should always be performed before a hard (factory) reset.
allows you to troubleshoot third-party apps that may be causing device issues.
temporarily disables all apps installed from the Google Play™ Store.
Once Safe Mode has been enabled, perform the following to test functionality:
Make and receive calls
Send and receive text messages
Browse the internet
Use available apps
If the issue persists, restart the device by powering it off and back on to exit Safe Mode, skip the steps below then proceed with further device troubleshooting.
If the issue doesn't occur while in Safe Mode, uninstall any recently installed or updated apps one by one.
For example, if you're having issues with your camera, start with apps that use the camera (e.g., QR reader, video chat apps, etc.).
After each removal, restart the device then re-test to see if removing that app resolved the issue.
Once the problem app has been identified, all other apps may be reinstalled.