Cell phone SIM card


What exactly is a cell phone SIM card and what is it required for? It’s a small piece of plastic with a chip on it which you have to insert into your mobile device.

SIM stands for Subscriber Identity Module and stores vital information which grant you access to a cellular network. The cell phone SIM card is your access key to the cellular world. Based on this “key”, carriers will grant you access to their cellular network and let you use services to a particular price based on your chosen price plan from your operator.

A SIM card is identified by its Integrated circuit card identifier (ICC-ID), which is printed on the body of the card. The chip on the cell phone SIM card holds the IMSI (International mobile subscriber identity) and a few other information. Essentially, these two numbers serve as “key” to let your device connect to the cellular world as mentioned above.

The cellular SIM card can be moved from one device to the other, allowing you to use the same services to the same conditions in a different device.

SIM form factor

Unfortunately, not all devices demand the same form factor. That’s why cell phone SIM cards come in 3 form factors:

  • 1FF 85.6mm × 53.98mm × 0.76 mm – no longer used in modern day devices
  • 2FF 25mm x 15mm x 0.76mm – called Mini SIM
  • 3FF 15mm x 12mm x 0.76mm – called Micro SIM
  • 4FF 12.3mm × 8.8mm × 0.67mm – called Nano SIM

SIM QYNAMIC, Cell phone SIM card

Many cell phone SIM cards these days support all form factors. The Q-SIM from Qynamic for example supports the 3 major form factors 2FF, 3FF and 4FF. As it serves as a data only SIM card with worldwide cellular access, it is an ideal solution for people on the move. They can stay connected to their beloved ones to an affordable price whenever and wherever they want. Check out the Q-Travel offer from Qynamic on www.qynamic.com.