Please refer to the solution for low speaker volume on vivo mobile phones:

1. Restart the phone: Restart the phone first and check whether it returns to normal.

2. Adjust the volume: Check the media volume. During playback, you can press the volume up button to increase the volume to test.

3. Comparative test software: Comparatively test different software, check the sound condition, and determine whether it is caused by the software itself.

4. Confirm whether the speaker is blocked: Check the speaker (external amplifier) ??to see if the sound hole is blocked by foreign matter or dirt? If the sound hole is blocked, please bring your mobile phone to the customer service center for help.

5. Confirm the mobile phone signal: Check whether the mobile phone signal is good and stable. If the signal is weak, the call quality will be affected.

6. Upgrade the system version: The new system version has improved compatibility and stability, and optimized performance. Please go to Settings--System Upgrade (for some models: Settings--My Device-- iQOO UI version), check the system version information. If it is not the latest version, it is recommended that you upgrade your experience.

7. Restore factory settings: Abnormal system configuration information may cause malfunctions. It is recommended that you back up important data and then reset the phone configuration information.

How to operate: Enter Settings--System Management--Backup and Reset--Restore all settings (for some models: Settings--More Settings--Restore Factory Settings--Restore All Settings), Follow the on-screen prompts.

Restoring all settings will not delete any data or media files. It will restore all settings of the phone. Some third-party application accounts require re-logging in. Please confirm that it will not affect your use of some third-party software before proceeding. operate.

8. It may be caused by damage to the internal hardware of the mobile phone. You can take the mobile phone to the service center for processing. Enter the browser to search the vivo official website--service--service center--view all--select the province and city to check the local service center. Service center address and contact information.