Develop Bugs

Proper GPS fix

I've seen quite a few "flash back to stock, then flash AOSP" fixes to get your GPS working. All you have to do to really fix the GPS is:
1. Backup your stock ROM's EFS through your recovery. (Do NOT wipe prior to doing this.)
2. Wipe
3. Flash AOSP based ROM.
4. Restored your ROM's EFS through your recovery's advanced restore.
Done.

GPS is my ROM's Bane!
ivanmmj said:
I've seen quite a few "flash back to stock, then flash AOSP" fixes to get your GPS working. All you have to do to really fix the GPS is:
1. Backup your stock ROM's EFS through your recovery. (Do NOT wipe prior to doing this.)
2. Wipe
3. Flash AOSP based ROM.
4. Restored your ROM's EFS through your recovery's advanced restore.
Done.
Click to expand...
Click to collapse
So, I am having a GPS issue that I've been unable to solve through any of the numerous method's posted around XDA (my primary source of all things android) and related sites. It could be a simple solution, but I've exhausted my very limited knowledge and am hoping you have some input or suggestion...
I'm on the LS970 and in an over-caffeinated moment, I fully wiped the stock ROM without a backup. I know that is totally stupid, and have been much more careful with my fingers since then. :silly: I have been unable to get a GPS lock on Spleef's Carbon 4.3 20131020 (or any previous), so tried to factory restore and TWRP flashed a ZV9 ODEX (failed install), ZV7 STOCK (failed install) and SPR-ZVB which flashed successfully but gave me FCs and reboots everytime I opened an app that would get a GPS lock. I have tried the FasterGPS, GPS Status and Toolbox, and edited my GPS.conf. Since I can't get back to factory, I need another way to get to a "factory-enough" for a GPS lock...
Any ideas? I think maybe there's a path/process to follow to be able to go from AOSP to stock that I'm not doing, but I have no idea what it is.
Fingers Crossed!

I was having the same issue with Bean Stalk then carbon also. using the app GPS essentials it would show 0 satellites in the sky even though GPS was enabled.
I flashed the Optimized ROM in the DEV section and this did bring back the GPS functionality.
just an FYI since your stock ROM is gone.

etownguy said:
I was having the same issue with Bean Stalk then carbon also. using the app GPS essentials it would show 0 satellites in the sky even though GPS was enabled.
I flashed the Optimized ROM in the DEV section and this did bring back the GPS functionality.
just an FYI since your stock ROM is gone.
Click to expand...
Click to collapse
Fabulous! Thank youuuuuu!
EDIT: Is this it? http://forum.xda-developers.com/showthread.php?t=2468979

Got the GPS Lock!! (Carbon4.3)
etownguy said:
I was having the same issue with Bean Stalk then carbon also. using the app GPS essentials it would show 0 satellites in the sky even though GPS was enabled.
I flashed the Optimized ROM in the DEV section and this did bring back the GPS functionality.
just an FYI since your stock ROM is gone.
Click to expand...
Click to collapse
You have SAVED MY WORLD!! HUURAAAAYYYYY!!!!!! :highfive:
The OpTimized ROM was PERFECT in bringing back my GPS, it locked in seconds. It took me a few tries to get it active on Carbon4.3, so I'm going to give my "steps" for successful completion.
I FULL WIPED before flashing OpTimuS_V4.4 (ODEX) - that's Data, System, Dalvik and Cache. (Obvious? I first ran a full TWRP Backup of the system, data, boot)
Then I flashed, booted, and let it go through its process. It took its own "soft reboot" which I thought would turn "Bootloop" but it did NOT... rebooting to the "Semi Stock OpTimuS" perfectly. It did the "Activate" process on its own.
Then - I went to System Updates. PRL first, then Profile. Then the VITAL UPDATES were Google Maps and Play Services.
After this, I rebooted to let it reacquaint, and then installed FasterGPS, using it to clear the current aGPS. Next, installed FreeGee.
Opening the updated Google Maps, I IMMEDIATELY got the lock, but let it sit for 5 minutes. (reset "display time" to 5 minutes to keep track.)
Next - AFTER the GPS locking for 5 minutes, I did a backup of EFS with FreeGee. If you have PREVIOUS BACKUPS on the Internal Storage, they need to be replaced. This can be easily done with ES File Explorer, or any which allow root access. Go to the active (sdcard on LS970) FreeGee, copy the EFS settings, and replace those in the "/0" or Legacy FreeGee folder.
This may be "overkill" but I went back into Google Maps, got a Lock again, let it sit a few minutes and "tested" the navigation function.
While still in Maps, I powered down. Booting into Recovery (I use TWRP), I ran a RESTORE of my TWRP Backup, since the backups aren't "install" compatible. My fear was the "Restore" would override my updates, but when you run it, just "uncheck" EFS in the restore choices and you're :good:.
My LS970 booted up LOVELY, ran its normal boot process, and when I opened Google Maps .... ~*Aaaaaaaahhhhhh~* light from the Heavens! It locked FAST, and the Nav even worked!!
I have been trying to find this Fix for almost TWO MONTHS so I am on Cloud 9 right now!! Thank You @etownguy!!!

