file,zip

thank you for those who warned about the wifi problems this OTA introduced. I'm just going to keep ignoring the tablets request to update. I thought i got a great deal on this tablet when i got a refurbished one for under $300 several months ago... but samsungs lack of support for this tablet is astonishing.

nxp3 said:
Boy am I glad to find you guys with the same problem as I have. Couple of days ago I saw an update message and decited to go for it. Well, as all of you know, wifi stops working. Factory resets gets it working again but once everything is restored it stops working again! This is quite frustrating and I hope Samsung is working on a fix right now. I haven't been on XDA for a while and only rooted phones before. So how is the rooting/mod scene for tablets. Any good Custom Roms out there we can use until/when this is resolved? I'm good with directions and done some custom roms on my phones before. Let me know what's the good ROMS out there are...the bloatfree version is a welcome even without KNOX, I don't really use it.
Click to expand...
Click to collapse
i'm being prompted to install a 83.54 mb update, i dont know if its the bad OTA you list or if its a new one. Anyone have any idea what it is?

Unable to start Wifi & Bluetooth

My LG G3 wifi & bluetooth stucked at turning on. Tried factory reset, flashed the ROM & use FXR wifi fix and rescue but still not working. Have not tried changing to another Kernel yet. Could it be hardware problem?

I don't think so... Maybe an app is in conflict with wifi & bt.
Inviato dal mio LG-D855 utilizzando Tapatalk

f.gritti97 said:
I don't think so... Maybe an app is in conflict with wifi & bt.
Inviato dal mio LG-D855 utilizzando Tapatalk
Click to expand...
Click to collapse
But I've already factory reset & flashed the latest stock ROM. Did not install any apps except the default apps.

fongkit82 said:
But I've already factory reset & flashed the latest stock ROM. Did not install any apps except the default apps.
Click to expand...
Click to collapse
I don't know how to hekp you then... That's pretty strange to me [emoji53]
Inviato dal mio LG-D855 utilizzando Tapatalk

Similar issue on my end - About a month ago, I opened a support ticket with LG. They returned as "repaired" and my phone worked for about three days before the issue returned.
Using Titanium Backup, I restored the bluetooth system software and it worked for about a day. Considering flashing my phone back to stock and starting over.
If anyone has experience on finding a permanent fix to this issue, I'd be all ears.

Try booting into safe mode and see

I'd be very interested in a fix for this too.
I've a completely stock unrooted D855 that last week seemed to over heat and shut itself down. On restarting it's eaten it's way through the battery in very short order, gotten hot and shut down again. Rince and repeat a couple of times. I've then factory reset and its continued to do the same thing.
Further investigation has shown the WiFi and Bluetooth "turning on" constantly without ever actually turning on. And I've then discovered that the MAC address (and Bluetooth equivalent) are missing.
Would appreciate any help possible

Seems like i'm not alone. Yup my phone auto restarted few days ago after turning on wifi & it keep rebooting if the wifi is turned on. Only stable after i flash the ROM but the WiFi & Bluetooth issue persists. Safe mode does not help.

Same issue started 2 weeks ago. Factory reset didn't fix and battery life being killed by constant searching for BT and wifi. Unlocked G3. Waiting for Marshmallow in the hope it fixes it.

You could also have broken firmware when i got my g3 wifi turned on and off and always dropped connections i ended up reflashing stock with flash tool and tot method and it fixxed i had a bad firmware download straight from lg

hmm so no one has a way to fix this issue?

fongkit82 said:
hmm so no one has a way to fix this issue?
Click to expand...
Click to collapse
Same problem here, wifi and bluetooth mac address unknown, return to stock with kdz files, 10a, 10f, 20, 21a, nothing work, .tot method also not work.
On 4.4.4 = boot loop, and for android 5 battery drain and wifi bluetooth issues.
Waiting for marshmallow

i found a post by someone else in another forum that fixed this problem. I followed some of his steps to reboot into safe mode to turn off the bluetooth & wifi but it didn't work so i turn on Airplane mode while i'm on safe mode & reboot again in safe mode & it works.
http://forums.androidcentral.com/lg-g3/595554-lg-g3-wifi-bluetooth-won-t-turn-why.html

Any fixes with Marshmallow ?

Would be good to know a fix as recently happened to me. Can now only use data for Internet and am getting through a battery in 3 and a half hours as the phone is constantly trying to connect the WiFi and BT. Tried Factory reset. Used LG Mobile Support to update software. Now finally have the lovely Marshmallow but the issue remains. Please help!

Has anyone found a solution to this problem?

Anyone found anything on it?

