My phone will ring but I cannot hear the caller and the caller cannot hear me. I have a plug in the area for headphones so I know it is not dust in there. I have reset my phone and still cannot hear when I get a call.
Try to reset your device. This won't delete your data stored on this device.
Alternatively, you may go to Settings - General - Reset - Reset All Settings
https://support.apple.com/en-us/HT201559
If this does not help, restore your device to factory settings. Note that this will erase the data from your device.
Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.
When I get a call I can't hear caller and caller cannot hear me
