Receiving Blank SMS with SIM800A GSM Module

Hello!
I am working with an Arduino UNO and a SIM800A GSM Module. I am able to receive an SMS from the module, but it is a blank text message as shown in the attached image. What might be the issue?

This is the code that I am using:

#include <SoftwareSerial.h>
 
//SIM800 TX is connected to Arduino D8
#define SIM800_TX_PIN 8
 
//SIM800 RX is connected to Arduino D7
#define SIM800_RX_PIN 7
 
//Create software serial object to communicate with SIM800
SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);
 
void setup() {
  //Begin serial comunication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);
  while(!Serial);
   
  //Being serial communication witj Arduino and SIM800
  serialSIM800.begin(9600);
  delay(1000);
   
  Serial.println("Setup Complete");
  Serial.println("Sending SMS");
   
  //Set SMS format to ASCII
  serialSIM800.write("AT+CMGF=1\r\n");
  delay(1000);
 
  //Send new SMS command and message number
  serialSIM800.write("AT+CMGS=\"977937XXXX\"\r\n");
  delay(4000);
   
  //Send SMS content
  serialSIM800.write("TEST");
  delay(1000);
   
  //Send Ctrl+Z / ESC to denote SMS message is complete
  serialSIM800.write((char)26);
  delay(1000);
     
  Serial.println("SMS Sent");
}
 
void loop() {
}

Hello Rishika,

I also got same response first time as i used to send a sms to specific mobile which was of i guess “OPPO” company when i tried to send to another mobile i got the sms.

Can you provide the connections with what power supply you are using for sim800A

I am doing same with Arduino UNO but sim is not registring on network.