Sony Xperia C hard resetReset your Sony Xperia C C2305 Android phone
You can reset your device to its original factory settings, with deleting all data from your device memory. Before you perform a factory reset, make sure to back up any important data saved on your device.
If your phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset, click Reset phone and then Erase everything to format your phone.
To avoid permanent damage to your device, do not restart your device during the reset procedure.
Your Sonymobile Xperia C device freezes or has fatal errors
If your device freezes or hangs, you may need to close programs or reset the device to regain functionality. If your
device is frozen and unresponsive, press and hold the Power key for 10-15 seconds. The device will reboot automatically.
While using your device, be sure to back up important data. When disposing of your device, back up all data and then reset your device to prevent misuse of your personal information.
You can update your Sony Xperia C Sony C2305 locked or unlocked phone's firmware or reinstall your existing software using Sony PC Companion software
You can install Sony PC companion software: Connect your device to a computer using your USB cable. A screen should appear on your Xperia C phone asking if you want to install the PC Companion software. When prompted, follow the instructions in your device to launch the installation of PC Companion on the computer. Select Yes.