A Nexus 5, for example, receives the latest android updates instantly.
Is it possible to get this pure version of android on any custom android phone (like Galaxy S3)?
Do note I DO NOT mean:
Something like Cyanogenmod. While it does eventually give latest android update it is not instant like on Nexus devices. Default google apps are also not installed out of the box or updated automatically.
A solution that keeps requiring manual install (like a custom mod maybe) everytime a new official version of android is out. I am looking for a solution where after manual intervention once, stock android will be installed and I will receive android updates instantly.
A specific solution to Galaxy S3. I'm just looking for the term used to have instant automatic updates on your device, I'm very new to Android sorry.