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 iPad's Subscriber Identity Module connects the tablet to cellular data when Wi-Fi is unavailable. Unlike the iPad Mini, which uses a nano SIM card, the standard iPad uses a slightly larger micro ...

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.

Are you thinking of making the switch from a physical SIM to an eSIM? The good news is that you may be able to simply convert your SIM card to an eSIM from your device. We’ll walk you through the ...

Subscriber identity module cards, more commonly known as SIM cards, store phone account information that networks use to connect calls and messages, among other types of communication. As a business ...

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 ...

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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) ...