I have just returned from Boston and because I hadn't had a chance to turn off my roaming I was charged £42.00 on LANDING because my phone automatically connected to a network. Apparently this took up 8MB of data!!!
I had a text that said "Welcome to the USA" etc, and within a minute one that said "you've reached your £42 data limit" . HOW???? Both texts are timed at 20.09 on 07 October whilst I was waiting to get off the plane!
Don't bother ringing the call centre, they are not interested and just say it's a valid charge, and make it sound like it's your fault for not turning off roaming!!!! They don't even try to explain how you can use 8MB of data in under a minute whilst the phone is in your pocket and you're in a queue to disembark. I feel ripped off.