GPS locking issue
Hello all,
I am an intermediate novice at flashing, but Ive gained some knowledge over the recent years here and there. Heres the issue, I am running into the same issue as euphoric fuzion except I have exhausted all that I know. I rooted, unlocked bootloader and flashed my ls970 without creating an official Rom backup or backing up my EFS- I know, not bright of me. After using my new roms I realized that MY GPS isnt locking. So, Ive done everything from writing new NPS locations in gps.conf, attempting to go back to stock via LGNPST-Ive used the auto option, Flash tool and they dont seem to recognize my phone via download mode but the drivers are installed-pc recognizes. One flash tool actually recognizes my phone as another model. Ive tried to flash stock based Roms-one ins particular at no suceess-symlink failure. Attempted to flash ZVC stock based Rom with Firmware flash- the phone remains in bootloop from my previous ROM. In order to use the phone I have to reinstall CM11- my fav for now- but I cannot lock my GPS with out SPrints PRL update, or network update for my profile. Any suggestions? Thanks in advance

[Q] Battery drainage because of mobile data

Hi Guys,
I am new to this forum and got a small question. My girlfriend has an Oppo Find 7a. You guys probably know that the stock ROM is ColorOS. In my opinion it's crappy as hell, lots of bugs and issues, so I decided to flash Dirty Unicorns 5.02 on it. I did that yesterday and all is working fine so far, except that the battery drained from 100% to 64% last night (in 8 hours). See the photos attached. According to the photos it seems clear that the issue is the mobile data usage. I've checked the settings and it seems mobile data loses connection, connects again and loses connection everytime. Probably this is the cause of the battery drainage. Somewhere on this forum I read something about flashing Alucard 1.1a kernel on it to fix this issue. I want to try this in the evening, but does anyone know the correct type of this kernel as I found different alucard 1.1a download links?

Can someone please help me out with this? Yesterday evening I just flashed the Alucard 1.1a kernel via the custom recovery. I also removed dalvik/cache and rebooted after that. The Oppo boot logo appeared, but it stayed like this for 20 minutes. I'm not sure if I have to wait any longer to make it work or if the phone is just not booting up anymore with this kernel. Any advice?

GRDD_ said:
Can someone please help me out with this? Yesterday evening I just flashed the Elucard 1.1a kernel via the custom recovery. I also removed dalvik/cache and rebooted after that. The Oppo boot logo appeared, but it stayed like this for 20 minutes. I'm not sure if I have to wait any longer to make it work or if the phone is just not booting up anymore with this kernel. Any advice?
Click to expand...
Click to collapse
before flashing DU did you flash proper modem and trustzone firmware?

treacherous_hawk said:
before flashing DU did you flash proper modem and trustzone firmware?
Click to expand...
Click to collapse
Nope, actually I didn't. I wasn't aware of the fact that this was necessary. I had ColorOS 2.0.0i on it and flashed DU directly on it.
Can you maybe tell me what the proper modem and trustzone firmware is? And can these still be installed now even if DU is already flashed on it?

