So you're in a pinch, and you need to swap out the SIM card or install a microSD in your Android device, but you can't find the nifty little ejector tool that came in the device's retail box. Fret not ...

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.

If you've ever upgraded to a new phone or switched carriers, chances are you're already familiar with the concept of a SIM (subscriber identity module) card. It's a tiny chip in your phone that ...