Changing carriers can be exciting. You might get to pick up a new phone, or maybe you want better coverage in your home area. Either way, you have to know how to get set up. Each carrier tackles SIM ...

Sareena was a senior editor for CNET covering the mobile beat, including device reviews. She is a seasoned multimedia journalist with more than a decade's worth of experience producing stories for ...

You can activate a new or used iPhone for use with a cellular service provider in a few steps. Here's how to activate any ...