IMEI & Baseband unknown after OTA flash - Nexus 6P Q&A, Help & Troubleshooting

I side loaded the N OTA on my 100% stock 6p. All went well and it booted fine, everything was good for over 24 hours, until i rebooted for the simple curiosity of how much faster the boot time might be. Well, after that boot, my phone wont read a sim card, the imei and baseband are unknown and all cell service is gone. I did a factory restore with no luck and have fully flashed back to stock MM twice now and the problem remains. Some googling points to a corrupted EFS partition. Any methods to getting this fixed on a 6p?
Thanks

Jaa-Yoo said:
I side loaded the N OTA on my 100% stock 6p. All went well and it booted fine, everything was good for over 24 hours, until i rebooted for the simple curiosity of how much faster the boot time might be. Well, after that boot, my phone wont read a sim card, the imei and baseband are unknown and all cell service is gone. I did a factory restore with no luck and have fully flashed back to stock MM twice now and the problem remains. Some googling points to a corrupted EFS partition. Any methods to getting this fixed on a 6p?
Thanks
Click to expand...
Click to collapse
Do you have a backup of your EFS partition?

Nope, didnt have a backup of anything, was running 100% stock. No root, no custom anything.
Funny how i rooted and ran custom recovery and firmware on all my other devices, but when i get my first nexus, i run 100% stock.

Jaa-Yoo said:
Nope, didnt have a backup of anything, was running 100% stock. No root, no custom anything.
Funny how i rooted and ran custom recovery and firmware on all my other devices, but when i get my first nexus, i run 100% stock.
Click to expand...
Click to collapse
Any solution for this? I also have imei unknown, baseband unknown issue. I don't have an efs backup either. Also flashed stock rom, but it didn't help. Any suggestions would be really appreciated.

Related

Device Status back to Custom without doing anything.

Hello guys, so yesterday i have managed to make my Device Status to Official by flashing I9500-OFFICIAL-STATUS-MOD.tar through Odin v3.04
I did a factory reset, restored my backups through titanium rebooted 2-3 times to confirm everything and everything was perfect. But this morning when i powered on my device it said custom again. what happened? what did i do wrong?
andys93 said:
Hello guys, so yesterday i have managed to make my Device Status to Official by flashing I9500-OFFICIAL-STATUS-MOD.tar through Odin v3.04
I did a factory reset, restored my backups through titanium rebooted 2-3 times to confirm everything and everything was perfect. But this morning when i powered on my device it said custom again. what happened? what did i do wrong?
Click to expand...
Click to collapse
If u have used titanium backup then u have rooted phone if it's rooted it has to be custom only
If u want all Official u must have every thing stock
.
to be honest, that status thing is a joke.....i'm on totally stock rom, never rooted, never unlocked or flashed any custom rom, the only thing i've done is put a memory card in it (a samsung branded one at that) and it keeps changing to "custom". madness.

