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[Solved] OTA update fails on Yoga Tab 2 1050F

Hi,
i have the Yoga Tab2 1050F. The last OTA update fails to install.
I am currently on S100067_1507101258 and the update is for S100196_1511230539.
All earlier OTA's installed fine. I had my Tab rooted, but i unrooted it before installing the OTA update.
I also did a factory reset, the update still fails.
I only get an "Error" on the display with the tilted android avatar.
I saved the last OTA file, which is around 50MB large.
I also tried an update via the internal sd and the external sd card. None of these helped.
Can anyone help find the cause and help me install the latest update?
Regards
Jay

jayp57 said:
Hi,
i have the Yoga Tab2 1050F. The last OTA update fails to install.
I am currently on S100067_1507101258 and the update is for S100196_1511230539.
All earlier OTA's installed fine. I had my Tab rooted, but i unrooted it before installing the OTA update.
I also did a factory reset, the update still fails.
I only get an "Error" on the display with the tilted android avatar.
I saved the last OTA file, which is around 50MB large.
I also tried an update via the internal sd and the external sd card. None of these helped.
Can anyone help find the cause and help me install the latest update?
Regards
Jay
Click to expand...
Click to collapse
the thing is that not always the 'unroot' works for doing a system update, the unroot (have you performed the full one?) could leave behind modified binaries or maybe apps you installed have did that (for eg if you installed busybox it will leave the new binary) and the first step of the OTA update is to do a check of all the files that are going to be updated (patched) and if one of them doesn't match the sha1 checksum the update will abort (will not change anything on your tab when aborting). you can fix it by:
1. (complicated) restore the orginal files (you can check the recovery log on your cache partition to see where it failed)
2. (recommended) flash a stock rom matching your existing Android (you are on lollipop so you can use this for a stock lollipop install)
ps. factory reset doesn't save, that one just erases 'data' partition, has nothing to do with the ota (that usually updates files on the 'system' one or the 'boot/recovery/fastboot' partitions)

Thanks ionioni for your answer.
I don't want to flash a stock rom, that is not OTA. Just for security reasons. This would be my last resort.
I prefer to "repair" it. I am familiar with your tmp-root tool.
Do i have to mount something when i am in tmp-root, to search the su root files?
I think they reside in /system/lib and /system/bin.
Regards
Jay

jayp57 said:
Thanks ionioni for your answer.
I don't want to flash a stock rom, that is not OTA. Just for security reasons. This would be my last resort.
I prefer to "repair" it. I am familiar with your tmp-root tool.
Do i have to mount something when i am in tmp-root, to search the su root files?
I think they reside in /system/lib and /system/bin.
Regards
Jay
Click to expand...
Click to collapse
if you start with tmp_root it will open an early adb shell as root (regardless of whether your tab was or not rooted)
check after you shell in to see if the /cache is mounted (input a simple mount) and if it is not you need to mount it
afterwards you will need to go and do an adb pull on your recovery log (if i recall is on /cach/recovery ) and check inside to find on what did the ota failed
however this is cumbersome and even if you find on what it fails you still will have to find the original files (and after you try to OTA again it can fail many more times on other files as the OTA is aborted on the first non matching file and if there are many you will need to repeat these steps over again). i never did this, i am just saying that it could be done, but why would one waset maybe hours just so he can bring his system back to the same state it could bring in 3 minutes by flashing a stock rom? but if you want the complicated way feel free
if i were you i would just flash the stock rom in 3 minutes (that is how long it takes) and move along
what security reasons you are talking about?

