If you are travelling to Europe ( EU and UK ) then there is no better product than the O2 Travel eSIM. This product is a full-service product – supporting Data, Voice and incoming SMS. It lasts for 30 days and comes with a whopping 20GB of data which is more than ample for most trips. The plan includes 500 minutes of EU to EU calls so that you can call the restaurant or book a taxi during your travels.