Hard Reset SONY Xperia X F5122

First method:

1. First of all, download the Xperia Companion on your PC.
2. You may find this app here www.support.sonymobile.com/global-en/tools/xperia-companion/
3. Intall and launch the application on your computer.
4. Turn off your device and connect your phone to PC by using Micro USB Cable.
5. Open the Xperia Companion and from the Main Menu choose Software repair.
6. Then go through the confirmation proccess by selecting appropraite option.
7. As soon as the following menu appear connect turn your smartphone into a Fastboot Mode.
8. In order to do it you have to hold down the Volume Down and while holding this key connect your phone with PC by using Micro USB cable.
9. Read imporatnt infomation about process and select Next button to begin the factory reset operation.
10. When the opration is completed disconnect your device.
11. Finally, turn on your SONY by holding down the Power button.
12. Success! The hard reset has just been completed.

Second method:

1. In the first step hold down the Power button for a short while to turn on the smartphone.
2. Afterwards go to Settings and then to Backup & Reset.
3. Then selec Factory Data Reset and tap Reset Phone.
4. Choose Erase Everything if you are sure you want to clear all your data.
5. Congratulations! The hard reset has just been performed.

Third method:

1. Firstly, make sure taht your smartphone is siwtched on.
2. In the next step open the phone's dialer and type in: *#*#7378423#*#*.
3. From the menu which should appear on the screen choose option Customization Settings and then Reset customization.
4. Confirm information: "Data will be cleared and factory data reset will perform".
5. Accept by pressing Reset customization and reboot.
6. Well done! You have just performed the hard reset operation

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