I think I may need to call a corporate office or something since I am getting conflicting information from TMo stores in the USA. Wife and I have iPhone 5 (not s/c) on Simple Plan. We are planning a trip to the UK in the 4th Quarter of the year and being over there for three weeks. Not looking for calling back to USA or use much data beyond GPS and simple browsing, and maybe a little email. Trying to figure out the best option for wife and me to communicate together while over there. Supposedly there is a Simple Plan International for $15 which has unlimited data and text, but a bit unclear about the voice. It says $0.20/min but I think that is if we call landlines or mobiles not on our account. Not sure if it is also between our mobile to mobile calling. Also, not sure how well out TMo USA iPhone 5 will work in the UK (3G, 4G/LTE). Mostly around London and Southern England. Anyone got any ideas? Also thought about just landing over there, acquiring one of their free SIM's (for each phone) and implement a Pay As You Go service.