Fastboot does not work

[pvdv]

@AnotherElk

Can’t say I’ve seen this, but then I always used TWRP to install such ZIPs back in the day (and TWRP had a setting for signature verification which had to be kept turned off).
If you want to try and TWRP is not installed, you can just boot TWRP without installing it, see twrpwoflashing .

Thanks for your help. I could flash the modem using this page:

FP2 How to use TWRP without flashing it (e.g. for Backup)

I already posted it here, but I’m pretty sure many people aren’t aware of this I found a way to boot TWRP without flashing it, so you only boot it from your computer, do what you want and as soon as you shutdown your phone, it’s just as it was before. TWRP is a great tool for many things (install updates, perform a factory reset, create or restore a (full) backup, copy files between PC and FP2, …) It’s pretty simple to do this, the hardest thing may be getting fastboot …

So I did boot the signed version of TWRP using fastboot.

I have to test the result better, but I guess it’s OK now. There is a blue LED blinking in fastboot modus

With regards,
Paul