The SIM cards that fit into those tiny slots in your cell phone and tell your cellular network to whom your calls are to be charged come in four different sizes. With the only real difference between ...

If you're in the market for an unlocked iPhone 5 and need to fit your existing SIM card in it, you can actually cut your current SIM card down to nano size at home. Most people won't need to do this, ...

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So you are looking for the best smartphones with Nano SIM card slots? Well, let’s get into it then. Those of you who are not familiar with SIM cards, I bet you use CDMA phones. SIM (subscriber ...

Let’s say you spent your vacation abroad a couple of years ago. Being thrifty, you removed your U.S. SIM card from your unlocked iPhone 4 and inserted a SIM card from a carrier in the country you were ...

While most people seem to manage just fine with a single SIM card in their smartphone, some -- especially travelers, who can save money by fitting a local SIM card into their handset -- love the ...

As the new iPhone 5 will be moving from the micro SIM cards employed on the iPhone 4 and iPhone 4S to a new, smaller nano SIM card to conserve space, wireless carrier AT&T is beginning to stock up on ...