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A2017 B11 boot.img - request for help

Hi there,
Made a stupid mistake not backing up before proceding with root without bootloader unlock and installed B10 file onto B11 kernel, and now I have no wifi. Is there any place where I can find B11 boot.img? I don't care about root at this point anymore.
Thank you

jedruch said:
Hi there,
Made a stupid mistake not backing up before proceding with root without bootloader unlock and installed B10 file onto B11 kernel, and now I have no wifi. Is there any place where I can find B11 boot.img? I don't care about root at this point anymore.
Thank you
Click to expand...
Click to collapse
Go here and download the full update.
http://forum.xda-developers.com/axon-7/development/axon-7-chinese-stock-roms-t3436817
You can grab anything you want from there.

[Chinese]Question re: extracting 7.1.1 modem

Since the 7.1.1 update for chinese a2017 isn't full update file, can we extract the modem from it?
I want to convert my unit to US version using miflash method and I have already done this before but I get problems with signal even after flashing chinese modem from LOS thread by @Unjustified Dev. Although, this signal problem is quite specific with my carrier since I get a stable OS and signal using a different carrier/sim.
I'm thinking about doing it via twrp. Here are the steps I had in mind:
1. From b13, update to 7.1.1 via stock recovery.
2. after finishing setup of 7.1.1, I'll install twrp via fastboot.
3. back up everything in twrp.
4. miflash full b15 US version and twrp.
5. restore modem from twrp from my backup.
Do you think this will work? Or not, since B15 isn't 7.1.1?
Hopefully devs here can also share their thoughts. @ @DrakenFX @Oki @jcadduono
Thanks!
BTW, I attached a pic of what's inside the 7.1.1 update including the contents of patch folder.

otaconremo said:
Since the 7.1.1 update for chinese a2017 isn't full update file, can we extract the modem from it?
I want to convert my unit to US version using miflash method and I have already done this before but I get problems with signal even after flashing chinese modem from LOS thread by @Unjustified Dev. Although, this signal problem is quite specific with my carrier since I get a stable OS and signal using a different carrier/sim.
I'm thinking about doing it via twrp. Here are the steps I had in mind:
1. From b13, update to 7.1.1 via stock recovery.
2. after finishing setup of 7.1.1, I'll install twrp via fastboot.
3. back up everything in twrp.
4. miflash full b15 US version and twrp.
5. restore modem from twrp from my backup.
Do you think this will work? Or not, since B15 isn't 7.1.1?
Hopefully devs here can also share their thoughts. @ @DrakenFX @Oki @jcadduono
Thanks!
BTW, I attached a pic of what's inside the 7.1.1 update including the contents of patch folder.
Click to expand...
Click to collapse
Any idea if this worked?
Also will the Chinese modem from the lineage OS thread work with the latest 7.1.1 update

Is it possible to install european modem on chinese variant? And do I need to unlock bootloader?

Fuilares said:
Is it possible to install european modem on chinese variant? And do I need to unlock bootloader?
Click to expand...
Click to collapse
You could but you probably won't have any signal, might even break wifi.
Modem/bootstack need to match device.

b25 Update

I have a new (3 day) that updated to b25. Was and is totally stock. Not happy.
Mar was way better on battery and performance. I have downloaded and renamed
b15 factory ota and placed in the sdcard. System update reports a valid update but before I
commit to doing this I wanted to verify with the community that it is safe to do.
After I do this update I am wondering if I can find a factory ota of mar if I can do the same thing again.
Thanks in advance

2CanSan said:
I have a new (3 day) that updated to b25. Was and is totally stock. Not happy.
Mar was way better on battery and performance. I have downloaded and renamed
b15 factory ota and placed in the sdcard. System update reports a valid update but before I
commit to doing this I wanted to verify with the community that it is safe to do.
After I do this update I am wondering if I can find a factory ota of mar if I can do the same thing again.
Thanks in advance
Click to expand...
Click to collapse
It's really simple actually: if you install B15 your data will be wiped, after that just skip everything and update to B29 (is B29 the latest? I have a G, dunno) and then use it. What you describe is not the actual performance that it should have, it's your specific case obviously.

I know what you want to do - if you want to remain TOTALLY STOCK I think you are out of options as I don't know anywhere that you can still download the stock ZTE B29 marshmallow. If you are willing to unlock your bootloader and install TWRP then somewhere in here DrakenFX has a B29 rollback that works great - it just won't work with stock recovery

tabletalker7 said:
I know what you want to do - if you want to remain TOTALLY STOCK I think you are out of options as I don't know anywhere that you can still download the stock ZTE B29 marshmallow. If you are willing to unlock your bootloader and install TWRP then somewhere in here DrakenFX has a B29 rollback that works great - it just won't work with stock recovery
Click to expand...
Click to collapse
All I really want is to remain stock but rooted and with TWRP for recovery for Nandroid backups. The B25 will not let me unlock the bootloader with Fastboot and when running MiFlash the phone is visible but getting "Hello packet error" I have read another method with fastboot but have not tried it yet (below). Somewhere I read that B25 was the problem and you had to downgrade and the MiFlash method was recommended.
adb reboot bootloader
fastboot devices
fastboot oem unlock
fastboot reboot
I did everything but the first entry.
Thanks for any suggestions.

