Related
I am having issues with turning on WIFI in my Rooted Galaxy Note 2 GT-N7100.
Background: After facing various slow down and WiFi drop issues with my Stock 4.3 ROM decided to Root and install custom ROM. Rooted and Installed C-ROM 7.1 on device. Everything was working fine initially but after few days WIFI signals just drop and after that it just wont start. Again flashed and installed DN3 V5.2 LIte ROM,
Problem: Still WIFI wont start, it starts sometime after reboot but keeps scanning and can not detect any WiFi signal and after few minutes it wont start at all.
Solution Tried:
1. Tried Dr. Ketan WIFI Fix multiple times, still no solution
2. Can not downgrade Bootloader to MJ5 because its already on ND3.
3. Tried multiple modems (ND1, ND2 and ND3), no help, getting strong 3G signal but WiFi just wont start.
Current Phone Config:
Device: Samsung Galaxy Note || GT-N7100
Android: 4.4.2
Boot Loader Version: N7100XXUFND3
Kernel: Linux
Kernel Version: 3.0.31DN3
I am not an expert, so please pardon if my question is not clear. Any help will be appreciated. I am OK if i have to unroot or complete wipe my device.
Hardware Problem!?
Looks like something is wired with phone WiFi hardware. After flashing ND2 modem WiFi actually started to work, but stays connected only when signal strength is very high, as soon as signal goes low it drops the connection and never connects again until and unless I reboot the device or go to Airplane mode and come back.
Any suggestion in this regard is welcome otherwise I have accepted this problem as Hardware problem rather then software problem and going to live with it till the time get some good deal for the device.
Exact same problem. but no solution so far.
avithalani said:
I am having issues with turning on WIFI in my Rooted Galaxy Note 2 GT-N7100.
Background: After facing various slow down and WiFi drop issues with my Stock 4.3 ROM decided to Root and install custom ROM. Rooted and Installed C-ROM 7.1 on device. Everything was working fine initially but after few days WIFI signals just drop and after that it just wont start. Again flashed and installed DN3 V5.2 LIte ROM,
Problem: Still WIFI wont start, it starts sometime after reboot but keeps scanning and can not detect any WiFi signal and after few minutes it wont start at all.
Solution Tried:
1. Tried Dr. Ketan WIFI Fix multiple times, still no solution
2. Can not downgrade Bootloader to MJ5 because its already on ND3.
3. Tried multiple modems (ND1, ND2 and ND3), no help, getting strong 3G signal but WiFi just wont start.
Current Phone Config:
Device: Samsung Galaxy Note || GT-N7100
Android: 4.4.2
Boot Loader Version: N7100XXUFND3
Kernel: Linux
Kernel Version: 3.0.31DN3
I am not an expert, so please pardon if my question is not clear. Any help will be appreciated. I am OK if i have to unroot or complete wipe my device.
Click to expand...
Click to collapse
I too had the same problem. My WiFi simply refuses to work. I did everything mentioned on the blogs, forums, YouTube, etc. But could not find a solution.
Let me know if u find the solution.
Any luck?
Struggling with Data charges as ofnow. Any luck in sorting this problem out guys?
ceomaverick said:
I too had the same problem. My WiFi simply refuses to work. I did everything mentioned on the blogs, forums, YouTube, etc. But could not find a solution.
Let me know if u find the solution.
Click to expand...
Click to collapse
I've got exactly the same problem.
Tried from Dr.Ketan's patches, to others wifi fixes, modem fixes, and even others ROM with no luck
Now wifi keeps scanning all the time. :crying:
Current phone config:
N7100XXUFND3
Android: 4.4.4 (just upgraded this morning but still no luck)
Kernel: 3.0.101-India-v4.2.5-OC-INTL-Kitkat
Any help would be appreciated!
Solved
Just an update, I've followed some comments below the video and now my wifi works like a charm.
It seems that the note II housing was the cause, hope it might help you too.
h t t p: //w w w.youtube.com/watch?v=p3YHHOK0dWk
Please someone helps to paste the link as my account has no right to do that.
Cheers,
Hi!
I'm currently running the DN3 ROM and I have installed the latest version of the (v5.5 with update 1).
I'm experiencing connectivity problems where my phone simply loses connectivity. Don't think it is my operator (I'm I Sweden).
I can't post in the dn3 forum (or the developer forum) so I'm asking here hoping someone can help me.
Thanks!
Torpartrollet said:
Hi!
I'm currently running the DN3 ROM and I have installed the latest version of the (v5.5 with update 1).
I'm experiencing connectivity problems where my phone simply loses connectivity. Don't think it is my operator (I'm I Sweden).
I can't post in the dn3 forum (or the developer forum) so I'm asking here hoping someone can help me.
Thanks!
Click to expand...
Click to collapse
I have the same problem just find a good rom that can run it and check your boot loader if its up-to-date
I'm sorry I do not follow. (n00b of n00bs)
Do I have to flash a new/dirrerent ROM or the same one again?
My bootloader is N7100XXUFND3. is that up to date or an old one?
Ok I'm learning as I go here I my bootloader is N7100XXUEMK9.
Is this good or bad? ☺
Ok I'm not sure if this really helped my problem but I tried to think what I had done the day I started having the problems and the only thing I could think of that I had done was installing Adblock. So I uninstalled it and restarted my phone (for the twentieth time today) and then it worked again.
Could this have anything to do with my problem or was it just a coincidence?
Nope! Didn't help at all. Any suggestions?
Does anyone know if this is a problem with the dn3 ROM or if it just me? Haven't seen anyone else with this problem.
Torpartrollet said:
Does anyone know if this is a problem with the dn3 ROM or if it just me? Haven't seen anyone else with this problem.
Click to expand...
Click to collapse
I have the same problem with the latest DN3 rom..
Anyone here to help???????
Most annoying! Phone unusable right now.
I don't even get it to work when I restart my phone. But then, every once in a while, it comes back and works for maybe a day or so. The steps again. Says unable to connect to network..
Torpartrollet said:
I don't even get it to work when I restart my phone. But then, every once in a while, it comes back and works for maybe a day or so. The steps again. Says unable to connect to network..
Click to expand...
Click to collapse
Are you still having these issues?
ludovicianul said:
Are you still having these issues?
Click to expand...
Click to collapse
Had to switch ROM. I'm on the Dr Ketan ROM now. That solved the problem though.
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
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?
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!