[Q] D803 Phone freezes then reboots every few minutes

What's currently happening is my phone will boot and work normally except it appears the radio is not working then after 60-120 seconds freeze for a second then reboot. Wifi does work but I just see an x for the cell network signal and if I take out the SIM I get no notification. Curiously if I'm using the camera it seems to delay the rebooting by a few minutes.
I've tried http://forum.xda-developers.com/showthread.php?t=2432476 LG G2 Stock Firmware (Go Back to Stock) to no success, I was able to flash, it removed TWRP but I get the same symptoms anyway.
I've tried flashing the Rogers modem and this did not make a difference.
When I noticed this problem was when I was installing/testing some xposed modules, although it seems strange that they could break the phone in this way.
I've run out of ideas and although my phone isn't bricked per say it's near useless if it's going to reboot every minute or two. The phone doesn't reboot if I leave it in download mode or TWRP so this makes me think there's some hope.
Assuming it's not against the rules I'll PayPal anyone who comes up with the fix $50 CAD because right now I'm hooped.
Did you download and try flashing the exposed disabler zip file?
Sent from my LG-D803 using XDA Premium 4 mobile app
Of course there is hope!
All you gotta do is just download this ROM...
http://forum.xda-developers.com/showthread.php?t=2451592
Download it with your PC, then connect your phone to the PC to transfer the file.
The TWRP and flash it and that should fix it all.
Good luck
Do you have a gmail widget on your lockscreen? (Was worth a shot since others have reported varying issues with gmail widgets on the lockscreen).
I lost my recovery when I tried to go back to stock, and I can't seem to install any apps. I'm trying "upgrade recovery" from the LG Mobile Support Tool to see if that works. Otherwise I guess I have to find out how to root and flash a recovery entirely over ADB
I was able to restore the stock recovery and factory reset but that still didn't resolve the issue. Can someone provide a /system/ partition dump of a d803? I'm assuming there's something broken in there but I don't think flashing a ROM will solve that since flashing stock didn't seem to.
mrsocksfox said:
I was able to restore the stock recovery and factory reset but that still didn't resolve the issue. Can someone provide a /system/ partition dump of a d803? I'm assuming there's something broken in there but I don't think flashing a ROM will solve that since flashing stock didn't seem to.
Click to expand...
Click to collapse
If flashing to stock didn't work then your phone may as well be defective...
crzykiller said:
If flashing to stock didn't work then your phone may as well be defective...
Click to expand...
Click to collapse
It's not a paperweight yet, I can adb. I rooted it through adb I'm just not sure what the xposed module broke. It has to be something that persists across flashing stock but I don't have anything to compare against.
EFS. Flash or push your backed up EFS.
Steamer86 said:
EFS. Flash or push your backed up EFS.
Click to expand...
Click to collapse
I don't have one. I made a backup in TWRP but ended up losing it when trying to fix things :silly:. I believe I can still see my IMEI if that's any sign of things not being completely ****ed.
Hi I have LG G2 D802 . My problem is that my phone hangs a lot . I did hard reset but problem didnt go. After hard reset i tried to install custom built rom but still same problem. Then I re installed lolipop 5.0.2 still the same problem .. now
i have downgraded to kitkat and again same problem .. Even now when it hangs It turn off completely like it got bricked or something but it work some time and again after some use it hang.. now i have hardreset my device and putted on standby mood but phone was working fine after some use phone hanged again . I dont understand what is the problem with my LG G2
I am having the exact same problem on stock 4.4.2 with my D803. I have random reboots every few minutes. I suspect it is a hardware issue since the problem persisted even after returning to stock using kdz. Unfortunately, I don't have an EFS backup.
I have tried multiple other ROMS (CM12.1, DU, Cloudy 3.2 and 3.3) and all are even less usable than stock (reboots while I am doing the initial setup).
Any suggestions? I don't know what else to try and am ready to buy a new phone now as this G2 is basically unusable... I'd greatly appreciate any help.
mrsocksfox said:
It's not a paperweight yet, I can adb. I rooted it through adb I'm just not sure what the xposed module broke. It has to be something that persists across flashing stock but I don't have anything to compare against.
Click to expand...
Click to collapse
If you have restored it to stock ....... and you still have the problem, u may have a short somewhere in the phone. The only thing that remains the same is the hardware .... u have changed the software

Fix for people with a corrupt EFS (No network connection or bluetooth)

