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Restore the factory default settings
If your mobile phone is slow or in any other way doesn't work or respond as well as it should, it may help to restore the factory default settings. This deletes all configurations you've made in your mobile phone.
1. Find "Reset phone"
Press Settings.
Press System.
Press Reset.
Press Reset phone.
2. Restore factory default settings
Press RESET PHONE.
Press RESET PHONE and wait a moment while the factory default settings are restored. Follow the instructions on the display to set up your mobile phone and prepare it for use.