1. Load Xperia Companion to your computer. This can be done here www.support.sonymobile.com/global-en/tools/xperia-companion/.
2. Install the application to your computer.
3. Then turn off the phone and connect the phone to the PC using the Micro USB cable.
4. Open Xperia Companion and in the main menu, select Software Repair.
5. Confirm the process by selecting the appropriate option.
6. When the next menu appears, go to FastBoot Mode.
7. Hold down the Volume button button Connect the phone to the PC using the Micro USB cable.
8. Press the next button to start the recovery operation of the factory settings.
9. When the operation is completed, disconnect your device.
Hard Reset - advantages and disadvantages Sony Xperia 1 II?
In simple words, Hard Reset means hard resetting the phone. As a result, the system automatically returns to the factory settings and the system is completely cleared. Contacts, correspondence, application, files, search queries, passwords - all of this is deleted from the device's memory.
Benefits of Hard Reset:
The ability to reset the phone to factory settings. Removal of viruses that interfere with the normal functioning of the device. Solving various problems that arose on the device after installing some applications and did not disappear after uninstalling them.
Disadvantages of Hard Reset:
Your files and data will be irretrievably lost. The need to back up all data and contacts. In rare cases, it is impossible to remove some viruses from Android, even after a hard reset.
What needs to be done before the Hard Reset operation.
So that after a hard reset the phone is not blocked by the FRP, make sure that you know the login / password to your google account. You can sign out of your google account before resetting. In this case, after performing a factory reset, you can immediately use your device. If after a hard reset you cannot use the phone because the phone is locked by FRP, then you need to use the instructions for bypassing the FRP lock for your phone model. Owners of new phone models do not get to bypass the protection of the FRP and will need to contact the official service center.
After performing a hard reset, your device will be completely wiped clean. Everything that was in the memory of your device will be deleted.
What can be done to avoid losing important information?
If important information (contacts, sms, photos, videos) remains in the memory of your device, then there are the following options to save it:
Synchronize your phone with Google contacts, Google drive. Create a backup using Titanium Backup or other programs. Transfer important data to your PC using service programs for your smartphone model.