Downgrade beta N to Marshmallow

acalegione

HiI installed the beta N in my Plus.I tried to get back to Marshmallow using the flashtools, but it does not leave the UMi logo screen.What procedure to go back to the version?Thank you.

alex2k6

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Format All+Download. Remove the check button preloader.

acalegione

alex2k6 replied at 2016-11-29 15:17
Edited by alex2k6 at 2016-11-29 15:21 \n\n
Format All+Download. Remove the check button preloader. ...

thank you. I'll try the next update.

acalegione

alex2k6 replied at 2016-11-29 15:17
Edited by alex2k6 at 2016-11-29 15:21 \n\n
Format All+Download. Remove the check button preloader. ...

It worked! Thank you.

ozaziz

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alex2k6 replied at 2016-11-29 15:17
Edited by alex2k6 at 2016-11-29 15:21 \n\n
Format All+Download. Remove the check button preloader. ...

Here is the deal. Brand new Umi Plus, successfully updated to Nougat 20161228 via SP Flash. When i try to downgrade to Marshmallow 20161019, operation successfully finishes and boots up with black screen. Phone boots up well but i can see nothing. Tried flashing it again with - preloader, again comes black screen. Only way to get rid of the black screen is to flash back to Nougat 20161228. Any ideas please ???

daichan7

ozaziz replied at 2017-1-2 22:54
Edited by ozaziz at 2017-1-2 22:56 \n\n
Here is the deal. Brand new Umi Plus, successfully updated  ...

I had the same issue as well (Gave the device away) No matter how I tried to flash back to V3.01_20161009 or V3.01_20161019, everything was working except the screen was black with backlight on. My best guess is, they used new hardware components and the two old firmwares to not have the correct/needed drivers included. Do you remember with what firmware you got your device? Got mine with V3.01_20161117 but this firmware will not be published in SPFT format according to the dedicated ROM thread.

I posted about the same issue in a other thread (tried to flash TWRP but was not working) but no one did replay. Did you try to flash TWRP?

Anyway good luck finding a solution! If you find something would be nice to post

ozaziz

daichan7 replied at 2017-1-3 04:18
I had the same issue as well (Gave the device away) No matter how I tried to flash back to V3.01_2 ...

I dont agree with the idea of new hardware/old firmware because my Plus already came with a firmware 20161010, which looks like a unique one, and atleast 20161019 should be compatible with my phone. I see some other phones have the same problem and have their solutions already. The thing is, their solutions dont seem to fit Umi. I am still searching and trying to find the right steps to safely downgrade to M.

Persizi

ozaziz replied at 2017-1-2 22:54
Here is the deal. Brand new Umi Plus, successfully updated to Nougat 20161228 via SP Flash. When i try to downgrade to Marshmallow 20161019, operation successfully finishes and boots up with black screen. Phone boots up well but i can see nothing. Tried flashing it again with - preloader, again comes black screen. Only way to get rid of the black screen is to flash back to Nougat 20161228. Any ideas please ???

I have exactly the same issue.

mmiz

Persizi replied at 2017-1-23 20:14
I have exactly the same issue.

Check this thread, worked for me ;-)
http://community.umidigi.com/thread-6027-1-1.html

Persizi

I've already answered in that thread, that I've tried and doesn't work for me.