GRDD_ said:
Nope, actually I didn't. I wasn't aware of the fact that this was necessary. I had ColorOS 2.0.0i on it and flashed DU directly on it.
Can you maybe tell me what the proper modem and trustzone firmware is? And can these still be installed now even if DU is already flashed on it?
Click to expand...
Click to collapse
well you can do a clean flash again but this time you have to follow this for how and why to flash modem and TZ firmware:
https://plus.google.com/+BoskoTrkulja/posts/CENAM1a7Zob
you can get the modem and tz firmware here:
https://www.androidfilehost.com/?fid=95916177934529695

Sir, have my thanks! You are my hero of today. Thanks a bunch. I'm going to try this

treacherous_hawk said:
well you can do a clean flash again but this time you have to follow this for how and why to flash modem and TZ firmware:
you can get the modem and tz firmware here:
Click to expand...
Click to collapse
So, one more thing If I may ask. What is the best thing to do from here on:
1. Flash modem, flash firmware, flash DU (directly over the DU rom that is installed now without doing a factory reset / wipe)
2. Flash modem, flash firmware, perform a factory reset / full wipe and then flash DU.
And will the newly flashed modem and firmware stay on the phone when i do a full wipe?

GRDD_ said:
So, one more thing If I may ask. What is the best thing to do from here on:
1. Flash modem, flash firmware, flash DU (directly over the DU rom that is installed now without doing a factory reset / wipe)
2. Flash modem, flash firmware, perform a factory reset / full wipe and then flash DU.
And will the newly flashed modem and firmware stay on the phone when i do a full wipe?
Click to expand...
Click to collapse
do a clean wipe, then flash modem, then firmware (in bootloader) and then rom along with gapps.

treacherous_hawk said:
do a clean wipe, then flash modem, then firmware (in bootloader) and then rom along with gapps.
Click to expand...
Click to collapse
Alright, I will do it in that order then. Thanks again. Much appreciated.

treacherous_hawk said:
do a clean wipe, then flash modem, then firmware (in bootloader) and then rom along with gapps.
Click to expand...
Click to collapse
It's been a few weeks, but I finally had the time to do this. I've done a full wipe in TWRP and then flashed the modem on it. This showed succesful. It took about 10 minutes before the phone booted up afterwards. After that all seemed fine, so i've put the phone in bootloader via a command in cmd and installed the firmware. This also went succesful, but now I still have the same issues on the Oppo regarding the provider issue as mentioned earlier. The data connection is still being lost very often and it still seems to be draining battery (although less than before). Is there something else I can do to fix this ?

GRDD_ said:
It's been a few weeks, but I finally had the time to do this. I've done a full wipe in TWRP and then flashed the modem on it. This showed succesful. It took about 10 minutes before the phone booted up afterwards. After that all seemed fine, so i've put the phone in bootloader via a command in cmd and installed the firmware. This also went succesful, but now I still have the same issues on the Oppo regarding the provider issue as mentioned earlier. The data connection is still being lost very often and it still seems to be draining battery (although less than before). Is there something else I can do to fix this ?
Click to expand...
Click to collapse
If you have recently done a clean install, give it some time to settle down. For Data connection issue, make sure to check your APN and also try a different sim or this sim in some other phone, could be signal reception issue.

treacherous_hawk said:
If you have recently done a clean install, give it some time to settle down. For Data connection issue, make sure to check your APN and also try a different sim or this sim in some other phone, could be signal reception issue.
Click to expand...
Click to collapse
I will give the battery thing some time to settle down then. About the data connection issue; This was not an issue on coloros, but I will check apn and try another sim. Thanks again!

I've changed the APN settings, as they stood on some kind of roaming setting. It's now been set to live.vodafone and seems to be functioning better already . If I still run into some issues I'll let it know. Thanks for helping me out

Recover IMEI, baseband, WIFI and random reboots

So, yesterday I unlocked my OnePlus 3, rooted it and flashed a custom recovery. So I managed to install MIUI 8, and fingerprint scanner didn't work, so I flashed 3.2.4 firmware. Then I realised that I couldn't get my native language and I installed CM14, but before I flashed 3.2.6 firmware. As far as Nougat is still not ready for my daily usage, I restored OOS 3.2.6 from my entire backup.
I couldn't unlock the device. The pattern was not recognised as correct, even if it was. So I flashed cleaned data, cache and dalvik, and from here my problems started. I had no IMEI, no baseband, no wifi, my phone constantly randomly rebooted, so I tried to flash EFS twrp restore. Nothing. I tried with 3.2.6 firmware. Nothing. I decided to return "original". I copied JUST the EFS and Boot backup from TWRP folder to my pc, locked bootloader, flashed original recovery and OOS 3.2.7. Still the same problems, plus at the beginning I couldn't even complete my first setup. My actual condition is:
OnePlus 3 A3003, locked bootloader, unrooted, stock recovery, oem unlocked, debug enabled, efs partion (at this point I think so) messed up, efs backup doesn't work. Any help would be appreciated. Thanks in advance
EDIT: As the user @_ekis_ suggested me via private message, I flashed OOS, performed a "Fastboot erase modemst1;
Fastboot erase modemst2", and I got back IMEI, baseband (most important thing for me) and SIM. And no more random reboots. But there is still a problem: the wifi. It seems it disabled. Whenever I activate it, I cannot see any wifi, I cannot refresh the WIFI list etc. I already backed up my EFS, and I will perform a new OOS installation via fastboot. I hope for the best
EDIT 2: And yes, it worked! Now everything is back. A real thank you to @_ekis_ for his support and all the OnePlus 3 Telegram group.

