Micro-SIM is well known as 3FF.The "Third Form Factor" SIM is a mini-version of the normal SIM Card and will be used in a number of mobile phones, includinge iPad and iPhonen. The actual size of the card is 12mm x 15mm, which is 52% smaller than the normal SIM.

Watchdata Micro-SIM card means "something special" for the operators. Firstly it is environment friendly, because it reduces plastic card waste. Secondly, it is cost effective because it reduces the freight cost besides savings in plastic cost. Thirdly, it has the novelty value.

The micro-SIM-adapter (3ff-adapter, mini-UICC-adapter) has a frame, which will carry the micro-SIM (3ff-SIM) and converts it into the size of the standard SIM. You can then use your micro-SIM for the iPad and iPhone.

Related case:

MicroSIM cards for India