As I never had to do this before … How exactly do I do it?
I had a look at Signing Builds | LineageOS Wiki, but everything there seems to base on building LineageOS myself?
Can’t I just take the migration ZIP from here and reverse the key changes it is doing in the update-binary script to get from official to unofficial keys?
Or are the key values different now?
For the record … didn’t help.
Encrypted the phone with 14.1 … wiped 14.1 and installed 15.1, which started up fine with encryption intact … flashed a “reversed” migration ZIP just to try something quickly … installed 16.0 without wiping 15.1 … didn’t help, decryption still unsuccessful.
Could there be some log somewhere which could help?