We're a UK mobile network, so our SIMs are meant for people living in the UK. But with our awesome free EU roaming you can use your UK plan in the EU for up to 60 consecutive days. This means that you can send unlimited texts and make unlimited calls to UK numbers. You can also use your data plan when abroad in the EU, up to 20GB per month on our unlimited plan.
Please note that calls to EU numbers are not included in this and if you spend over 60 consecutive days in the EU, Three reserves the right to ask you to transfer out or pay extra to continue to use your SIM. Well always give you notice if Three request this though.