If your phone's sound has disappeared, there are a few things you can do to try to fix the problem.
First, restart the appliance by holding down the power button until the switch-off option appears. When your phone turns back on, check if the problem has been solved.
Second, check all the sound settings on your device. Make sure that the volume is not turned down and that all sound-related settings are activated. If any audio profiles are active, switch to another one and see if that helps.
Thirdly, check that the headphone jack or other audio ports are not dirty or full of dust. If they look dirty, use compressed air to try to clean them.
Fourth, if all else fails, try restoring your phone's software or operating system. This should be a last resort, as it can erase all the information on your device.
If none of these solutions work, you may have to take your phone in for repair or replace the audio components completely. In some cases, the problem may be a hardware fault with no easy fix.
Whatever it is, it's important to take care of your device and make sure all the sound settings are working properly. If you follow these steps, your phone's sound should start working again in no time!