A few people have had issues with the EFS getting corrupt or wiped on their OPO before they had a working backup. This guide has so far worked for 4 people to restore their EFS allowing them to access mobile data and bluetooth again.
Note: I really don't know why this works, I have contacted the dev of this rom to ask if he has any ideas but still waiting on a response.
1. Flash official TWRP
2. Flash this ColorOS rom using TWRP - http://forum.xda-developers.com/showthread.php?t=2772627 (you can skip all the account setups if you want)
3. Factory reset
4. Boot and setup ColorOS (you should see a network connect now with your sim card inserted, you will need to toggle mobile data on to test that)
5. If you have data in ColorOS you are good to flash back to CM11S anyway you want (you will need to factor reset after flashing back)
6. Save yourself the headache in the future and backup your EFS
Please post if this fix works for you.:victory:
Edit: I've went ahead and downloaded the ROM and I will hold on to it incase the original mirrors go down for some reason. Please PM me if they do.
One of the ones who can confirm this works. Will post in the official thread.
Worked for me also.
Wholy moly ... I have a mobile data network !!
Still on ColorOS, but this is VERY promising !!!
IMEI is correct, it's the one on the box !
Still no WiFi nor Bluetooh mac addresses, though...
Will keep you posted, but this is a HUGE step forward !
Thanx a lot for sharing this !
BTW, serial number is still unchanged and correct.
JP.
EDIT:
Unfortunately it didn't fix my issue, back to CM11S I am greeted by an AudioFX FC... Device pretty much unusable, the FC pops up the milisecond you click OK ...
Will try a different ROM...
EDIT 2:
SlimKat, CM11 Nightly both boot to the welcome screen, then reboot about 1 second later.
Only ColorOS seems to actually run ?!
A bit disgusted right now
tw1tch175 said:
A few people have had issues with the EFS getting corrupt or wiped on their OPO before they had a working backup. This guide has so far worked for 3 people to restore their EFS allowing them to access mobile data and bluetooth again.
Note: I really don't know why this works, I have contacted the dev of this rom to ask if he has any ideas but still waiting on a response.
1. Flash official TWRP
2. Flash this ColorOS rom using TWRP - http://forum.xda-developers.com/showthread.php?t=2772627 (you can skip all the account setups if you want)
3. Factory reset
4. Boot and setup ColorOS (you should see a network connect now with your sim card inserted, you will need to toggle mobile data on to test that)
5. If you have data in ColorOS you are good to flash back to CM11S anyway you want (you will need to factor reset after flashing back)
6. Save yourself the headache in the future and backup your EFS
Please post if this fix works for you.:victory:
Click to expand...
Click to collapse
Hi, i failed and i wiped EVERYTHING of my phone, i only had the fasboot mode, i installed CWM and the cyanogemod rom, now everything works, and i have the imei in the box, however, i dont have the possibility of EFS backup anymore.... any ideas..?
Gambalajillo said:
Hi, i failed and i wiped EVERYTHING of my phone, i only had the fasboot mode, i installed CWM and the cyanogemod rom, now everything works, and i have the imei in the box, however, i dont have the possibility of EFS backup anymore.... any ideas..?
Click to expand...
Click to collapse
Official TWRP doesn't have EFS backup in it, you have the get the unofficial one http://forum.xda-developers.com/oneplus-one/development/recovery-unofficial-twrp-2-7-1-0-t2815247
Yank555 said:
Wholy moly ... I have a mobile data network !!
Still on ColorOS, but this is VERY promising !!!
IMEI is correct, it's the one on the box !
Still no WiFi nor Bluetooh mac addresses, though...
Will keep you posted, but this is a HUGE step forward !
Thanx a lot for sharing this !
BTW, serial number is still unchanged and correct.
