Napalm Riot

Some new cell service providers have begun a service to accept customer's cell phones from other providers and unlock them so that the customer does not need to buy a new phone every time they switch providers. MetroPCS is the first company to do this, but it would appear that many more may follow suit. Also, apparently if you are with Verizon or Sprint, when you leave their service they are required by law to unlock your phone for you so you can use it with your next service.

If you want to read more, you can check it out here.