When I was looking at a new contract earlier in the year I was keen to find out what the roaming was like in the context of charges. EE said that they didn't charge if I went with the Max Plan can't remember the cost but it was at a premium to other plans. It came with a ridiculous amount of data and I also needed to buy a new phone with them which I didn't need (and doubtless contributed to the cost). Didn't fancy that.