For some reason, some commands return ERROR, like AT+QAUDCH=1 (headset). I tried unplugging the headphones and the mic and it didn't work. code:

#include <SoftwareSerial.h>
SoftwareSerial mySerial(7, 8); // RX, TX
void setup() {
void loop() {
  if (mySerial.available()) {
  if (Serial.available()) {

I can call people, people can call me and I can pick up but can't hear and they cannot hear me.

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