I’m visiting for two weeks and roaming prices are insane, I’m considering getting a prepaid SIM-card. Can I easily grab one in any shop, e.g. at the airport/Walmart? What are the prices? Unlimited data would be nice, but I can survive with a few GBs too, I’d probably need it mainly for navigation.
Check if your phone accepts e-SIM. you can buy them before even arriving. IPhone accepts e-SIM since model XR I think. They call it “add a cell plan” or something like that in the Settings/cellular page.
The advantage of e-SIM is that your original SIM card stays inside the phone and it can still be used.
Just be very careful if you do this. If you leave your local SIM card active and someone calls your local number your phone will ring and if you answer it you can pay huge roaming charges.