but you can only do so with a UK-based credit card or by visiting a Three store or calling them, which you can't do outside the UK.I feel like the description of the SIM doesn't adequately highlight that while minutes are included, those minutes are ONLY good in the UK despite arriving in each new country and getting a rate update message from Three saying how much per minute calling is

Once activated, the account shows zero data and zero minutes available, with the only option being to purchase data and minutes with a credit card