Same problem here. Wifi and bluetooth randomly stopped working. It works randomly sometimes..
Wifi mac address shows as 00:02:00:00:00:00

New Battery
Hey everyone, I had the same problem. After installing an OTA update, my D850 crashed. When it started up again, I had no WiFi/BT. I tried several factory resets, flashing multiple custom roms, tried unrooting and returning to stock. Was convinced it was a hardware problem. As a hail mary, I ordered a new battery off Amazon. I put the replacement battery in my phone, and WiFi and Bluetooth are now fully functional. Is it possible that everyone with this problem just has a bad battery? It's definitely worth a shot.

probably a hardware issue...
Hey guys,
if brysclar's hint about the battery (see right above) doens't help you, you might want to check out a detailed summary I've written about this issue here: http://forum.xda-developers.com/general/help/qa-wifi-stuck-mac-020000000000-g2-g3-g4-t3452133
Good luck!

[Q] disappeared LTE all firmware

What is done:
first I flash 30B bump, the problems starte. then flash 30B LGUp, flash 21a and 21c, change band in ingeneering menu, delete lteconfig, flash 30b bump with modems: 21a, 21c, 30b hybrid, change of operator, manual config APN, manual search network. All this does not help.
Any ideas?

no ideas?

Idem.
But after reboot 4G is ok, but again...every morning i lost signal 4G...only 2G/3G is ok. So..reboot & 4G is up......disappointed.

Same on my G3. I downgrade from MM to LP but problem persist.

Same here....tried rollback to kitkat stock, LP stock, CM12, Cm13, and some other roms with no luck....have just flashed stock LP for repair...

so today I tried swapping my SIM with my friend's
he is using G3 with stock 21A, and his SIM is of the same carrier as mine
after swapping, I found that my phone (and of course his phone, too) is working normally
my phone is normal even after swapping back
did some different tests like switching on and off with 3G, LTE etc., everything is normal, at least at this moment

Still working with you? So it is sim card fault? With me after searching networks everything seems to be ok, but I couldn't connect with LTE. Only sometimes successfull connection.(once a day and after reboot same...) Very strange. :/

I lost network signal randomly... i tried with 30b hybrid modem, 21a, 21c... kdz method, twrp bumped rom... and doesnt help me at all.. my network signal gets a rotating circle randomly... and in that time my phone is out of coverage... it is .... hundred times in a day... i dont know what to do, please help

same here when i use sucks 30b D855, but now everything is ok with me.
Steps that have been followed:
downgrade to lollipop 5.0
install CandySIX Rom , then try to connect to my carrier network , at the first time it not give me anything , but when i reboot my phone , LTE appears and everything fine
back to CloudyG3 2.5 then i found that the problem resolved
My phone now works well

OKAY, i found a solution to the problem and here is what i found :
Pacote-san said:
Same here...
Edited: Fixed this deletings the folder LTEconfigs on System/app
Had to then configure it to auto GSM/WCDMA then switch back to LTE auto
It connected at first with 3g then it went LTE and worked normally
Click to expand...
Click to collapse
i made it and not i have no drop in connection and i am sure that i will receive the next important call from my colleges.
I hope that this help you as it helped to me!
All the best!

goly1993 said:
Still working with you? So it is sim card fault? With me after searching networks everything seems to be ok, but I couldn't connect with LTE. Only sometimes successfull connection.(once a day and after reboot same...) Very strange. :/
Click to expand...
Click to collapse
Some people got their phones back to normal by flashing some roms (like CM, ACIP, stock, etc.), but that didn't work for mine
not sure if it was sim card fault, but my problem solved (at that time i was back to LP stock 20h) after swapping my sim cards with my friend's.
i am still using that sim card at this moment, working fine since last thursday

Same problem here, have signal drops on MM roms with LTE connection.
Tried all methods above, nothing really helps .. ;((
The signal is fine on LP roms, tho i installed N&N so i was able to change network type to GSM/WCDMA auto, having steady signal now, but missing LTE speed, trying to find solution to fix this, but unfortunately for now.

Same, my G3 doesn't recognize my sim sometimes or it just loses signal randomly, making the smartphone almost useless.
I tried CloudyG3 2.5 Lollipop, then upgrading to Marshmallow with many radios flashed (also the hybrid one) , then I tried to come back to a stock Lollipop ROM and the signal is always unstable. I'm going crazy due to that. I'm starting to lose hope too.

