What is a1688 iphone?

The A1688 is the model number for the iPhone 6s. It was released in September 2015 and features a 4.7-inch retina display, 12-megapixel rear camera, and a front-facing 5-megapixel camera. The phone is powered by an A9 chip with 64-bit architecture and runs on iOS 9 operating system. It is available in 16GB, 64GB, and 128GB storage options with 2GB of RAM. The A1688 iPhone also has features such as Touch ID fingerprint scanner, Siri voice assistant, and Apple Pay. It can be upgraded to the latest iOS 14 operating system.