One of the features of Android N that Google shared at Google I/O 2016 is Seamless Updates. This is a feature borrowed from Chrome OS and if you were excited by this news, you might be in for some disappointment because as it turns out, unless you are planning on buying a new phone, your existing handset will not be able to take advantage of it.
So what are Seamless updates? As the name implies, seamless updates are when your handset receives an update and installs it in the background without you, the user, having to do anything. When you reboot your phone, the new update will be installed, which means that you won’t have to wait for update prompts and so on.
It sounds simple enough but unfortunately due to the technical requirements needed to pull it off, Existing Devices won’t be able to use it. This is because seamless updates requires the handset to have two partitions, kind of like partitioning a hard drive, where one is where is in use by the phone at all times, and the other remains free to be updated by the system.