After you purchase and use your cellphone for an extended period of time, you can change networks. However, the phone that you're currently using may not be offered on that network. If you wish to ...

One of the promoted specifications on the new Apple iPhone 4S is the "world phone" capability, but it isn't quite the world phone that many international travelers who use GSM phones are used too.

If you’ve bought a cellular iPad from someone other than Apple, you may later find that the iPad is locked to a particular network. If you insert a SIM from a ...

To unlock your iPhone from its carrier, you'll likely need to contact your carrier directly to cancel your contract.

Click to viewWe finally got our gear and tried the forged SIM card method to completely unlock the iPhone. It works, but beware, because it depends on what kind of ...