The reset or hard reset of the Xperia C5 Ultra E5553 mobile phone has been described below. Note however that the process of a factory reset of hard reset of the Xperia phones are all the same by code and by menu. You can also reset your phone by means of the software called the Xperia Companion also listed on this website.
The first method is the most commonly used one being the reset by software. This is done via the Xperia Companion software. This is normally done as the software allows you to backup all your settings and data before the reset. The other method used if you do not wish to keep your data and settings is doing the hard reset via code or via the menu of the Xperia mobile phone.
Hard Reset will erase all of your data
All described operations you are doing at your own risk.
Hard Reset Sony Xperia C5 Ultra E5553 with Menu
Hard Reset Sony Xperia C5 Ultra E5553 by Code