Google had been clear from the inception of the Android OS: Its intended goal was to have multiple versions of the OS. The Nexus One is still the (officially) the only Android handset to support the 2.2 (“Froyo”) version of the operating system. Android OS versions 1.5 and 1.6 make up slightly less than 50% on Android devices, according to a GigaOm report. Will we see Android “dumbphones”? It’s probably unlikely, but a creative solution will be needed.”]
Source: https://www.csoonline.com/article/2125507/the-state-of-the-android-ecosystem.html