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.

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 ...

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.” ...