These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another. I started my career with CNET all the way back in ...

Every smartphone needs a SIM card that assigns you a phone number and lets you call, text, and use the best data plans. But, there's more than one type of SIM card, and the user experience varies ...

The sim card that exists inside your phone is what connects your phone to your specific cellular network. For most of us we might not even realize it’s there. When we get a new phone from our carrier, ...

A SIM card is a unique identifier in every cell phone that enables the device to connect to wireless networks in order to text and make calls. An eSIM refers to an “embedded” SIM, or a card that is ...