Sony Xperia M hard resetReset your Sony Xperia M 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.
Your Sonymobile Xperia M 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 M Sony C1904 / C1905 / 2004 / C2005 locked or unlocked phone's firmware or reinstall your existing software using Sony PC Companion software
You can install Sony PC companion software by connecting your phone to your computer. A screen should appear on your Xperia M phone asking if you want to install the PC Companion software. Select Yes.