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If your tablet gets slow or doesn't work as it usually does, it may help to restore the factory default settings. All settings and configurations you've made on your tablet are deleted.
1. Find "Factory data reset"
Press Advanced settings.
Press Backup & reset.
Press Factory data reset.
2. Restore factory default settings
Press RESET TABLET.
Press RESET TABLET. Wait a moment while the factory default settings are restored. Follow the instructions on the screen to set up your tablet and prepare it for use.