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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 "Backup & reset"
Slide two fingers downwards starting from the top the screen.
Press the settings icon.
Press Backup & reset.
2. Restore factory default settings
Press Factory data reset.
Press RESET TABLET.
Press ERASE EVERYTHING. 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.