Nexus, the son of Google, is already eating 7.0 nougat. As the flagship mobile phone in 2014, Samsung Galaxy Note4 and Note4 Edge of AT&T in the United States are still running Android 5.0 lollipop system. However, this month, they will usher in the upgrade of Android 6.0.1 system. There will be a series of new functions, including Google Now On Tap Doze mode, more emojis expressions, etc.

System updates have always been a pain for Android devices, and endless waiting may even lead to no upgrade at all. For example, Samsung Galaxy Note3 is still running Android 5.0, and 6.0 seems to be far away.