Q: i use iphone 5s. when i receive call i dont hear any sound but if he call second time then i can hear voice clearly.

Hello mai murad,

I'm sorry to hear you are having these issues with your iPhone. If you continue to have issues receiving calls on the first call, you may find the troubleshooting steps outlined in the following article helpful:

If you can't make or receive calls on your iPhone - Apple Support

Sincerely,

- Brenden