Q: I have an iphone6 and since morning I am not able to hear anything when I get a cll

Howdy Saurav80,

It sounds like you arent hearing anything out of the reciever speaker, but speakerphone and headphones work fine. I would use the troubleshooting in the following article to help determine what may be the cause:

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

Thank you for using Apple Support Communities.

Regards,

Sterling