Hi @Mario.CH,
Thank you for your reply.
I'm not sure if that's the right solution. I also have a Volla Phone X23 (vidofnir), and I think it's kind of soft-bricked.
Using the UBports Installer, I can successfully install Ubuntu Touch and SailfishOS. However, when I try to install VollaOS again, it fails with an error stating that it can't find the dpm partition. Afterwards, the device gets stuck in an endless reboot loop.
The files for "vidofnir" at https://ota.volla.tech/ don't seem to be the full firmware. I don't think sideloading those would help, since VollaOS isn't currently working.
I can still get into recovery and fastboot mode.
While SailfishOS was installed, I looked at the partitions, and all the necessary ones seemed to be there, including the _a / _b slots. Manually flashing all the VollaOS .img files to slot A seemed to work, but the OS won't boot even after hours of waiting.
I'm not sure if it's completely soft-bricked, since SailfishOS and Ubuntu Touch seem to work fine. I can't find an official scatter file for VollaOS in the firmware downloaded by the UBports Installer; otherwise, I would have just used the SP Flash Tool.
Do you have any ideas or tips on how to get VollaOS working again or to get the offical scatter file?
I also thought about writing the scatter file myself, but I am scared to completly destroy the phone this way.
Greetings, Skrap3r