Hard Reset SONY Xperia C C2305 S39h

Second method:

  1. Please download flashtool from Sony website: http://developer.sonymobile.com/services/flash-tool/
  2. Install drivers for your USB data cable.
  3. Then power off your device.
    Hard Reset SONY Xperia C  C2305 S39h
  4. After that press and hold Volume Down, and connect to USB cable.
    HardReset SONY Xperia C  C2305 S39h
  5. Now follow the instructions in your screen, and accept appropriate options.
  6. That's all.

Hard Reset SONY Xperia L C2105 - Reset All SONY Xperia - video

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.

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