A dual-SIM setup lets you use one phone to make and receive calls and texts from two numbers. It's also super convenient and can save you serious cash when traveling. We show you how to use two SIMs ...

Phone suddenly showing "No SIM" or "Invalid SIM"? Don't panic, there are a few quick checks that can get you reconnected fast.

The newer eSIM technology, which is quickly becoming the standard on high-end phones, is safer and more convenient.

For the smartphone that does everything, you need a case that does even more. Such as turn your one iPhone into two. Meet the Krimston Two, described as “a 1 phone solution to a 2 SIM card problem.” ...

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) ...