Microphone issues

i have the problem that when i call with whatsapp my earspeaker works and my microphone works but when someone is calling me normal my earspeaker and micorphone doesnt work. i tried many options i checked the receiver aswell no luck there nothing is broken or anything its just in whatsapp call they hear me and i hear them trough my earspeaker but with normal calls they cant hear me and i cant hear them.

Please help me it is very frustrating.