Our problem is that we have Vodafone broadband at home so hardly use any data on our phone as it always uses the home router to connect via WiFi as the actual phone signal is pretty crap, so my data usage is never going to be less abroad than at home? Don’t quite know how that’s going to work?You will have to have a look at the exact wording but ID mobile part of car phone warehouse using the 3 network as is Smarty, claim that their roaming is unlimited providing you do not use more data abroad than you do when at home over a four month period.
Both Smarty and ID mobile have good deals.