[Huawei MediaPad X2] under-developed:
OK, an update on progress from GEM-702/B006; I think I am nearly there ! (I have got to step 4a but stuck here - I did do the steps in part 3 as going straight from 2 to 4 wasn't working for me)

I eventually managed to flash the B112 system and userdata files as well as the boot and recovery.

Not sure how it happened but one thing I wondered about was that maybe this refusing to flash files was what an unrooted phone might do, so I reflashed superSU about 3 times at points along the way, just to make sure it was always active. (I also went to developer options a few times and made sure I told it to allow mock locations and stopped it from monitoring apps installed by ADB)

Regardless, my phone’s “about” screen now thinks it is:

Model GEM-703L

Build GEM-703LV100R001C233B111_KANGVIP

Android version 5.0

Kernel 3.10.61-g1663b97 (no idea what this even represents)

EMUI 3.0.5

I still can’t get the B112 UPDATE.app to work

The “how to” guide talks about…. reboot and select from “options” -> “update” and press menu icon for “manual firmware update”. I don’t see this exact thing on my phone – is someone able to explain the steps from booting the phone to get to this point ?

(I have tried going settings > update > menu > local update – this offers “full package: update.app” on sd card but when I choose install, it reboots to EMUI and almost immediately flashes up “version check fail” and then goes to the big red “!” fail message)

(It seems that somehow, the power and vol up+down method now doesn’t force updates – it used to but now it just repeats the first boot screen, then off, then vibrates – over and over)

I don’t really want to start wiping things and going back to other versions but I have no idea what to do now?

At one point the phone booted and EMUI offered to update via network but I was in the middle of following the instructions so ignored it – was that stupid ? I don’t see it now when booting.

Audioralf, thanks for all your advice up to here. I’ve tried to answer your questions/suggestions below (have missed out the ones about ADB etc as this is now OK):

This is because ajsmsg78 die not yet receive an untouched b006 cust to integrate it into the universal cyst b112.

What is “untouched” ? I guess I have a nandroid backup of my B006 but it’s from a phone that’s been in use for at least 6 months. Can I get at the cust file from that, and would it be any use to ajsmsg78 ?

- renaming of files was wrong

I haven’t renamed any files – have I missed something ?

- not done reset on emui

reset ?? DO you mean the “dload” update from ext SD ? I can’t get this to work (boots into emui but then flashes up “version check fail” very quickly and then goes to big red “!” and fail message.

- corrupt format of internal sd

No idea. Can I reformat that from where I am without undoing all my progress?

- too slow external sd card

Class 10, supposedly. One is a Lexar, one is a Transcend and one is a Samsung

- installed the wrong recovery

B015, from your thread (and also tried one from a downloaded ROM)

- had overwritten uni cust via flashing cust.img

Could this have hapened accidentally? I haven't deliberately done this except very early - long before I installed KANGVIP during this process

- not supported version in universal cust

As said at the top – can I help that by getting a file out from my nandroid backup file ?

---------- Post added at 09:07 PM ---------- Previous post was at 08:57 PM ----------

WHen I search for info on emui "version check fail" I often find advice (for different phones) to "sideload the OTA upgrade" using ADB - is this somethign I could do on this device ?