Clear App Data/Cache:

NOTE: If an app causes issues or takes up too much storage, you can try fixing it by clearing the app’s data and cache.

WARNING! When clearing an app’s data, all of your personal data stored within the app will be deleted. To avoid this, clear the app cache ONLY.

  1. Open “Settings
  2. Access “Apps & Notifications” and switch to “See all apps
  3. Select the desired app and tap “Storage
  4. Tap “Clear cache
  5. If clearing the app cache didn’t fix the issues, tap “Clear data” (Check the WARNING above)

Reset Network and App Settings, Factory Reset the Phone:

NOTE: Make sure you’ve backed up all of your data before factory resetting the phone or otherwise you will lose it.

  1. Launch “Settings
  2. Go to “System” and tap “Reset options
  3. To reset network settings, tap “Reset Wi-Fi Mobile & Bluetooth
  4. To reset app settings tap “Reset app preferences” > “Reset apps
  5. To factory reset the phone, tap “Erase all data (Factory Reset)” > “Reset Phone” > “Erase everything

Reboot to Safe Mode and Remove Apps:

NOTE: If a third-party app causes issues and prevents you from removing it, you should be able to remove the app while in Safe Mode. In this mode, all third-party apps are disabled by default.

  1. Press and hold “Power” on the home screen
  2. Tap and hold “power off” from the power management pop-up and accept to boot to Safe Mode
  3. Open “Settings” and go to “Apps & Notifications
  4. Switch to “See all apps” and select the desired app
  5. Tap “Uninstall” > “OK
  6. To exit Safe Mode, simply reboot the phone normally

See More: Alcatel ONYX: Clear App Data/Cache; Factory Reset; Reboot to Safe Mode