Changing physical SIM cards on your phone is always a fiddly business. First, you have to root for the little SIM tray tool ...

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 ...

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 ...

All iPhones and iPads with cellular have a slot on their sides that houses the Subscriber Identity Module (SIM) card provided by your mobile carrier. The SIM card enables your device to access the ...

To unlock your iPhone from its carrier, you'll likely need to contact your carrier directly to cancel your contract.

The iPhone Air will only have an eSim - will other phone makers also shift away from the familiar - but fiddly - plastic ...

I have an iPhone 4S and I'm about to pull the trigger on a Nexus 4... I don't want to commit to the new platform yet, and if possible I'd like to switch between the two phones from time to time. I ...

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) ...