Downgrade to Android 6.0 doesn't work...

M4sterguru

I bougth my UMI PLUS 2 months ago, updated rigth away to Android 7.0, everything works, but the back camera, when you take a photo, it have a red layer. Well i was waiting for a update, but i don't see when it will come out, or if is gonna come out ever.

Since the camera worked very well with android 6.0, i download the rom PLUS V3.01_20161009 - SPFT release, the first ROM.

I use SPflashtool, used all the instructions, but after flash it, i turn on, the screen turns on but stay black, i hear it start and vibrate once, i all works but the screen doesn't, tried a few times with this rom, with other options like format+download, and same results.

i download the ROM V3.01_2016009 Rom - SPFT realese, and same results.

Download the last rom, android 7.0 and it acept the rom, and it works...

What i'm doing wrong? Or it isn't possible to downgrade to android 6.0?

Cheers

MarcinP

Please follow this instruction but please skip 6th step as you need overwrite all partitions.
http://community.umidigi.com/forum.php?mod=viewthread&tid=11
Also you can perform factory reset before doing anything.

M4sterguru

MarcinP replied at 2017-3-13 08:19
Please follow this instruction but please skip 6th step as you need overwrite all partitions.
http: ...

i tried everything, it only works with the last rom, the others, the screen gets the backligth on.
Now i lost my imei numbers, cause i tried the last resource, format+download. I read how to recover them, i have them on a photo, if they were wiped out of the NVRAM.
Maybe my phone came with a rom, that it isn't listed on the roms sections.
One thing i'm shure, the android 6.0 roms listed on the rom sections, aren't compatible with my UMI PLUS.

I will wait for an eventual update, of a more stable android 7.0 for UMI PLUS.

Meanwhile, i will try other forums, if i can get help.

MarcinP

M4sterguru replied at 2017-3-14 23:04
i tried everything, it only works with the last rom, the others, the screen gets the backligth on.
...

So maybe please use your own version of firmware and then flash system with SPFT but wit preloader unchecked. Also please use firmware upgrade.
This should fix screen issues (hopefully)
IMEI numbers should be on the box too.
This what I know there was no other version of Android 6.0 for plus only this which are on forum

MarcinP

M4sterguru replied at 2017-3-14 23:04
i tried everything, it only works with the last rom, the others, the screen gets the backligth on.
...

Android 6.0 needs to be compatible with umi plus as every umi plus is coming with Android 6.0 out the box and then is getting updated through to FOTA.

overrid3

You should try flashing the one that works (android 7) and then flash android 6 over it WITHOUT the preloader. That contains the drivers and stuff.

overrid3

I checked too and no way to put back stock 6.0. Phone boots but no image on screen.
Please help. Android N is really bad

fakherbadareen

I have the same problem and no solution yet