We understand your concern and be assured will help you out to resolve the issue. Be assured, in order to resolve the sound problem kindly follow below given steps:-
1. Disconnect all accessories and remove any third-party case form your phone and check device volume settings if its full or not.
2. Check mute all sound option:-Settings >> Accessibility >> Hearing enhancements >> Disable Mute all sounds (if enabled).
3. Check device in safe mode:- Using Safe Mode on a Samsung phone allows you to force the device to run the essential operating system, and disable most 3rd party applications. To enter in safe mode:- Press and hold the Power key, when Power off icon appears>Press and hold the power off icon. To Exit safe mode:- Restart the device.
4. Reset the device:- Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite. Tap on Settings>Tap on General Management>Tap on Reset.
If the issue still persist kindly visit your nearby service center once lockdown issue is over, for the physical inspection of your device.
Please be assured, our team will surely help you with this.