I am just carefull. The images might be tampered.
But i get your point. It might get cumbersome to fix each file.
I'll try your method and flash the lollipop image.

jayp57 said:
I am just carefull. The images might be tampered.
But i get your point. It might get cumbersome to fix each file.
I'll try your method and flash the lollipop image.
Click to expand...
Click to collapse
oh, i see... i doubt they are tampered by anyone (except Lenovo of course ) the files i provide have already been used by others (and if they were to be tampered they would have failed future OTA's, the boot image is checked and it won't load if modified etc)
as a personal thought, to tamper a stock rom (to whatever purpose one would want) so that they cannot be detected by a future ota requires a level of knowledge that i think keeps us safe (i think one who is able to do such a thing would not 'waste' his time and resources on doing it to a normal/casual user like we are), so if you are able to take ota's you can safely assume that the files are the ones Lenovo put in there (not to say that Lenovo could not do funny things tho)
i wish you to become so important that one day this could be a real concern

yeah you are right.
thanks for your support. i managed to update my tablet.

Hi. I have the same problem. Did you have flash lollipop firmware again ? the ota works ?
Do you know where to get lollipop firmware for 1050F ? in all-in-one subject there is only kitkat firmware for 1050F.
Thank you.

saupiquet said:
Hi. I have the same problem. Did you have flash lollipop firmware again ? the ota works ?
Do you know where to get lollipop firmware for 1050F ? in all-in-one subject there is only kitkat firmware for 1050F.
Thank you.
Click to expand...
Click to collapse
the link is in my first reply here

BTV-W09C100B303 firmware

Could anyone please provide me with the BTV-W09C100B303 firmware or a download link? Need to reflash it as I have deleted some apps which I shouldn't have. Thank you

BTV-W09C100B303 - FullOTA-MF-PV
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G2005/g1719/v108302/f1/full/changelog.xml
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G2005/g1719/v108302/f1/full/update.zip
http://update.hicloud.com:8180/TDS/...8302/f1/full/hw/eu/update_data_full_hw_eu.zip
i hope you know how to flash this. if not reply. i could write a working method tomorrow.

Thank you for providing me with the links. Unfortunately, before I saw your post I messed it all up and have currently no OS installed. I can, however, enter TWRP and my last hope is that someone can provide me with a (clean) Nandroid backup (and shares it in some cloud storage) which I can restore via TWRP to save my device.

You can always rollback to MarshMallow, root it again and then continue from there.

paratox said:
BTV-W09C100B303 - FullOTA-MF-PV
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G2005/g1719/v108302/f1/full/changelog.xml
http://update.hicloud.com:8180/TDS/data/files/p3/s15/G2005/g1719/v108302/f1/full/update.zip
http://update.hicloud.com:8180/TDS/...8302/f1/full/hw/eu/update_data_full_hw_eu.zip
i hope you know how to flash this. if not reply. i could write a working method tomorrow.
Click to expand...
Click to collapse
I would like to know the best way to flash these. I have BTV-W09C100B302 uk with twrp and rooted with supersu. Firmware finder downloads latest but it fails on update.

P9 lite vns-l31 update from b 360 to b392 help needed

I have already unlocked and rooted my vns-l31, installed c185b360 also installed revolution recovery
I received an OTA update through system update B392
I downloaded it through system update
It's 3 zip files in Hwouc folder in sd card:
Update.zip
Update_data_full_public.zip
Update_full_vns-l31_hw_meafnaf.zip
What should I do?
It enters revolution recovery and it doesn't install the image and returns error
Should I try 3button method? And how to flash all the 3 zip files
Help me please
Thanks

Hello @thefarhad,
sorry if i write this but "it seems" you already know what you should do,
also it does not seem possible that update has arrived that way,
i mean official updates automatically installs..
It seems instead that you have downloaded it with Firmware Finder (full OTA-MF), isn't it ?
(If i'm wrong please just not consider this post...)
Now try to follow guide "how to update" you find here on XDA.. (use search, there is more than one).
My little suggestion: proceed by little steps like installing B380 first, then check if official one arrive, if not install B392 with FF.
P.S.: Read threads more than one time before doing anything, just in case something could escape you... only a friendly suggestion..
Regards

