>just moving sim card to another phone will completely block you any access until you "reactivate" in the majority of telcos around the world.
Mind listing those countries? One source[1] for the US says that statement is only true for 1 of the 3 major telecoms. One of the other two requires an approved device to activate the sim, but otherwise doesn't care, and the other doesn't care as long as the device supports VoLTE.
just moving sim card to another phone will completely block you any access until you "reactivate" in the majority of telcos around the world.