what on earth are you doing with your phones to think you will ever get near a 10gb limit??
are you that guy from the movie 'the terminal' and you actually live in the airport? i know planes are delayed now and again but i just cant see you being there long enough.
i just got back from the US (Dallas and Phoenix, road trip) and almost every night, i was in a different hotel/motel, and every time they had wi-fi freely available (i wont stay at a hotel that charges extra for data). almost every bar/restaurant had free wi-fi as well.
if my phone data plan was my only access to the internet then i would go above 10gb a month.
i do obtain large files from the web (my net usage was about 80GB when i last checked in the summer), but why would anyone choose to spend 6 hours downloading something via their phone, when it would take less than 1 at home, at work, in a hotel or in a bar?
now i will get back to watching the 3 NFL games i am currently streaming