Selling your Sony Xperia Z3 Plus and needing to clear all the data? You can achieve this using two methods. You can backup the data from the phone before you reset the phone. This makes the second method the easiest by doing it via software such as the Xperia PC Companion.
Note that the software can be used on any Sony mobile phone however it works best for the Xperia range of mobile phones from Sony. The instructions for a hard reset on all the Xperia phones via the software is done in the same form and fashion. The exact procedures are used by all.
Hard Reset will erase all of your data
All described operations you are doing at your own risk.
Hard Reset Sony Xperia Z3 Plus Option 1:
Hard Reset Sony Xperia Z3 Plus Option 2:
From there you simply click on update
It will update your software if older but if the software it already up to date then the next option is to click repair.
Now the next screen the resetting of the mobile phone will begin.
You mobile phone will now be hard rest.