2CanSan said:
All I really want is to remain stock but rooted and with TWRP for recovery for Nandroid backups. The B25 will not let me unlock the bootloader with Fastboot and when running MiFlash the phone is visible but getting "Hello packet error" I have read another method with fastboot but have not tried it yet (below). Somewhere I read that B25 was the problem and you had to downgrade and the MiFlash method was recommended.
adb reboot bootloader
fastboot devices
fastboot oem unlock
fastboot reboot
I did everything but the first entry.
Thanks for any suggestions.
Click to expand...
Click to collapse
Go ahead with your rollback to B15 - that will let you unlock and install TWRP. Once you have TWRP go to this thread https://forum.xda-developers.com/axon-7/development/rom-guide-updates-to-stock-files-via-t3469484 and in post #2 you will find A2017UV1.0.0B29_RollBackModded.zip. Flash that, then flash TWRP again (you have to flash TWRP again ONLY if you want to keep TWRP as this flash file will automatically reinstall stock recovery). Also note on B29 I had to use SuperSU 2.65 (not the current one) for root.

tabletalker7 said:
Go ahead with your rollback to B15 - that will let you unlock and install TWRP. Once you have TWRP go to this thread https://forum.xda-developers.com/axon-7/development/rom-guide-updates-to-stock-files-via-t3469484 and in post #2 you will find A2017UV1.0.0B29_RollBackModded.zip. Flash that, then flash TWRP again (you have to flash TWRP again ONLY if you want to keep TWRP as this flash file will automatically reinstall stock recovery). Also note on B29 I had to use SuperSU 2.65 (not the current one) for root.
Click to expand...
Click to collapse
By the system update.zip method?
Thanks
Also I would be happy to stay at b15 with TWRP and root.

2CanSan said:
By the system update.zip method?
Thanks
Also I would be happy to stay at b15 with TWRP and root.
Click to expand...
Click to collapse
Wait - you wanted to stay stock? You didn't actually have to unlock if you wanted to. Just by using the update.zip method with some Marshmallow zip you could get to MM, and then you can update to N and you surely won't get the same problems that you've been having...
For example my G is on 7.1.1 and I get 6h+ of battery (right now, 3h36m with 41% left) so your problem is just that your installation was bad. If you unlocked you might as well just do the process that the guy above described though.

2CanSan said:
By the system update.zip method?
Thanks
Also I would be happy to stay at b15 with TWRP and root.
Click to expand...
Click to collapse
Choose an username... said:
Wait - you wanted to stay stock? You didn't actually have to unlock if you wanted to. Just by using the update.zip method with some Marshmallow zip you could get to MM, and then you can update to N and you surely won't get the same problems that you've been having...
For example my G is on 7.1.1 and I get 6h+ of battery (right now, 3h36m with 41% left) so your problem is just that your installation was bad. If you unlocked you might as well just do the process that the guy above described though.
Click to expand...
Click to collapse
OK on the A2017U units you need the official marshmallow B29 package to roll back, and that only works with stock recovery on a clean B15 N install. The Rollback package I told you to use earlier will roll you back to B29 marshmallow NO MATTER WHAT YOU ARE USING (I have used this a lot, and OBVIOUSLY there are differences between the the A2017U version in North America and the A2017G version in Europe). If you want stock and rooted, I personally recommend B29 marshmallow over B15 Nougat, but either way go for it (I think the marshmallow had a much better radio than any of the Nougat packages). If you are interested in TWRP and root, I found B29 marshmallow much easier for both, and the marshmallow version of android also gives you Xposed, but back to your first post, you mentioned wanting marshmallow, and this is the best way to get it.
Step by Step method
1. Roll back to B15. Use the update.zip method. It will factory reset your device so backup everything you can't lose
2. Use MiFlash to unlock and install TWRP - check that thread on XDA for instructions.
3. (If desired) In TWRP, install the B29 marshmallow rollback. Do not reboot into system afterwards.
4. (If step 3 is done) In TWRP, flash TWRP. The marshmallow rollback will overwrite recovery with stock recovery
If you do this you will have exactly what you wanted in your original post. I can personally tell you this works, as I have tried every custom rom on here and always wind up back at B29 marshmallow when all is said and done. It has never failed me, and it will never fail you either.