Oneplus 5 Update fails

Hello everyone,
For a while now, I have been delaying this, because I can't afford to lose the content that I have on this device
I have a Oneplus 5 OxygenOS 5.1.4 release that I can't install. Everytime I do, it just fails, and reboot. A while after, I have a new notification telling me that the update is available
My phone is not rooted but I think the bootloader is unlocked. TWRP isn't installed either
Is there any way for me to easily update my phone witout risks of losing what I have on it ? Might be a dumb question, but I'm a huge noob
Thansk a lot for your help

Mouchoir said:
Hello everyone,
For a while now, I have been delaying this, because I can't afford to lose the content that I have on this device
I have a Oneplus 5 OxygenOS 5.1.4 release that I can't install. Everytime I do, it just fails, and reboot. A while after, I have a new notification telling me that the update is available
My phone is not rooted but I think the bootloader is unlocked. TWRP isn't installed either
Is there any way for me to easily update my phone witout risks of losing what I have on it ? Might be a dumb question, but I'm a huge noob
Thansk a lot for your help
Click to expand...
Click to collapse
Do you get the bootloader unlock warning message at boot? Is the device new or used? You want to update from 5.1.4 to 5.1.5 with ota right? Does the ota download 1.7GB or detect root before downloading?

Hello strongst and thanks for your answer
The phone is old but it's always been mine. I rooted it a while back but I reinstalled everything, which is why the bootloader is unlocked even tho the phone isn't rooted.
I do have the warning message when I boot
I'm trying to update with OTA indeed. When I do so, it downloads the update, reboots, and then I get this :
"Instaling, please wait..." and a few seconds after "Installation failed"
Then I just rebot the phone and everything is back to its initial state

strongst said:
Do you get the bootloader unlock warning message at boot? Is the device new or used? You want to update from 5.1.4 to 5.1.5 with ota right? Does the ota download 1.7GB or detect root before downloading?
Click to expand...
Click to collapse
You did not answer all questions, so I only can guess...
Mouchoir said:
Hello strongst and thanks for your answer
The phone is old but it's always been mine. I rooted it a while back but I reinstalled everything, which is why the bootloader is unlocked even tho the phone isn't rooted.
I do have the warning message when I boot
I'm trying to update with OTA indeed. When I do so, it downloads the update, reboots, and then I get this :
"Instaling, please wait..." and a few seconds after "Installation failed"
Then I just rebot the phone and everything is back to its initial state
Click to expand...
Click to collapse
I'm guessing it downloads partial ota and not a full rom like about 1,7GB so the update fails. In case you have twrp you can easily download the 5.1.5 FULL zip from here and flash it https://forum.xda-developers.com/oneplus-5/how-to/oneplus-5-mirrors-official-oxygen-os-t3628190

I am sorry that my answer wasn't complete.
- I do have the bootloader message
- The device is a year old, but only used by me
- It's trying to download 5.1.4 OTA which is 1609MB. It downloads everything and tries to install it
- No root is detected
- I don't have TWRP on the phone
Thanks for your answers

Best way it simply install latest TWRP like Sian, do a dirty flash with the full OOS Rom package (5.1.7) for force update.
1/ Do a full backup of your data / sms / pictures on your computer (just for be sure, you must always backup for big changes, especially with encrypted roms)
2/ install TWRP Sian
3/ On TWRP > Wipe > Dalvik/ART - Cache paritions
4/ Install > the latest stable OOS 5.1.7 Rom
5/ Just after that flash Magisk (if you want keep the custom recovery) or don't flash Magisk (stock recovery will erase TWRP after SetupWizard)

Hello Pho3nX, thanks for your answer.
I tried to figure out what "TWRP Sian" is, but I couldn't find anything. I found this one : https://twrp.me/oneplus/oneplus5.html and I'm planning on following the "Fastboot Install Method". Is that OK ?
Do you recommand me to flash Magisk ?
Thanks a lot

Mouchoir said:
Hello Pho3nX, thanks for your answer.
I tried to figure out what "TWRP Sian" is, but I couldn't find anything. I found this one : https://twrp.me/oneplus/oneplus5.html and I'm planning on following the "Fastboot Install Method". Is that OK ?
Do you recommand me to flash Magisk ?
Thanks a lot
Click to expand...
Click to collapse
This : [RECOVERY] TWRP-3.2.3 with Pie decryption support [experimental]
And yes i advise to install Magisk for keep TWRP & tools / root, permit using useful root app like Titanium/Theme/Adaway/Explorer etc...

