Talk:Spain/@comment-23.241.221.239-20180402214129/@comment-24682153-20180406000443

Q1: Europe is a bit different to the US. The SIM will surely not expire during your trip. They are valid for 6 to 12 months without any activity on this side of the Atlantic. However, if you activate the starter on a payable plan like a data package or an all-in pack this will surely trigger this plan.

Q2: You might check out our chapter about the European Union. Theoretically, you can buy a SIM card in every country to roam anywhere else within the EU without extra cost. In practice, in some countries you have to do this on location for registration, in others "Roam like at home" is still severely restricted. You have mentioned the UK. There, it's no problem, but be aware that Three UK and O2 UK only offer 3G roaming.