Apple 6 plus put the phone on the speaker, and the other party couldn't hear the sound.

This may be your mobile phone. You turn off the volume of the phone. You can try to increase the volume first. Another possibility is that the microphone hole of your mobile phone may be blocked or damaged by foreign objects, dust and debris.

If the mobile phone speaker is silent, I suggest you try the following methods:

1, turn up the volume to see if it is normal.

2. Check whether the speakerphone volume is normal, and eliminate abnormal resources such as video and music.

3. Restart the phone to see if it is restored.

4. Back up data (contacts, text messages, etc. ) and restore the factory settings.