Q: Cant hear calls

Hello Lucretia70,

Thanks for using Apple Support Communities.

From your post I see that you cannot hear other callers when on a phone call, but they can hear you fine.  This indicates there's an issue with the receiver on your iPhone.  To troubleshoot the receiver, please follow the steps in the article linked to below.

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

Cheers,

Alex H.