The solutions to the sudden decrease in the sound of the Apple 7 handset are as follows:

1. Turn the volume to the maximum on the side of the screen of the iphone7, or go to the settings of the mobile phone system and turn the volume of the sound to the maximum.

2. Open the settings of iPhone7, enter General, and find the "phone whistle elimination" option on the accessibility page to turn it on.

3. Go to the Assistive Touch to open the virtual button, click on it to close the mute button inside and reopen it. Then test whether the sound is back to normal.

4. When the iphone7 phone is turned off and restarted, sometimes I don't know the reason, but when it is restarted, the problem of low receiver sound can be solved.

5. Check whether the microphone of the mobile phone device is blocked.

6. If the sound is still low, you can contact the after-sales service to check whether there is a fault in your mobile phone hardware.

apple 7 has a low voice when making a phone call. solutions:

1. turn on "general"-"auxiliary functions" in "settings" of iphone7p, and then turn on and enter.

2. turn off "telephone noise cancellation".

other methods:

hearing aid --> Turn on the "hearing aid mode", and then press the volume button when making a phone call to turn up the volume.