Clear App Cache / Data:

NOTE: If one (or more) of your applications doesn’t work as it should, it crashes, freezes, or takes up too much space then you might be able to fix these issues by clearing the app’s cache or data.

WARNING! Clearing an app’s data will delete all the personal information stored within the app, including login information, settings, credit card information, saved games, profiles etc. As such you should try and fix the app’s behavior by first clearing its cache. This can have similar beneficial effects without losing any personal data.

  1. Tap “Apps” on the home screen
  2. Go to “Settings”
  3. Swipe to “Device”
  4. Tap “Apps” and swipe to “Downloaded”, “Running” or “All”
  5. Tap the desired app
  6. Tap “Clear cache”
  7. If necessary, tap “Clear data” > “OK”

Reboot in Safe Mode to Remove an App:

NOTE: In case one of your third party apps is causing issues and prevents you from uninstalling it then you should be able to easily remove it by first rebooting your phone in Safe Mode. In this mode all third party apps are disabled.

  1. To enter safe mode, first press and hold the “Power” button (while the phone is turned on)
  2. Tap and hold the “Power off” option in the dialog box
  3. Tap “OK” to confirm and reboot your phone in Safe Mode (once the phone restarts you should see a “Safe Mode” label in the lower-left corner of the screen)
  4. To remove an app, go to “Settings”
  5. Swipe to “Device” and tap “Apps”
  6. Swipe to the “Downloaded” section and select the desired app
  7. Tap “Uninstall” > “OK”
  8. To exit safe mode, press and hold “Power”, tap “Restart” > “OK”

Wipe the Phone’s Cache Partition:

NOTE: In case your phone doesn’t work as intended and you are considering master resetting it, you might want to try and wipe the cache partition first. This way you might fix the issues without losing any personal data stored on the device. To clear the cache:

  1. Power off your phone
  2. Press and hold “Power” for a couple of seconds, then press and hold “Volume Up” (keep both buttons pressed)
  3. When the “Select Boot Mode” screen appears, release the buttons
  4. From the menu, make sure the selection arrow points to “Recovery Mode” and press “Volume Up” to select the option
  5. After several seconds an android with an exclamation mark in a yellow triangle should appear
  6. From this menu, press and release “Volume Up” and “Power” at the same time
  7. You should now see the “Android system recovery” menu
  8. Press “Volume Down” repeatedly to navigate to and highlight “wipe cache partition”
  9. Press “Power” to select the option

NOTE: If clearing the cache did not help and you need to master reset the phone you can visit this link for a full guide.

See More: ZTE Obsidian: Clear App Cache / Data; Wipe Cache Partition; Reboot in Safe Mode