iPhone X ear microphone not working in calls

What do you mean by holding normally. Holding the phone normally with the earpiece at your ear, the microphone should be right by your mouth. Holding it upside would put the earpiece at your mouth and the microphone at your ear. Take a look at this image. The earpiece, that you hear with, is right next to #1, the camera. The microphone and speaker are on either side of #4, the lightning port.

Hi teo214,

You might want to check out the following: If the microphones on your iPhone aren't working - Apple Support. If any of these methods dont work, you might have a hardware issue and would want to contact Apple Support (https://getsupport.apple.com) to book a service appointment or look at mail in options.

Cheers!

Mr. Helper

If you are attempting to speak to the top of the phone, that is a earpiece, not the microphone. While there is a secondary microphone at the back of the phone for noise cancelling purposes, the microphone at the base of the phone is for phone calls.

I'm sorry, but the earpiece is for you hearing people, not the other way around. People are not going to hear your clearly on a phone call if you are trying to talk into the earpiece. You need to speak into the microphone at the base of the phone. If WhatsApp works with the secondary mic, which is actually at the back of the phone, not the front, that is well and good, but that is not how it is supposed to work.

I think you are having a hard time understanding what I'm trying to tell you. If people can hear you when you talk while speaking at the base of the phone, it is working the way that it is supposed to.

What do you mean by upper microphone? Normal calls use the microphone at the base of the phone by the charging port.