JP.
EDIT:
Unfortunately it didn't fix my issue, back to CM11S I am greeted by an AudioFX FC... Device pretty much unusable, the FC pops up the milisecond you click OK ...
Will try a different ROM...
EDIT 2:
SlimKat, CM11 Nightly both boot to the welcome screen, then reboot about 1 second later.
Only ColorOS seems to actually run ?!
A bit disgusted right now
Click to expand...
Click to collapse
Odd, maybe you could try using TWRP to delete everything again including system, then sideload and boot ColorOS.
tw1tch175 said:
Official TWRP doesn't have EFS backup in it, you have the get the unofficial one http://forum.xda-developers.com/oneplus-one/development/recovery-unofficial-twrp-2-7-1-0-t2815247
Click to expand...
Click to collapse
To add to that you can just boot the unofficial recovery using "fastboot boot recovery.img" to do your efs backup if you would prefer to keep the official TWRP installed. That way it only boots that recovery to allow you to do the backup of your EFS partition and doesn't erase your current recovery. That's how I did it.
sabbotage said:
To add to that you can just boot the unofficial recovery using "fastboot boot recovery.img" to do your efs backup if you would prefer to keep the official TWRP installed. That way it only boots that recovery to allow you to do the backup of your EFS partition and doesn't erase your current recovery. That's how I did it.
Click to expand...
Click to collapse
WOW thanks, i do it and and i tell you how did it go in a few minutes.
I see that the OP has been thanked and this thread has a few success stories so I am giving it a bump for others to view in case of the same issue.
I just flashed the factory image... I never had the problem again
Yank555 said:
Wholy moly ... I have a mobile data network !!
Still on ColorOS, but this is VERY promising !!!
IMEI is correct, it's the one on the box !
Still no WiFi nor Bluetooh mac addresses, though...
Will keep you posted, but this is a HUGE step forward !
Thanx a lot for sharing this !
BTW, serial number is still unchanged and correct.
JP.
EDIT:
Unfortunately it didn't fix my issue, back to CM11S I am greeted by an AudioFX FC... Device pretty much unusable, the FC pops up the milisecond you click OK ...
Will try a different ROM...
EDIT 2:
SlimKat, CM11 Nightly both boot to the welcome screen, then reboot about 1 second later.
Only ColorOS seems to actually run ?!
A bit disgusted right now
Click to expand...
Click to collapse
Im having the same problem as you have Yank555. It started with the AudioFX FCs rendering the device useless.
Next i tried to reflash the standard CM11s 25R rom back to get my phone normal again, it didnt work.
Then i remember i have a nandroid from a few days ago. Not thinking to read up on known issues with the OPO EFS i tried a restore.
My EFS is gone and the phone will not work unless im on ColourOs120. Wifi doesnt work, just basic phone functions.
Still waiting for a miracle for this problem.
Any suggestion guys?
jwai85 said:
Im having the same problem as you have Yank555. It started with the AudioFX FCs rendering the device useless.
Next i tried to reflash the standard CM11s 25R rom back to get my phone normal again, it didnt work.
Then i remember i have a nandroid from a few days ago. Not thinking to read up on known issues with the OPO EFS i tried a restore.
My EFS is gone and the phone will not work unless im on ColourOs120. Wifi doesnt work, just basic phone functions.
Still waiting for a miracle for this problem.
Any suggestion guys?
Click to expand...
Click to collapse
Did you open a service request ? Any response ? So far all I got 5 days later was a "please fastboot flash factory images, case closed." which quite obviously did not help, so case reopened, but again nothing from them in 4 days, now.
