This is Google’s real plan for battling Android fragmentation: Update as much of the operating system and its apps as possible without going through device manufacturers or carriers.
Older devices aren’t as outdated as they used to be. For example, when Android 4.0 Ice Cream Sandwich came out, it brought an entirely redesigned interface, performance improvements, and even APIs limited to Android 4.0.
Many Android users feel depressed when all of their phone contacts have been erased after you factory reset phone, format SIM card or delete data accidentally.
Android's user interface is mainly based on direct manipulation, using touch gestures that loosely correspond to real-world actions, such as swiping, tapping and pinching, to manipulate on-screen objects, along with a virtual keyboard for text input.In addition to touchscreen devices, Google has further developed Android TV for televisions, Android Auto for cars, and Android Wear for wrist watches, each with a specialized user interface.Variants of Android are also used on notebooks, game consoles, digital cameras, PC and other electronics.Android applications ("apps") can be downloaded from the Google Play store, which features over 2.7 million apps as of February 2017.Android has been the best-selling OS on tablets since 2013, and runs on the vast majority, Android has two billion monthly active users, and it has the largest installed base of any operating system.