So you’ve chosen Ultra Mobile as your carrier. Great choice! But before you start enjoying those international calling features or high-speed data, you need to install your SIM card. Don’t worry; ...

While most people manage quite well with a single SIM card, if you want better demarcation between your work and home life, or you want to make roaming with multiple SIM cards easier, then having the ...

BlackBerry did a good job of keeping things neat and tidy under the battery door of the BlackBerry Z10. The Micro SD card is easy to insert and remove from its slot, as is the battery. When it comes ...

Your device will automatically register the SIM if it has been activated through your carrier. TIP: On the BlackBerry KEY2 there is a small hole at the top of the device, note that this is not the ...

Most people manage perfectly well with a single SIM card, but some people like to have separation between their work and home life (or maybe they run several different businesses), or they travel a ...

All modern iPhones and iPads now use nano-SIM cards. Unfortunately, this can be a bit of a problem for anyone switching from an older device, because the nano-SIM is much smaller than the micro-SIMs ...

Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...