Please follow steps below for troubleshooting:
- Close all apps running in background by tapping recent apps key and Clear all.
- Perform Boost:Slide down the screen from upper area to access Quick settings and then tap Boost.
- Reboot your tablet.
- Clear cache of apps:Settings > Apps > (select an app) Clear cache.
- Uninstall apps that are not often used:Settings > Apps > (select an app) Uninstall.
- Update apps to latest:Play Store > upper-left menu icon > My apps > UPDATE ALL.
- Update firmware to latest version:Settings > About > System update > Check Update.
- Re-install apps:Settings > Apps > (select an app) Uninstall and then re-install it in Play Store.
- It is recommended not to use your tablet while it is charging.
- If there is weak Internet connection on your tablet, it may cause crash of apps that need good Internet connection