Quick question here. My wife and I have both of our lines on one account. My line is up for a subsidized upgrade and my wife really wants an iphone 4s (I know it's terrible.) We both have unlimited, her phone is 3g only, and mine is 4g (Thunderbolt) with the $30.00 unlimited tethering plan. My question is if I allow her to use my upgrade for an iphone will it affect my unlimited data or hotspot plan? My concern is that temporarily they will have to place the new iphone on my account and that brief change will void my 4g only hotspot plan. I appreciate the help if anyone has answers. I am going to try and call a CSR as well, but I just don't trust what they say.