SIM 800L END CALL

Previously I am grateful if want to help me on the problem of 800L sim module. Where i want the 800L sim to call me in just 10 seconds then sim 800L will end the call.
But ending the call is not up to answer phone from sim 800L. :slight_smile:

#include <SoftwareSerial.h>
SoftwareSerial SIM800L(2, 3);
void setup() {
SIM800L.begin(9600);
 
 SIM800L.write("ATD081241903344;\r\n");
   delay(10000);
 SIM800L.write((char)3);
}

void loop() {

}

ATH?

I am used to using ATH. But can not. I mean when sim call me, my phone rang only 10 seconds just want to end. :confused: