By default, the iphone is served from AT&T. Many people with iphone’s want to use a different service provider, which is why there are many people searching for the term "unlock iphone". The good news is that it is in fact possible to use a different service provider for your iphone. In fact, all it really takes is a simple download and a few simple clicks. Of course, you still need to do a little due dilligence before you get anything. Watch out for spyware and adware. If a program is paid for, at least you know you’ll probably get something for your money.