Hacking Modems
Tutorials:
Great tutorial by Guillaume Delugr´
Android gdb
Probably (best) tutorial from Alisae sage
https://media.ccc.de/v/osmodevcall-20230719-laforge-wired-rf#t=1789
CCC events
I will elaborate on the above as time permits, but these are really amazing resources for where I learnt a ton of things.