Q: I phone 6 volume low. cannot hear conversation clearly

Hello Susan,

Thank you for using Apple Support Communities. 

I understand that you are having difficulties hearing someone on your phone. Here are a couple of article that should help you troubleshoot this issue. 

If you can't hear a person on a call or voicemail or if the sound quality is poor on iPhone - Apple Support

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

Regards,
Jeff D.