I think I've tried every possible solution to the connectivity problems I've read since flashing 30b.
Freezing LteConfigs gave me more stability, but didn't solve the problem completely. Tried editing the build.prop to force LTE as preferred network type, this didn't change anything. Don't even know how many times I've changed my apn settings.
Tried every combination of modems possible: 21a/c modem with 30b rpm/tz, pure 21a/c, pure brazilian 20c, brazilian 20c with 30b rpm/tz and nothing. Changed sims multiple times, didn't work.
The only way to get a reliable connection is to limit the phone to 3G... but that isn't a solution since I pay for unlimited 4G. If I let the phone in auto mode, the instant it tries to connect I lose all connectivity and it would take up to 2 minutes searching for the network.
I'll flash the stock rom today and if it doesn't work I can safely say it should be a hardware problem.

soulstaker said:
I think I've tried every possible solution to the connectivity problems I've read since flashing 30b.
Freezing LteConfigs gave me more stability, but didn't solve the problem completely. Tried editing the build.prop to force LTE as preferred network type, this didn't change anything. Don't even know how many times I've changed my apn settings.
Tried every combination of modems possible: 21a/c modem with 30b rpm/tz, pure 21a/c, pure brazilian 20c, brazilian 20c with 30b rpm/tz and nothing. Changed sims multiple times, didn't work.
The only way to get a reliable connection is to limit the phone to 3G... but that isn't a solution since I pay for unlimited 4G. If I let the phone in auto mode, the instant it tries to connect I lose all connectivity and it would take up to 2 minutes searching for the network.
I'll flash the stock rom today and if it doesn't work I can safely say it should be a hardware problem.
Click to expand...
Click to collapse
I had exactly the same problems I tried all of the solutions mentioned modems/roms/etc but what solved it for me was flashing the Pure stock MM kdz now no signal drops or 4g problems.

tallman43 said:
I had exactly the same problems I tried all of the solutions mentioned modems/roms/etc but what solved it for me was flashing the Pure stock MM kdz now no signal drops or 4g problems.
Click to expand...
Click to collapse
Did you root after flashing the kdz? I'll try with pure 30B but having no root is almost as bad as no 4G.

soulstaker said:
Did you root after flashing the kdz? I'll try with pure 30B but having no root is almost as bad as no 4G.
Click to expand...
Click to collapse
No not rooted it yet, to be honest I don't like the kingroot app it looks way too suspicious to me + the rom is smooth and stable at the moment so I thought I would stick with stock for a while.
Sent from my LG-D855 using Tapatalk

You could take a look on this : http://forum.xda-developers.com/lg-g3/help/annoying-lg-g3-problem-lte-signal-solved-t3293721
This is my answer to this mass problem. Hope this help yo all you !

mccloud90 said:
You could take a look on this : http://forum.xda-developers.com/lg-g3/help/annoying-lg-g3-problem-lte-signal-solved-t3293721
This is my answer to this mass problem. Hope this help yo all you !
Click to expand...
Click to collapse
This worked for me after nothing else had. Thanks a lot!
Sent from my LG-D855 using Tapatalk

adamw said:
This worked for me after nothing else had. Thanks a lot!
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
just say thanks into that thread and vote to be able to other members to be sure that this helps. I am so happy that this method helped you. HF

Can't turn on WiFi

Hi guys, I have discovered an issue few days before. My WiFi don't became on when I turn on the screen. Same as if I want to turn it on manually, the switcher in settings came back to off position itself again and again. But after few try it stayed in on position - but only sometimes. Sometimes I have to reboot phone to get working wifi, immediately after reboot it working without issue. Maybe it have something to do with deep sleep.
I have tried reflash the ROM(leedroid), kernel, uninstall Magisk and now even restore stock TWR backup. But problem is still here. I'm S-ON and don't know what I can try next.

Is there the possibility that the Wi-Fi module of the phone itself (hardware) is acting up ? Just thinking out loud for a bit......

Mr Hofs said:
Is there the possibility that the Wi-Fi module of the phone itself (hardware) is acting up ? Just thinking out loud for a bit......
Click to expand...
Click to collapse
I don't know how to verify it. But I'm not alone who have this issue acording to LeeDroid thread. But I think it must be software issue. If try to switching it on again and again, after few try it generaly turn on the wifi.. From the other end, when wifi working and I turn screen off, wait a few minutes and turn it on, wifi is still running. I have the option that turning on wifi in sleep mode..

It's very strange that just a handful of the complete user base is having this issue. You also restored your stock rom so it's not a leedroid thing for sure, it's also not a mismatch firmware/software (because it's happening on stock software too)
I'm running out of ideas to be honest

Mine even bluetooth stopped too. But I will try flashing official rom and see if that helps.

I've had the opposite problem where my wifi won't turn off unless I reboot it.
I'm about done with this phone. WiFi has always been crap, and phone still reboots randomly several times a day, despite going to Oreo from a clean RUU and trying a couple different ROMs (Maximus and LeeDroid).
Sad thing is, my M8 is still kicking and is bulletproof. My son puts that thru the works and it can't be killed.

I have same problem. In WiFi settings, I always set Keep WiFi on during sleep to 'never'. After I did something with radio settings using dialer code *#*#4636*#*#, I have started facing this issue. For now, I set that setting to 'Always'. I don't know if resetting phone will fix it. I'm using official software from HTC.

