Problem using Http result to make a phone call

Official Hardware Retired GSM Shield
2

Hello everyone
i have been able to strcpy the result to a variable, i null terminated it and tried to make a call to the variable but the call is not going through, here is the code

if ( contentLength <= 0 ) {
         char num [32];
        strcpy(num, buffer);
        buffer[ pos ] = 0;
        Serial.println(num);
       sendGSM("AT+CMGF=1");// changing to sms mode
       delay(2000);
      char n=sprintf( buffer, "ATD+%s;", num );
      printf("%s\n", n);
       delay(20000);
        resetBuffer();

Here is the result i got in the serial monitor

Ignoring echo: AT+SAPBR=3,1,"Contype","GPRS" 
Ignoring echo: AT+SAPBR=3,1,"APN","APN" 
Ignoring echo: AT+SAPBR=3,1,"USER","FLAT" 
Ignoring echo: AT+SAPBR=3,1,"PWD","FLAT"
Ignoring echo: AT+SAPBR=1,1 
Ignoring echo: AT+SAPBR=2,1 
Ignoring echo: AT+HTTPINIT 
Ignoring echo: AT+HTTPSSL=1 
Ignoring echo: AT+CGATT? 
Ignoring echo: AT+HTTPPARA="CID",1 
Ignoring echo: Received HTTPACTION 
HTTPACTION type is 0, 
HTTPACTION result is 200, 
HTTPACTION length is 12 
Ignoring echo: AT+HTTPREAD=0,12 
Received HTTPREAD 
HTTPREAD length is 12 
HTTPREAD content: 91xxxxxxxxxx 
OK
91xxxxxxxxxx 
OK

Its show okay but the call doesn't go
Any help or idea will be appreciated, thanks.