There is no difference, the micro card is the nano card.
Card types:
Ordinary cards are ordinary SIM cards, used in old mobile phones, commonly known as big cards.
The micro sim card is a micro sim card. It was used in iPhone 4 mobile phones in the past and is smaller than ordinary sim cards.
The micro card is the Nano sim card. Now iPhone 6/7 uses this kind of card. This card is the smallest.
Nano card:
1. Nano-SIM card, also known as the fourth mode element integrated circuit board, is a new generation of mobile phone SIM card. It is smaller and thinner than the micro-SIM in use. Apple and Nokia competed for design standards for the nano-SIM card and submitted designs in March 2012, awaiting a vote by the European Telecommunications Standards Institute. It was reported on September 13, 2012 that domestic operators purchased Nano-SIM cards, and the first batch was launched on September 21, 2012.
2. The nano-SIM card is a micro-SIM card for mobile phones, which is smaller than the Micro-SIM card. It only has an area of ??60% of the first-generation SIM card. Its specific size is 12mm x 9mm, and its thickness is also reduced. 15. The goal of nano-SIM is to replace the micro-SIM installed on iPhones. Its smaller size will free up space for increased memory, larger batteries and denser motherboard arrangements, helping mobile phone manufacturers to produce thinner and lighter products. products.