I tried it multiple times, but the full B609 doesn't want to be installed: it arrives at 100% and then says error.
I tried also, from My-Rom with CWM, to restore my backup (via CWM), but ended in a bootloop. I tried to put into dload the B603, but gives also error (because I want to fully de-brand my phone now, so I want to arrive to have a clean B133).
Any ideas? Because now I'm stuck on My-Rom.
Should I flash anything from ADB? If that's the case, please give me hints.
Thanks!
So, at the end I managed to go to full b609 by flashing the original video e intro logo from My-Rom. Then I went to b133, change CUST (I have already de-branded the phone, but anyway), then it proposed me update to b615, then nothing. So I manually upgraded to 621-623-830, with a full wipe after every installation.
At the first boot, all the video were working fine: but after a reboot, no one was working. So I installed the fix (com.google.android.webview.apk) which fixed all the videos reproduction, but was keeping mediaserver always running. So I uninstalled the webview package, reboot, and then all the video were working fine, apart from Facebook, and mediaserver was always quiet. Super strange! Anyway, for now I'm sticking to this configuration.
By the way, I easily rooted the phone flashing CWM, then SuperSU, then installing BusyBox and playing with Terminal Emulator. The only thing, going from b133 to b830 my bootloader locked again, so I had to unlock it with the code.