He writes: "My iPhone came complete with SIM installed, and once I had downloaded and installed the latest version of iTunes, it took less than 20 minutes to activate the phone and it worked ...

If you're a new T-Mobile customer or you recently purchased a new phone, you may have a new SIM card you'll need to activate. Here's how to set it up.

A new iPhone bought through AT&T should arrive with the SIM card installed and activated. However, if it didn't, you should be able to activate it right on the phone itself.

This week, Apple said its new iPhone 14 devices will no longer use physical SIM cards to activate cellular voice and data service. Instead, users will turn to eSIM.