But I wonder if my first thought is still correct, flawed emmc as flashing seems to work ... might be a radio hardware issue ? Just don't quite get what the AudioFX has to do with that... cause simply rooting the device and installing apps and making a few nandroid backups is no way to brick anything.
But anyway, tbh, OnePlus is mostly dead to me as a company, worst invest ever so far, nice if your device works, but service is not even close to bad, it's pretty much non-existing ... and for a supposedly "best service ever" it's quite, let's say, "impressing"
JP.
Nope, i have not tried opening a ticket, mine is a grey import from China.
There is something terribly wrong somewhere hardware wise. The audiofx problem only happens if i flash the CM11s. After ColourOS i have tried flashing the CM11 M8.
Im also wondering if i should try to use this OPO made rom to see if it can help.
https://forums.oneplus.net/threads/rom-official-4-4-4-oneplus-aosp.65482/
jwai85 said:
Nope, i have not tried opening a ticket, mine is a grey import from China.
There is something terribly wrong somewhere hardware wise. The audiofx problem only happens if i flash the CM11s. After ColourOS i have tried flashing the CM11 M8.
Im also wondering if i should try to use this OPO made rom to see if it can help.
https://forums.oneplus.net/threads/rom-official-4-4-4-oneplus-aosp.65482/
Click to expand...
Click to collapse
Give it a go, not much to lose. Didn't work for me, though.
JP.
Sent from my Nexus 5 running stock rooted AOSP on Yank555.lu v1.0-alpha5 kernel.
This worked for me! I'm back in business! Thanks guys for getting this figured out, I thought my phone was done.
I hate to bring this back up.
I have a Nandroid of my stock CM11S on my phone. I used it for the update to 300 to get firmware, then made a backup of it and went back to the custom Rom I had been on.
Today, I went and restored the backup of CM11S to sideload the newest update. Weirdly, after restoring I have an unknown baseband. But if I go back to the custom Rom backup I still have a baseband.
I wonder if TWRP just didn't backup the correct partitions? I am on the offficial TWRP. But I do have a backup that contains my EFS backup from the other TWRP that has that option.
I think I know what corrupted my efs....I used the official twrp 2.7.1.1 which for some reason saves modemst1. I remember restoring st1 when I corrupted it the first time with the official 2.7.1.1. Well I did it again trying to restore a nandroid with the official twrp 2.7.1.1. Do not restore the saved modemst1 from the official twrp 2.7.1.1. You will encounter problems.
So, this same thing happened to me...i happily using 30O and not really any issues and getting good battery life~17 hrs w/moderate use. And no other bugs.
Found the 33R update here on the forums and downloaded it and flashed through TWRP.
Thats when trouble found me, lost network and wifi stuck trying to turn on but never finds wifi. Then reading through xda someone suggested to check IMEI and it was gone. I had NOT done any prior back ups other than Nandroid prior to flashing update.
Restore still didn't fix it.
I tried this (flash ColorOS and CM11) but still didnt fix it. I was bummed as my OPO is very new and I had been happy with it.
CM11 or by restore, windows will not detect it even with drivers loaded. Flashing colorOS would allow windows XP to recognize internal and allow me to send files so i tried custom ROMs and CM stock and Mahdi but none worked. Luckily my TWRP still works and i am able to boot and get into fasboot.
I finally got mine fixed with rooted stock 33R from here on xda!
Now my OPO is back in business!!!
Save st1 and st2 with vonnegut's method http://forum.xda-developers.com/showthread.php?p=54623075.. Put it in a safe place for later. I uploaded them to google drive and onedrive . It saved me today.
For those of you that were able to recover, did you lose your entire EFS folder? Mine is completely gone and I don't think this ColorOS trick works either. I've tried it all last night and I fell asleep at my desk

