I plan to buy Apple Watch 4 with mobile because I sometimes have seizures when I'm out and running, and having certain features like fall detection and SOS in emergencies would give me some independence. I'm moving from the US to the UK soon to get a master's degree. A Verizon employee (my operator) tells me that if I have an "internationally unlocked" version of the watch and it pays off when I go, then I can somehow set up mobile services while I'm at school. Does he mean the A2007 model of Apple Watch 4 (GPS + Cellular), unlike the American model A1975? If I buy the A2007, can I use it in the US with my regular phone plan, and can I potentially use the SOS feature in the UK next year? I would be willing to switch to a UK phone plan if necessary. Apologies if this is not the right sub to post in!