Receiver doesn't hear me when I make calls only

Hi there, the problem is that I can hear the receiver but he can't hear me when I make calls with the cell phone only, but he hears me when he makes the call, I have tried to put the Sim card in other phones and there was the same problem. How can I solve this problem?

Note: don't concentrate on the mobile that I have chosen in the problem because I tried to put the Sim card in other mobiles and the problem remained