iPhone7 Plus cannot use Micro SIM card and needs to use NanoSIM card.
Like previous generations of iPhones, the iPhone 7 Plus uses a NanoSIM card solution, commonly known as a mini card, which is the smallest SIM card. It is currently widely used in Apple, Samsung and mainstream domestic mobile phones.
Micro-SIM card, with the successive launch and exposure of Apple’s two new products, iPad and iPhone four generations, Apple continues to challenge the current industry standards. One of them is the small Micro-SIM card. -SIM card (SIM small card), replaces the standard size SIM card we usually use. In December 2012, Apple officially obtained a patent related to the Micro SIM card connector. The patent obtained by Apple is related to the Micro SIM card connector, which can help users remove and insert SIM cards more conveniently. It also ensures that the equipment will not be damaged while providing reliable mechanical performance.
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 cards 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. The nano-SIM card is a micro-SIM card for mobile phones, which is smaller than the Micro-SIM card. It has only 60% of the area of ??the first-generation SIM card. Its specific size is 12mm x 9mm, and its thickness is also reduced by 15%. The nano-SIM card aims to replace the micro-SIM card installed on the iPhone. Its smaller size will free up space for increased memory, larger batteries and denser motherboard arrangements, which will help mobile phone manufacturers produce Thinner and lighter products.