Try the following methods to solve the problem:

1. Restart the phone. First of all, the easiest way is to try restarting the phone. Sometimes the volume returns to normal after the phone is restarted.

2. Check the software. Check to see if the problem is caused by any software installed. Nowadays, many software will change the original sound volume, which is quite overbearing. Then you need to think about which software you have downloaded recently. If you are not sure, you can go to the Safe Phone Manager to set permissions for all software, or delete these software directly. .

3. Restore factory settings. Sometimes there is a problem with the system, which will cause various problems with the phone, so no matter how unwilling you are, you need to restore the factory settings. Remember to make a backup before restoring to factory settings.

4. Clean the phone receiver or speaker. If the phone is sweaty or used for a long time, the dust filter of the earpiece may be blocked, causing the sound to be too low. You can try wiping it with a cotton swab dipped in alcohol. The speaker dust filter is also operated in the same way.

5. Send for inspection and repair. If none of the above methods work, it may be that the audio circuit is faulty or the speaker is burned out, and you can only send it to after-sales service and ask a professional to repair it. If the phone is still under warranty, it can be repaired.

Notes:

1. Please confirm the type of volume adjusted by pressing the volume up button. If the adjustment type is call volume rather than media volume, it means that it is a third-party application (such as WeChat, etc.) Set the audio system to call status and do not restore it. This will cause the audio channel to be confused, music will be emitted from the earpiece, and there will be no sound from the speaker. You can use WeChat to make a voice call to return to normal, or you can restart your phone to restore it.

2. Please check whether the speaker of the mobile phone is blocked, and please remove the obstruction. For example, when holding the phone horizontally, your fingers block the bottom of the speaker (the speaker of some mobile phones is on the back, and the same is true if it is used on the bed). Unofficial standard protective cases may also cause the speaker to be blocked.

3. Please confirm whether the Bluetooth device is connected. If it is connected, the sound will be emitted from the Bluetooth device. It is recommended to turn off the Bluetooth switch and check.