OTA Android 6.0 B27 --> B29 Aboot error

Trying to flash the ota that brings me from B27 to B29 (Android 6.0, M) so I restored my system image and the boot partition. I have not touched any other partitions since I unlocked my bootloader using this guide: https://forum.xda-developers.com/axon-7/development/axon7tool-flash-backup-boot-recovery-t3514254 and then this guide https://forum.xda-developers.com/axon-7/how-to/guide-how-to-unlock-bootloader-stay-t3461165
I flashed the correct stock recovery for B27 (removing twrp) and tried to upgrade to B29 via the settings menu once the phone booted up into Android. The recovery log spits out an error message along the lines of:
"contents of partition ... aboot didn't match EMMC ... doesn't have any of expected SHA1 sums. Script aborted: partition aboot has unexpected contents"
"Failed to stat /cache/saved.file: no such file or directory"
"failed to load cache file"
"script aborted"
Any idea what I'm doing wrong or anything else I need to fix beforehand?

Isn't B29 Nougat?

@supergear I believe its still Android 6.0

skyguy126 said:
@supergear I believe its still Android 6.0
Click to expand...
Click to collapse
I still don't understand the U's updates... I think there are both B29 M and N.
I still think ZTE should've used M29, and N29, then O01... Much more understandable than this crap
Try using MiFlash. The good thing about it is that you can use it even if you have half of the phone... Just put it on EDL, and use the corresponding FULL EDL package (DO NOT use the A2017 or A2017G's!!}

@Choose an username... will give it a go and report back; thanks! It doesn't lock the bootloader right?

skyguy126 said:
@Choose an username... will give it a go and report back; thanks! It doesn't lock the bootloader right?
Click to expand...
Click to collapse
Nothing locks the bootloader but the command (oem lock). But don't use it unless your device is totally, COMPLETELY stock (stock recovery, stock system, stock BL).

How did you get on B27 in the first place? If you used a TWRP image or flashable zip to get there the OTA won't work (at least it never did for me).

Ok

@tabletalker7 came installed with the phone, US version.

skyguy126 said:
@tabletalker7 came installed with the phone, US version.
Click to expand...
Click to collapse
OK I just read up on how you unlocked and got TWRP. Have you considered backing up your info and just using a TWRP version of B29?

@tabletalker7 where can I find the zip file, as of now the only zips I am finding are for B20 and B27 (Marshmallow) and the Nougat ones.

skyguy126 said:
@tabletalker7 where can I find the zip file, as of now the only zips I am finding are for B20 and B27 (Marshmallow) and the Nougat ones.
Click to expand...
Click to collapse
https://forum.xda-developers.com/axon-7/development/rom-guide-updates-to-stock-files-via-t3469484 post #2 has a b29 rollback file there. Flash it in TWRP, then flash TWRP again.

I want to rollback from oreo A2017U

Hey everyone! i want to roll back to oreo since it has support for my language.
How can i do so? i use the a2017u
i just download the b35 nougat package and flash it trough recovery?
thanks a lot!

Igorperrotta said:
Hey everyone! i want to roll back to oreo since it has support for my language.
How can i do so? i use the a2017u
i just download the b35 nougat package and flash it trough recovery?
thanks a lot!
Click to expand...
Click to collapse
roll back to Oreo? What are you running right now then?
If you mean roll back to Nougat then yeah, just download the official b35 package, get the update.zip from inside the zip, and put it in the root of the internal storage, then go to Updates and it should appear
If it doesn't put it in an SD card and install it from the recovery
Also, G Oreo probably has support for your language, if you want to stay on stock+ firmware just flash oreo B03 from the G, but remember to flash the U modem

Choose an username... said:
roll back to Oreo? What are you running right now then?
If you mean roll back to Nougat then yeah, just download the official b35 package, get the update.zip from inside the zip, and put it in the root of the internal storage, then go to Updates and it should appear
If it doesn't put it in an SD card and install it from the recovery
Also, G Oreo probably has support for your language, if you want to stay on stock+ firmware just flash oreo B03 from the G, but remember to flash the U modem
Click to expand...
Click to collapse
Hey, I'm having the same problem when I try to roll back from Oreo. I tried putting the update.zip in both internat and external storage but the updates just fails, even from recovery.

bieljacintho said:
Hey, I'm having the same problem when I try to roll back from Oreo. I tried putting the update.zip in both internat and external storage but the updates just fails, even from recovery.
Click to expand...
Click to collapse
Try enabling USB debugging, I don't recall if it was needed or not for the recovery update but it might be. If it fails you'll have to go EDL Tool, simply get it from the ROMs, kernels, development section and also download the B35 EDL package from there. Flash the package and you're done.