There are two ways to factory reset the Sony Xperia C4 Dual back to the factory settings. The first is done by codes and the other is by way of the menu system. Note that once you reset the mobile phone back to its factory settings all the data on your phone will be gone. You will need to make use of the Xperia PC Companion to backup all your data before you reset the phone. This way you can restore the data again after the reset.
You will find the hard reset for the Sony Xperia C4 Dual listed below. Note that once you have started the process of reset it does take a few minutes for the process to complete. The phone will restart once it is done so always ensure that you have at least 50% of the battery charged or best yet fully charged. You dont want the phone to lose power during the rest of it might become a costly mistake.
You can search this website for more information about the Xperia mobile phone range. You will note that all of them have the option of either the code reset or the menu reset. Again, backup your data beforehand and also ensure that your remember your APN settings for connecting to the internet again once it is done..
Hard Reset will erase all of your data
All described operations you are doing at your own risk.
Hard Reset Sony Xperia C4 Dual using the Menu
Hard Reset Sony Xperia C4 Dual by Code