2. The cell phone speaker is broken, send the cell phone repair store to repair;
3. The phone has a software malfunction, the audio driver is damaged. Similarly, you can try to download the driver from the official website of the phone in question. If you still can't solve the problem, you need to return to the factory for repair;
4. Many Android cell phones have split sound channels, such as multimedia, playing games and so on. The first thing you need to do is to get your phone back on the road, and then you'll be able to get it back on the road, and then you'll be able to get it back on the road.
6. There are other reasons, such as the notification bar sound shortcuts are closed, etc., these can be solved by themselves