Pho3nX said:
This : [RECOVERY] TWRP-3.2.3 with Pie decryption support [experimental]
And yes i advise to install Magisk for keep TWRP & tools / root, permit using useful root app like Titanium/Theme/Adaway/Explorer etc...
Click to expand...
Click to collapse
Hello
I'm back Thanks for your answer. However, there is no explaination on how to use the .img I've downloaded. Could you point me to some instructions ?
Sorry I'm not good at this stuff

Mouchoir said:
Hello
I'm back Thanks for your answer. However, there is no explaination on how to use the .img I've downloaded. Could you point me to some instructions ?
Sorry I'm not good at this stuff
Click to expand...
Click to collapse
If you have no twrp already installed on your device you must flash the twrp.img file with fastboot like "fastboot flash recovery twrp.img"

Hello,
You haven't heard from me because I wait to be at home so I can safely follow your instructions.
I just saw a news about Android Pie 9.0 beta being released for Nexus 5.
Pho3nX said:
4/ Install > the latest stable OOS 5.1.7 Rom
Click to expand...
Click to collapse
Would it work if I download it instead of the one you sent me ?
Thanks a lot

Mouchoir said:
Hello,
You haven't heard from me because I wait to be at home so I can safely follow your instructions.
I just saw a news about Android Pie 9.0 beta being released for Nexus 5.
Would it work if I download it instead of the one you sent me ?
Thanks a lot
Click to expand...
Click to collapse
Error 7 for me i tried i'm with unlocked bootloader latest TWRP by Eng.stk and i removed form the zip also compatibility.zip

Hello,
I finally managed to install the zip thanks to TWRP, but it seems that my cellphone is stuck on the boot turning logo with the two red dots turning around the big red one

Fixed : https://forum.xda-developers.com/oneplus-5/help/bricked-oneplus-5-t3884364

Please help me with an OTA update

Hi everyone. I'm new here on XDA and this is my first post so if I'm doing this wrong, please let me know below or provide a link if my problem has already been solved, thank you.
I have an s8+(SM-G955F, dream2ltexx/dream2lte), running 9.0.0. I have both, TWRP(3.3.1) and Magisk(latest) + edxposed(for what is worth). I am also running a custom kernel A2N. I received a week ago an OTA update and I would like to apply it. This is my first ever OTA update on a rooted device so I read a ton of posts and tutorials in the past few days, also backed up everything using TWRP. From what I understood(and please feel free to correct me if I'm wrong or show a better solution) I need to first install the default recovery image, lose TWRP, unroot, do the OTA and after that, reinstall TWRP and Magisk(I think I also need to return to stock kernel, not sure).
Important: I would very much like to not factory reset my phone if this is possible.
Now, I have a few questions:
1. Where can I get my default recovery.img ? (I tried to find it on https://desktop.firmware.mobi/device:468 but they don't have anything for android 9)
2. Do I also need to get and install my default kernel ? If so, where can I also get it ?
2. After I flash the recovery.img what is the best thing to do with Magisk ? (completly uninstall or just restore image ?)
3. After everything is done, will flashing TWRP require to remount the partitions ?(because that will also mean I have to factory reset at some point)
4. It would also be super helpful if you could provide me a link from where I can download OTA updates as zip files(if there exist such a place). The version that I need is: G955FXXS8DTC1
I cannot thank you enough for everything and sorry for the long post
Hope you have a safe, beautiful day !
P.S. I already tried to do the OTA update after backup. It tried to flash it throw TWRP and, of course, it failed(error: 7)