Thanks for all the hard work and all the information - a few questions, yet:
Q1: can I boot into the recovery without flashing it to the device?
As @mde has mentioned, I also get an error when trying to
fastboot boot into the recovery.img. This makes me a bit nervous and keeps me from flashing the image to the device, at the moment . Here’s what I get:
D:\...\>fastboot.exe boot twrp-recovery.img
OKAY [ 0.501s]
FAILED (remote: bootimage: incomplete or not signed)
finished. total time: 0.506s
Same question, different wording: does this error only occur when trying to “boot” into the
recovery.img and should flashing it work properly? Or will “flashing” it to the device produce the same problem (or real one then…)?
Q2: which one is the TWRP recovery.img that I should use for FP2 today?
I suppose the “newer” one from @OuinOuin’s post is the one to go for? (or are there any more up to date TWRP versions for the FP2 in the meantime?)
Q3: could a broken recovery image be restored again?
If I flash the TWRP
recovery.img and in case it didn’t work, is it possible to boot into fastboot mode and flash the original recovery again? I would I end up with an entirely messed up (bricked?) phone in case something went wrong here?
Thanks already for your efforts!