There are generally three types of SIM card still in use today. There’s a Standard Sim, Micro Sim and Nano Sim.

Standard Sim: The oldest of the three types of SIM is generally used in all handsets prior to 2010 and plenty issued thereafter. It is the largest of the three Sims types, measuring 25x15mm.

Micro Sim: The only real difference between the SIM standards is the size of the plastic around the microchip. The Micro Sim was developed as part of the perennial quest to make smartphones slimmer and lighter and measures 15x12mm.

Nano Sim: Many newer smartphones now use the Nano Sim standard introduced in 2012. The newest devices from Samsung and others all feature this slot which measures 12.3x8.8mm

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