Why can’t I hear others during phone calls on my iPhone 12?

If you can hear others during phone calls but cannot hear you, it might be due to a faulty microphone, software glitch, or hardware problem. To troubleshoot, check the microphone and speaker settings, inspect the microphone for obstructions, clean the microphone openings, restart your iPhone, update iOS, reset all settings, check call audio settings, and ensure Bluetooth devices are not interfering with audio. If none of these solutions work, you may need to have your iPhone inspected by a professional or try using headphones with a built-in microphone.

lorij480 Said:

"Why can’t I hear others during phone calls on my iPhone 12?: Why can’t anyone hear me talking when i call them but i can hear them? Also i have to always have them on speaker because i can’t hear them if i don’t.. can someone please help me with this?"

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Troubleshooting Call Volume:

• Volume Output: If you Can't Hear a Person on a Call or Voicemail or if the Sound isn't Clear on your iPhone

• Volume Input: if your Microphone isn’t Working or People Can’t Hear you While you’re on a Cal

lorij480 wrote:

Why can’t anyone hear me talking when i call them but i can hear them?

Also i have to always have them on speaker because i can’t hear them if i don’t.. can someone please help me with this?

I'd guess there's a problem with the microphone. Contact Apple and arrange for them to run diagnostics:

Genius Bar Reservation and Apple Support Options - Apple