[ehasbrouck]

I'm a citizen and resident of the USA. But I have travelled often in Germany, roaming on Deutshce Telekom cell towers using a cellphone with a T-Mobile USA SIM and a US phone number. DT has collected data about my roaming in Germany, and has transferred that data to T-Mobile USA for billing and other purposes. So some of the data about me held by T-Mobile USA, which T-Mobile USA has refused to allow me to see, was collected in Germany by Deutsche Telekom.

[cj]

(I could be wrong but) GDPR does not grant rights to American tourists visiting Europe unless they are residing there (e.g. established residency, not just traveling through)

[joecool1029]

Probably also a distinction to make but T-Mobile USA's international roaming isn't meant for long-term usage and they'll terminate the account if more than half a year or so is outside the US.

I always thought of the cost implication for T-Mobile before this thread, not that they are probably more concerned with legal exposure of people changing residency and trying to remain as customers.