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SIM card sizes
Three different SIM card sizes
There are three different SIM card sizes, so-called normal-sized mini-sim, smaller micro-SIM and smallest nano-sim.
Mini-SIM (“normal size SIM card”)
Mini-SIM card is usually used in older phones and tablet computers. Also some of the newer smartphones are still used in mini-sim card, but the use of this size sim card is decreasing all the time.
Micro-SIM
Micro-sim is the most commonly used sim card size in smart phones these days. Also most currently released new tablets use micro-sim.
Nano-SIM
Nano-sim is the smallest sim-card size, which is still relatively rare. However, use of nano-sim is increasing all the time and many manufacturer’s new top models, such as Samsung’s Galaxy S7 and Apple iPhone 5-6 is using nano-sim card.
SIM card cutting
You can change Micro-or nano-SIM card to the “normal size” mini-sim card with successful adapter.
If you need smaller SIM card than your current SIM card, you can order a card from your operator or alternatively, cut the card yourself.
Below is a great video that help you to cut the card either to the micro or nano-SIM card.