How to Factory Reset from code on Sony L55u Xperia Z3 4G TD-LTE?

  1. The device must be on.
  2. Use Dialer to enter the proposed code: *#*#7378423#*#*.
  3. When a new menu appears, select "Customization Settings".
  4. Next choose "Reset customization".
  5. Agree with the "Data will be cleared and factory data reset will perform" message.
  6. Press "Reset customization and reboot" to finish the process.
  7. That's all! After these actions, your phone data will be deleted.

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