Try flashing a modem package and it might help the imei. Theres a thread on the modems around here somewhere.

NZnewbie said:
Try flashing a modem package and it might help the imei. Theres a thread on the modems around here somewhere.
Click to expand...
Click to collapse
I don't mind about IMEI. The only thing I want back is just the baseband. I'm trying to flash OOS 3.2.6 now.
If it will not work, I will perform a modemmst erase

LuckyNuke1310 said:
EDIT 2: And yes, it worked! Now everything is back. A real thank you to @_ekis_ for his support and all the OnePlus 3 Telegram group.
Click to expand...
Click to collapse
Heya! Got the same problem couple days ago, would you be so kind and share how you managed to get your WIFI working again? It will save a tonn of my nerves.

LG G3 with cm-13.0-20161002-NIGHTLY-d850. Issues faced, guidance required.

New to the world of Custom ROMs. A week ago I installed CM 13 which took great courage on my part and wanted to share my experience, issues and discuss possible solutions.
My phone had the latest lollipop on it. And McCafee locked. The steps that worked for me where
1) Did a factory reset and bumped into mccafee.
2) Tried download mode but kill switch was enabled.
3) Rebooted the phone to face mccafee, tried 123465 pin which worked.
4) Disengaged McCafee but not before transferring ownership to my email.
5) Tried rooting didnt work with any method.
6) Rolled back to d software version stock lollipop.
7) Rooted with PurpleDrake
8) Replaced with CM recovery didnt work.
9) Replaced with TWRP and rebooted directly to recovery
10) Installed CM and gapps mini. Worked fine. Voila!
Issues:
1) No Custom recovery sticks, whenever I flash with a custom recovery like TWRP or Clockwork. I have to reboot into recovery immediately or the custom recovery is replaced by stock. It happens on every second reboot.
My concern is here if I get stuck into bootloop and dont have a custom recovery I might not have any other option than the stock ROM which does a full reset. How can make TWRP stick forever?
2) After installation of Custom ROM there have been random reboots, I suspect there is something here with phone app or voice. So far the reboots have been when I try to call using fb messenger, appear.in and phone app itself.
Is there a guide that tells me how to track this down?
Can I install a newer Nightly and hope this get fixed?
How can I retain my apps and data when installing a newer nightly? since all guides ask to wipe everything :S
I have a backup of system and data partitions, can I use that with other ROMs.
What ROMs have a better chance of fixing this issue?
Coudnt find Stock M for D850. Why arent those available?
Should an Official ROM be more reliable than CM for this?
3) Bad signal reception so far. It may be a generic g3 issue.
Can I hope that this issue be fixed with a different ROM or updates from Cynogen?
Someone said you may have to flash the radio partition. My question is where can I get a brief understanding of what partitions there are in android and which are risky. Which ones can be replaced, backedup and replaced back.
4) Whenever the phone reboots, it gets stuck into bootloop unless I remove the SIM card. Then I power off and install SIM Card and reboot and it boots fine.
I am already tracking CM changelog for something important. Cant post urls as of now :S

Nv Rebuild ... Custom. How to restore...

Hello this is my 1st post on this forum, i have a 7105 lte no operator and im from portugal. Ive tried cm rom and after that Dn4 rom, all works great except for gps. I was in the change i gess that afected my gps lock, i have read and the only thing i think that haven,t tried was the nv rebuild but, say a custom and won,t allow me to reset. I havs tried with stock rom, with dn4, with root and without same thing.... can anyone help me?.