[Q] Failed recovery of nandroid backup - why???

Hi all,
Some time ago i asked, and received, some support on these forums on how to properly carry out a nandroid backup... following the sound advice i got, i carried out my backup (using TWRP for the record, with all the options checked), and stored it away for a rainy day... said day came yesterday, when i messed up my system and rendered it instable (i tried to manually delete the dalvik cache directory in order to free up the 2,5GB of space it was taking)... since i knew there was i high chance of this ending in disaster, the last thing i did before the delete was carry out another nandroid, so i could easily return to where i had left off... how wrong i turned out to be
as soon as i the system became instable following my experiment of deleting the d. cache directory, i recovered the latest nandroid (i.e. the one i had made just hours before) and everything seemd to go smoothely until the first reboot... when the following happened:
- first reboot after recovery took ages, much like the first reboot following the flashing of a new rom... not the end of the world, but that was the first sign that all was not well
- the status bar disappeared, and there was no way of making it come back (i.e. nothing to do with the launcher, i typically use apex but i i tried switching to both nova and touchwiz which i also kept up to date but the stats bar was nowhere to be seen)
- even if not having a status bar with all the info on it is acceptable (which of course it isn't, but lets just say), the sytem became completely instable after 5minutes of operation... with each app taking turns to shutting down until i kept getting the message "system UI has closed" over and over, to the point that doing a reboot was challenging since i barely had the time to press on the screen between instances of this bloody error message appearing...
...i did of course try and return to my older nandroid backup, but... lo and behold... exactly same behaviour...
so now i have resorted to formatting the internal memory card and flashing a new rom and basically starting over... just what i hope the nandroid would spare me basically :/
question is: does this sort of error sound familiar to anyone? can someone give me a tip maybe on what i may have done wrong?
any opinion, tips& advice much appreciated
I have the exact same problem. It happens on TW Lollipop ROMs. Haven't found a fix. I'm using Philz Touch Recovery and the old no knox bootloader.
Anyone? I have researched this but cannot find any similar problems reported... it can't just be me and pavelcheto...
Maybe it a recovery fault. Faulty backup or faulty restore.
No problems with my older backups. I restored my KitKat TW backup, working fine. Restoring CM12 backups also works fine. I've looked for a new recovery, Philz is discontinued, CWM hasn't been updated for a year and I really don't like TWRP.
I use TWRP 2.8.3.0 and never have (and hopefully never will) encountered any issues with restoring backups.
Considering i recovered 2 separate backups for a total of 3 times (i tried recovering the first backup twice) i doubt the issue was with the recovery itself... however since pavelcheto had no issues with the kk recovery maybe it could be lollipop related?
Anyone successfully recovered a lollipop nandroid backup?
platypus78 said:
Considering i recovered 2 separate backups for a total of 3 times (i tried recovering the first backup twice) i doubt the issue was with the recovery itself... however since pavelcheto had no issues with the kk recovery maybe it could be lollipop related?
Anyone successfully recovered a lollipop nandroid backup?
Click to expand...
Click to collapse
I recovered my lollipop gpe backup a couple of times without a problem.
Data encryption may cause restoring problems.
I have restored CM12 backups (based on 5.0.2) serveral times, no problem there. I've had issues only with TouchWiz Lollipop ROMs, I have tried different custom roms, all get bugged at restore.
pavelcheto said:
I have tried different custom roms, all get bugged at restore.
Click to expand...
Click to collapse
Just to make sure I understand correctly : you mean all TW custom roms you've restored have had problems?
Wonder if anyone else has managed a bug-free restore of a 5.x TW?
Yes, but only on Lollipop. KitKat TW roms restore just fine. I am using Philz Touch Recovery. I have tried 3 different TW Lollipop roms and they all fail to restore properly. No wallpaper, black wallpaper and no status bar. And after a minute or two System UI starts crashing. If then I do factory reset from recovery and the rom starts normally (welcome guide and stuff) and works fine.
bumping this thread because i cant seem to find a solution for this anywhere.
TheAwesomeBit said:
bumping this thread because i cant seem to find a solution for this anywhere.
Click to expand...
Click to collapse
There's no solution for this as per comments above. TW LP is not restorable. You can flash a new lollipop ROM tho'
Sent from my GT-I9505

Mi A1 IMEI null

So this was going to be a pretty easy flash from a Custom rom to the stock rom through Fastboot. But instead, the phone booted up on stock, but wifi was gone. Didnt know what to do, flashed again using another build of stock rom, but by mistake, selected factory flash. It went wrong but didnt even realise that everything was erased. flashed again using clean all and lock. The phone kept restarting. Restored the Persist Image through terminal in TWRP. Wifi is working but IMEI and G Sensors are gone. Please help. Ive tried qcn but its all too complicated. Thanks
Not sure how to fix this, but just google it, you will find several guides to restore IMEI, ex. I found this one, maybe it helps. https://www.digitbin.com/restore-lost-imei-number-android/
hmm
https://forum.xda-developers.com/mi-a1/help/repair-imei-mi-a1-links-updated-t3756891

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