3g ITEAD sim5216A not talking back to arduino uno

hi guys,

i have itead sim5216a 3g shield onto of arduino uno. code below

im have trouble getting talk arduino uno @ all. have configured jump pins on top of board pin 7 rx , 6 tx as

i have connection network 4th light on itead flashing.

apart from can tell code should returning unit

also please note sssss , fffff come on serial monitor.

any appreciated, im new 3g stuff






#include <softwareserial.h>
softwareserial gsm(6,7);

void setup(){
 
  serial.begin(19200);
  gsm.begin(19200); //gsm
  delay(2000);

serial.println("sssss");
gsm.println("at\r");
delay(100);
showserialdata();
gsm.println("at+creg?\r");
delay(100);
showserialdata();
delay(300);
gsmkonf();
delay(100);
showserialdata();
serial.println("fffff");

}
//do nothing
void loop() {}
 
////////////////////////////////////////////////////////
void gsmpower()
// software equivalent of pressing gsm shield "power" button
{
  digitalwrite(7, high);
  serial.println("power reset start");
  delay(1000);
  digitalwrite(7, low);
 
  serial.println("power reset end");
  delay(5000);
}
void showserialdata()
{
 while(gsm.available())
   serial.write(gsm.read());
}

void gsmkonf (){

 gsm.print("at+cmgf=1\r");
 delay(100);
 gsm.print("at+cnmi=2,2,0,0,0\r");
 delay(100);
  }
 

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