Q: when I receive a phone call I cannot hear the caller only on speaker. Please help

Greetings michelfromhouston,

After reviewing your post, it sounds like you are not able to hear the other person on a phone call, but they can hear you. I would recommend that you read this article, it sounds like the trouble is with the receiver and this article may be able to help.

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

Thanks for using Apple Support Communities.
Take care