I have a problem with using the WhatsApp from my iPhone 7 plus. The voice message can barely be heard! I made many attempts like reset the iPhone and the WhatsApp but the problem still there. I can send voice message via all other apps and iMessage and from the same iPhone and the voice is clear except the WhatsApp. I just tried to use the headphones and it worked. Would you please fix this problem as I heard that many people who have iPhone 7/plus face the same problem. Thanks