I will going to downgrade to Nougat and try it on Nougat firmware with the guide I posted bellow as I'm S-On. Hoping that I not ended up with bricked phone
https://forum.xda-developers.com/htc-10/how-to/how-to-rollback-oreo-to-marshmallow-s-t3787101

Hi guys, let me inform you that I'm o Nougat now and my WiFi problem is gone, it working without issue! So it is not a hardware problem and it has nothing to do with ROM or Kernel. It is something in Oreo (or firmware) what causing this. Maybe there is a problem in OTA to Oreo, who knows. I will take the OTA (by official way) to Oreo later this week and we will see

I'm still on Leedroid Oreo, I turned off button light notifications and volume button tweaks and I have not had the wifi problem since.
Sent from my HTC6545LVW using Tapatalk

Chewieez said:
I'm still on Leedroid Oreo, I turned off button light notifications and volume button tweaks and I have not had the wifi problem since.
Click to expand...
Click to collapse
Those are totally not related to each other, code and settings don't come near Wi-Fi actions. BLN is btw a kernel tweak, volume buttons a rom tweak. I bet my life on it that its something else.
And to ensure you, i use the same tweaks. All fine on my end.

I have tried take OTA by official way = WiFi issue on Oreo
I have tried install OTA from recovery = WiFi issue on Oreo
I have tried install Oreo RUU after OTA to Oreo = WiFi issue on Oreo
But everytime when I downgrade to Nougat, WiFi wokrs like a charm..
Anyone have idea what I can try next? I think that issue is in the Oreo update
@Mr Hofs Wich version are u using? WWE? How you upgraded to Oreo? Thanks

X46X said:
I have tried take OTA by official way = WiFi issue on Oreo
I have tried install OTA from recovery = WiFi issue on Oreo
I have tried install Oreo RUU after OTA to Oreo = WiFi issue on Oreo
But everytime when I downgrade to Nougat, WiFi wokrs like a charm..
Anyone have idea what I can try next? I think that issue is in the Oreo update
@Mr Hofs Wich version are u using? WWE? How you upgraded to Oreo? Thanks
Click to expand...
Click to collapse
Yes i am on wwe 3.16.401. Drastic test is to s-off and convert to wwe.

Mr Hofs said:
Yes i am on wwe 3.16.401. Drastic test is to s-off and convert to wwe.
Click to expand...
Click to collapse
I'm on WWE too, so I don't uderstand why your oreo wifi working well and mine not Your WiFi is turned on all the time or u using taht option which turn off the wifi while phone sleep? How you upgraded to Oreo?

X46X said:
I'm on WWE too, so I don't uderstand why your oreo wifi working well and mine not Your WiFi is turned on all the time or u using taht option which turn off the wifi while phone sleep? How you upgraded to Oreo?
Click to expand...
Click to collapse
Ah oké, i installed the 2.41 ruu and updated via OTA. My Wi-Fi is always on. I'm not using the option to turn it off when the phone sleeps.
Full setup
- 3.16 firmware via official ota
- Basic leedroid rom
- Root via SU (no magisk for me)
No modifications whatsoever.

Mr Hofs said:
Ah oké, i installed the 2.41 ruu and updated via OTA. My Wi-Fi is always on. I'm not using the option to turn it off when the phone sleeps.
Full setup
- 3.16 firmware via official ota
- Basic leedroid rom
- Root via SU (no magisk for me)
No modifications whatsoever.
Click to expand...
Click to collapse
So u updated by the official way as me (setup is same for me). Interesting. Can you try turn on the option which turn off wifi when phone sleep (only without charger) and test it for day or two? Watch on your wifi when You wake up your phone..
It might be enough if you turn it on when you go sleep and watch wifi in the morning when you wake up your phone. And your phone have to unplaged from charger over night..

X46X said:
So u updated by the official way as me (setup is same for me). Interesting. Can you try turn on the option which turn off wifi when phone sleep (only without charger) and test it for day or two? Watch on your wifi when You wake up your phone..
It might be enough if you turn it on when you go sleep and watch wifi in the morning when you wake up your phone. And your phone have to unplaged from charger over night..
Click to expand...
Click to collapse
Sure, will start testing it after work. will report back tomorrow.

Also maybe good to mention is that i am using a 5ghz network. I put the option that my Wi-Fi always go to sleep. Let's see what happens til tomorrow

I wonder if turning wifi scanning off, in location settings, is also a trigger. I think I didn't have any issues with it, then yesterday I turned wifi scanning off and today my wifi toggle didn't work and I had to reboot my phone to ge it back.
Sent from my HTC6545LVW using Tapatalk

I've been playing with different Wi-Fi settings last night and this morning i unlock the device, Wi-Fi reconnected and it continues as nothing happened.
Sorry but i just can't get it to fail.