I've heard of this happening at T-Mobile recently, how common are these attacks becoming? Has anyone else seen or suffered one?
Do you know if they managed somehow to get an e-sim? Otherwise the "overseas" is a tad difficult as it would require physical presence to collect the SIM card from a brick and mortar store.
Are there controls/options that you can arrange with your provider to ONLY hand a SIM card only with physical presence and ID check?
Over in EU you need to show up with a valid ID to get a SIM. Unless the employee of the store is 'in on it' and will hand your SIM to an accomplice.
SIM swap attacks are usually targeted (high value targets, e.g. crypto people)