What is 4FF and 3FF in SIM? 0

3FF is also called Microsim. It is most commonly used in mobile devices. The microsim was introduced in 2003. This form is called Third Form factor or 3FF.

-family: inherit; text-align: justify;">Various SIM cards are,

First Form – Credit Card Sized cards

Second Form – Stamp Sized SIM cards

Third Form – microSIM

Now ETSI accepted new standard named nano sim which is also called 4FF or forth Form Factor. 3FF has a dimension of 12mm x 15mm.

Various Sim sizes and dimensions are showed in the image shown above.

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