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 ...

What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...

When Apple announced the iPhone XS, XS Max, and XR, the company announced that -- for the first time -- it would be possible to use two phone numbers on the same phone using eSIM technology. An eSIM ...