Choco Man said:
Hello this is my 1st post on this forum, i have a 7105 lte no operator and im from portugal. Ive tried cm rom and after that Dn4 rom, all works great except for gps. I was in the change i gess that afected my gps lock, i have read and the only thing i think that haven,t tried was the nv rebuild but, say a custom and won,t allow me to reset. I havs tried with stock rom, with dn4, with root and without same thing.... can anyone help me?.
Click to expand...
Click to collapse
Flash stock ROM again.
Sent from my GT-N7100 using Tapatalk

Allready did that multiple times. Also my nv rebuild says custom and dont allow me to acess it

Like this... this post resumes my problem... HELP
d0ctorj3kyll said:
Hi
XDA newbie, still learning where everything is! I posted this question in the general help thread but got no replies, then I found this section so please pardon the repost
I have a rooted Galaxy Note 2 N7105 (t0lte I think) running Samsung Stock software 4.4.2. I have previously installed various version of CyanogenMod and Ditto Note, and somewhere along the line have lost my GPS functionality! Running CWM recover, not sure what version off the top of my head. The exact issue is that when I turn GPS on, it shows the "searching" symbol endlessly and will not lock to any satellites.
I have tried reflashing the modem and every GPS fix app that I've seen suggested on forums, and it still will not lock my location by GPS. Power saving (wi-fi and mobile network) location still works.
From my research, I believe the NV Rebuild method (listed here http://forum.xda-developers.com/showthread.php?t=2211690) is what I need to do in order to fix the problem. However when I access the hidden dialer menu and select NV Rebuild it tells me "Not Support in Custom Binary!" Other people have had this issue and posted asking for help in the thread, but nobody replied or helped them.
As I mentioned, I am running stock Samsung software, not a custom ROM. The phone is rooted, and I do have a few Xposed modules installed. I also used Triangle Away and my bootloader shows the device status as Samsung Official. It also showed Official in settings when I tried to run the NV Rebuild. As far as the information went, this should be all I needed to make NV Rebuild work, but it still gave the custom binary error.
Does anyone have any suggestions for how to get around this? Do I need to completely unroot my phone and reflash a vanilla copy of Samsung 4.4.2 before it will work, or is there a workaround to make the service menu read my phone as official and run the NV Rebuild?
Any thoughts or ideas would be HUGELY appreciated as this issue has been driving me mental! (Please let me know if you need further information and I will try to provide it ASAP)
Thanks in advance!
Click to expand...
Click to collapse
Helpppp

Choco Man said:
Helpppp
Click to expand...
Click to collapse
Try lineageOS 14.1. My GPS was dead after going back to kitkat after lineage. NV rebuild also not support in custom binary. Found the solution here https://forum.xda-developers.com/ga...nt-n7105/rom-lineageos-n7105-t3538310/page136
From lineage I did only a format(not wipe or factory reset, I dont know what is the difference) in TWRP 3.2.3 and flashed zip of the omnirom kitkat, and GPS was working, then format and flashed official FTM ROM. Maybe not need to go via omnirom, for me it was clear that kitkat is not getting the fix and it was easier to flash a zip kitkat than an image from Odin.

chitz852 said:
Try lineageOS 14.1. My GPS was dead after going back to kitkat after lineage. NV rebuild also not support in custom binary. Found the solution here https://forum.xda-developers.com/ga...nt-n7105/rom-lineageos-n7105-t3538310/page136
From lineage I did only a format(not wipe or factory reset, I dont know what is the difference) in TWRP 3.2.3 and flashed zip of the omnirom kitkat, and GPS was working, then format and flashed official FTM ROM. Maybe not need to go via omnirom, for me it was clear that kitkat is not getting the fix and it was easier to flash a zip kitkat than an image from Odin.
Click to expand...
Click to collapse
Your solution gains my interest. I am using GT-N7105 too. The road of Roms I have been through is Lineage 14.1 -> Resurrection Remix 5.8.5 -> Stock 4.4.2
When I went back to the Stock rom, GPS totally unable to detect any satellite using any GPS tools app. IMEI blank but Baseband is still there, the weird thing is the phone network signal works without issue. :angel:
Have been trying many ways to fix GPS including reflash stock rom but still failed. I went back to resurrection remix 5.8.5 and GPS works without issue but IMEI is still blank.
Any recommended omni rom as you mentioned? and what is official FTM rom? A stock rom?