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

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.

A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.

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