If you use Samsung Cloud you could factory reset the phone , switch sims and then when re setting up the phone key in your own Samsung Account into the phone and set it up from the most recent back up @Killermouth72
Daily Driver > Samsung Galaxy s²² Ultra 256Gb.
Samsung Gear s³ Frontier Watch.
Samsung Galaxy Watch⁴ Classic.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.