Code by AllStorm#4557 - Sun Aug 18 2019 21:49:28 GMT+0000 (Coordinated Universal Time)

CodeBlockPaste.C

#include <Adafruit_FONA.h>


#include <SoftwareSerial.h>
SoftwareSerial SIM5320(10,11);



void setup() {
  Serial.begin(4800);
  SIM5320.begin(4800);

}

void loop() {

  while (SIM5320.available()){ 
    Serial.write(SIM5320.read());
  }
  while (Serial.available()){ 
    SIM5320.write(Serial.read());

}
}
-------And this is the code i've changed---------
#include <Adafruit_FONA.h>


#include <SoftwareSerial.h>
SoftwareSerial SIM5320(10,11);



void setup() {
  Serial.begin(4800);
  SIM5320.begin(4800);

}

void loop() {

  while (SIM5320.available()){ 
    byte b = Serial.read();
    if ( b == '' )
      Serial.write( 0x1a );
    else
      Serial.write(SIM5320.read());
  }
  while (Serial.available()){ 
    byte b = Serial.read();
    if ( b == '' )
      SIM5320.write( 0x1a );
    else
      SIM5320.write(Serial.read());

}
}