I updated to the last versione of the OS but can’t switch on anymore. I managed to enter del fastboot mode but my pc doesn’t see the phone so I can’t try to manually upload the OS.
I have windows 10 and all drivers are updated.
I can only enter the recovery mode and not to lose my data I chose to try to use ADB for solving the problem. It seems I can see the device from platform tools, but I don’t know what is the exact command to sideload fp2-gms-19.11.2-manual-v2.zip
I tried with: .\adb sideload fp2-gms-19.11.2-manual-v2.zip but the result on the phone is:
Finding update package…
Opening update package…
Verifying update package…
E:footer is wrong
Update package verification took 0.1 s (result 1).
E:Signature verification failed
How can I solve this problem?