As expected, this week held Google I / O 2015 developer conference, Google has finally released a new Android M operating system. Although the conference Google simply mentioned several important features, but its official upgrade log is a few pages long. The good news is, Android M developer preview version has been officially pushed, all using the pro-son phone Nexus 5, Nexus 6 and Nexus 9 and other users have been able to experience directly ahead.
