Thinking of moving to the shared plan. I have 2 friends who are paying as single on a carrier but want iphone and better service. I think I can add the two friends and my 3 family phones over to a shared 10GB plan and end up saving me a little money. It would cost me $30 to add each, but I can charge them $60. Too much hassle? I hate my high phone bill. Anyone thought of this/tried this?