The hottest part of the mobile market is the cheap, sub-$100 device. Need proof? At its annual I/O developer’s conference in San Francisco Wednesday, Google announced AndroidOne, a program to seed reference designs to hardware makers in order to speed up the process of bringing the latest hardware to price-sensitive consumers. AndroidOne phones will have stock Android, Google Play auto-installs, and automatic updates. Hardware manufacturer Micromax already has a device ready that will retail for under $100. In addition to a 4.5-inch screen, it’ll pack developing-world friendly features such as dual-SIM support and an FM radio. This device — and future AndroidOne devices — will compete directly with Motorola’s inexpensive Moto G and Moto E, as well as Microsoft’s inexpensive Windows Phones.