Xperia Z3 to update

[acc.personale]

Up to which version of Android operating system can the Xperia Z3 be updated, currently with Marshmallow 6.0.1 unrooted, keeping it running at 100% and without having problems of any sort?

And where can I find a good 'guide' to follow in order to be able to make this update?

 

[saedkebbeh]

Up to which version of Android operating system can the Xperia Z3 be updated, currently with Marshmallow 6.0.1 unrooted, keeping it running at 100% and without having problems of any sort?

And where can I find a good 'guide' to follow in order to be able to make this update?

There is a ROM with Android 8.1
It's quite stable, lacking video recording
Hold on to marshmallow currently until the creation of a stable rom (fully functional)