I have a similar issue on the Nothing phone (2). About half of the time the the person on the other end does not hear me, the other times, it is working as expected. It only happens on normal phone calls. Calls with WhatsApp and other messaging apps are working without any problem. I tried to reboot the phone some times, without any improvements. I cant ’t say the exact time it stopped working but it could be related to the last update some weeks ago. I’m on Nothing OS 2.6 Pong-U2.6-241016-1700-EEA.
