Sony Xperia Z3 Android 6.0 Marshmallow Easy Flash Guide
This video guides through Sony Xperia Z3 ROM flashing process. Which is really easy using Sony Xperia Flashtool.
Full written guide http://techcat.ca/threads/sony-xperia...
I will cover how to flash the latest Android 6.0 Marshmallow on to the Xperia Z3 (it's pretty much the same for all Xperia Z models). I'll be flashing to standard firmware so it will debrand my phone from MTS firmware at the same time.