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.

SIM cards have become a universal aspect of modern smartphone usage, but the technology and meaning behind the name dates more than three decades.

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, ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.

For the past three generations of the iPhone, Apple has stood alone in a particular area: eSIMs. Apple made a shift that many had anticipated since the first eSIM was launched in 2016, dropping the ...

A dual-SIM setup lets you use one phone to make and receive calls and texts from two numbers. It's also super convenient and can save you serious cash when traveling. We show you how to use two SIMs ...

Quite a few phones worldwide support the simultaneous use of two physical SIM cards, but not many US models do. In fact, most otherwise dual-SIM-capable phones see the feature disabled in the US ...

Apple has proposed a standard for new, smaller SIM (Subscriber Identity Module) cards, in an effort to free up more space on future smartphones. The Apple proposal was filed last week, when ETSI’s ...