SIM800L Message is Delivered But Not Displayed in Mobile

[gcjr]

@Dinesh006

  sim.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);
  //Serial.println ("Set SMS Number");
  sim.println("AT+CMGS=\"" + number + "\"\r"); //Mobile phone number to send message
  delay(1000);
  String SMS = "Hello, how are you?";
  sim.println(SMS);
  delay(100);
  sim.println((char)26);// ASCII code of CTRL+Z

i'm not familiar with sms messaging (am curous)

you have delays. shouldn't the message be an uninterrupted stream of bytes?

not sure what ctl+'z' is expected to represent (depends on keyboard/application reading keyboard). 26 is 'SUB' (ascii chart)