Issues with custom ROM and rollback to FPos with the manual install software

[r4Zi]

Tomorow i will read this topic, it might help alot

Guide to bootloader and bricking [2025] -- Discussion

Thanks for the paper, you’re the best! What I learned from it : normally the rollback index is flushed after unlocking so you could theoretically downgrade and then lock, no problem there are 4 (four) rollback indices in storage at any time. 2 (current and last one) for each slot (a/b). And the locked bootloader verifies that the OS you’re trying to boot has a rollback index equal or greater than any of the 4. There is some discussion about what a successful slot it, it may be less than that,…