I connected a GSM module with the Arduino UNO. The connections are as follows:

Gnd of gsm -----> Gnd of arduino

TX of gsm -----> pin 9 of arduino

Rx of gsm -----> pin 10 of arduino

GSM is powered from a 9V-1Amp wall adapter.

The GSM is performing according to all the AT commands (like making a voice call, hanging a call, answering a call) which are given, but it is displaying garbage values on serial monitor in response.

Here is the code:

#include <SoftwareSerial.h>
SoftwareSerial myserial(9, 10);

void setup() {
    Serial.begin(115200);
    myserial.begin(9600);
    myserial.println("ATDXXXXXXXXXX;");
    delay(30000);
    myserial.println("ATH");
}

void loop() {
    if (myserial.available()>0){
        Serial.println(myserial.read());
    }
}

What could be reasons for the GSM to output garbage values and how can I resolve it?