Android M Nexus devices to get a two-year update guarantee?

When you buy a new phone, how long is it going to be able to run the latest software for? It's that kind of buyer anxiety that Google is hoping to do away with, according to the latest rumour reported by Android Police.Sources speaking to the site say Android M Nexus devices will be guaranteed to get updates for two years. Apparently the program will be applied retrospectively too, putting the Nexus 5 (October 2013) and Nexus 6 (November 2014) in line for the new mobile OS.What's more, Nexus pho