For the problem of low external sound, you can try the following operations:

1. Check whether the sound setting is relatively low. It is recommended to press the volume up button and adjust the sound louder to try to solve the problem.

2. Check whether the speaker of the mobile phone is blocked. 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. Check whether the mobile phone is connected to the Bluetooth device and the sound is emitted from the Bluetooth device. It is recommended to turn off the Bluetooth switch and check.

4. Try changing the sound source to see if the external sound is normal. It is recommended to use the system ringtone test.

5. Third-party applications (such as WeChat, etc.) set the audio system to call status. If it is not restored, the audio channel will be confused, music will be emitted from the earpiece, and there will be no sound from the speaker. Please restart your phone to recover.

6. After the mobile phone has been used for a period of time, the external music or ringtones appear to be low and noisy, which may be caused by the dust filter of the speaker being clogged. If you accidentally come into contact with impurities such as water, drinks, oil, dust, etc. during use, the dust filter will become clogged and the speaker will sound low after being used for a long time. If you find dirt in the speaker hole, you can use a toothbrush or other small brush to gently brush the speaker hole at the bottom of the phone to try to remove dust and other impurities.

7. If none of the above methods can solve the problem, please back up important data and bring the purchase invoice to the outlet for testing.