What and how to backup before Sailfish X install?

asked 2019-03-15 15:32:36 +0200

madbilly
1 ●1 ●1 ●2

Hi everyone,

I'm a noob to Xperias and also a bit of a noob to backing up and restoring individual partitions, although I have some experience with flashing the Nexus 5 and Z3C with B2GOS and /e/.

I'd like to put Sailfish X on my Xperia X. I'd like to make sure I can return the phone to stock afterwards, if needed. I have read about backing up the TA partition so I will do that. However, before I even downgrade to Marshmallow to do that what do I need to do first to ensure I can return to stock?

Maybe I need to do nothing! Will it be sufficient just to reflash stock firmware (which matches my CDA) using Emma or Flashtool when I want to return to stock? Or should I backup some partitions using TWRP before I downgrade to Marshmallow and reflash them later too? Instead of using Emma/Flashtool or before or after?

I think what I want to make sure is that I can get back all the same version numbers in the Software Info of the service menu. Does that really matter? E.g. S1 boot, ETS, etc.

Thanks for your help in advance.

Cheers :)

PS - this was kind of asked here: https://together.jolla.com/question/186688/any-way-to-get-full-image-backup-of-android-xperiax-before-i-go-to-sailfishx/?comment=201164#comment-201164 but not really answered, even when I bumped the thread. I hope that one of you can help me out.

Thanks :)