You're probably already familiar with the SIM card, a tiny chip in your phone that connects it to your cell phone carrier of choice. For years, this chip was on a physical card that you could swap in ...

The physical SIM cards we've used for decades are slowly being phased out. With the Pixel 10 series, Google's phones have gone eSIM-only for the first time—at least if you buy them in the US. Apple ...

What's the SIM unlock policy for Verizon, T-Mobile or AT&T? These are each carrier's current device unlock policy as of 2026.

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 ...

After three years, telecommunications company T-Mobile is bringing a handy feature back to the T-Life app: self-service SIM swapping. SIM swapping lets users switch which SIM card is associated with a ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead. I started my career with CNET all the way back in 2005, when the (original) ...