Take advantage of the free wifi and speak to your network before you go and find out fully about their charges, I was already at the airport when I thought it would be a good idea to ring and tell them I would be abroad so not to block my phone, the guy started on about international phone calls which I heard as blah blah blah, I had no intention of using my phone to ring or text anyone, big mistake we used Garden Grocer to have shopping delivered to our hotel even though you do the order online you they still ring you to confirm the delivery and if you have ordered beers to confirm you are over 21, I listened to 2 voicemails (from GG) and rang them twice to confirm delivery (5 min tops) and my charge for this when I got my bill was just over £30 on top of my normal contract, I had no idea it would be that much.