Mini-SIM, Micro-SIM and Nano-SIM: what are the differences?

Currently, mobile operators offer three types of SIM cards: Mini, Micro and Nano. In fact, the user can select any of the SIM cards, for the telecom operator it does not matter.

The question arises – how do these three SIM cards differ? In fact, nothing, except perhaps for its overall dimensions. Although there is another important nuance: the Mini and Micro contact plate and exchange interface are identical, but the Nano contact plate is slightly different, since the thickness of the SIM card is 0.67 mm versus 0.76 mm for Mini and Micro.

Now it’s clear how the SIM cards look and their sizes in millimeters.

Mini sim

Length: 25mm

Width: 15 mm

Thickness: 0.76 mm

Micro SIM

Length: 15mm

Width: 12 mm

Thickness: 0.76 mm


Length: 12.3 mm

Width: 8.8 mm

Thickness: 0.67 mm

Than bad a large number of formats of SIM cards?

But the bad thing is that different smartphones support different SIM cards. True, most modern smartphones are designed for two SIM cards and support both Micro-SIM and Nano-SIM, however, if the device has support, say, only Mini-SIM, the card will have to be cut or exchanged from a mobile operator.

Another problem. Let’s say you have a SIM card in Nano format. The smartphone is out of order. You want to transfer the SIM card to another phone, and it only supports Micro-SIM. What to do? In this case, only an adapter can help, but do you have one? Well, if there is, and if not?

However, it is likely that in the future telecom operators will switch to virtual SIM cards, that is, the use of physical SIM cards is not required. But when this happens and whether it will happen at all, no one knows.