S21 Freezing Screen, Audio freezing but video playing, No transmitting (receiving + transmitting) audio on calls

Troubleshooting Persistent Device Freezing and Audio Issues on Your Samsung Galaxy S21 FE 5G

Experiencing frequent device freezes and audio problems can be frustrating, especially when they interfere with everyday communication and entertainment. If your Samsung Galaxy S21 FE 5G (model S215G) exhibits symptoms such as the screen freezing for 30 seconds to a minute, inability to transmit or receive audio during calls, and lack of audio in various apps despite video playing, this guide aims to help you diagnose and resolve these issues effectively.

Understanding the Symptoms
– System Freezing: The device becomes unresponsive for extended periods.
– Call Audio Failures: No sound is transmitted or received during calls via different apps.
– App Audio Issues: Video plays without audio across various platforms (TikTok, YouTube, Reddit, Discord, Twitter).
– Storage and Cache Management: Clearing app cache and storage did not resolve the problems.
– Safe Mode Behavior: In Safe Mode, apps work without audio issues, but problems reoccur after exiting Safe Mode.

Potential Causes
– Software glitches or outdated system software.
– Corrupted cache or residual data in apps.
– Compatibility issues with certain apps or after system updates.
– Hardware malfunction, possibly related to speakers or internal components.
– Background processes interfering with performance.

Step-by-Step Troubleshooting

1. Restart Your Device
   A simple restart can clear temporary glitches:
2. Hold down the power button.

3. Select “Restart” and wait for the device to reboot.

4. Check for Software Updates
   Ensuring your device runs the latest software can fix bugs:

5. Go to Settings > Software update.

6. Tap “Download and install” if updates are available.

7. Clear App Cache and Data
   Since cache clearing didn’t help previously, consider doing this again for specific apps:

8. Settings > Apps.
9. Select the app (e.g., YouTube, TikTok).
10. Tap Storage > Clear Cache.

11. If issues persist, tap “Clear Data,” but note this may erase app settings.

12. Boot into Safe Mode
    Since apps work in Safe Mode, this indicates third-party apps might be causing conflicts:

13. Power off the device.
14. Turn it on and hold the volume down button until the Samsung logo appears.
15. Release the button; “Safe Mode” will appear at the bottom left.
16. Test calling and app audio.

17. To exit Safe Mode, restart your device normally.

18. Disable or Uninstall Recently Installed Apps
    Identify and