I'm switching over to AT&T next week to get an iPhone. Usually if you sign up for a contract you can get a cheap/free phone. Would doing this allow me to use this phone along with an iPhone, or do iPhone contracts work differently so that you are only allowed to use your iPhone? Some places I go I don't think I would want to take an iPhone so that there is no possibility of it getting broken/stolen. With an iPhone and another cheap AT&T phone would it be possible to switch out SIM cards and use the other phone during this time? I don't really want to pay any extra money in my contract if thats what I would have to do, but it would be nice to have an extra phone if needed since I can basically get it for free if I just sign up for a regular contract at AT&T.