Can't get call / message from A7 gsm+gprs+gps module I am making a project using arduino uno &amp; A7 gsm+gps+gprs module.my circuit connection is like this:

A7 UTXD -&gt; arduino RX
A7 RTXD -&gt; arduino TX
A7 GND -&gt; arduino GND
A7 pwr_key -&gt; A7 VCC5.0


When i make call from my mobile to A7,it's ok.But i cannot get call/msg from A7.
Here is my code for making call:

char phone_no[]="phone_no";

void setup()
{
Serial.begin(9600);  
delay(200);
Serial.println("AT");
delay(1000);
Serial.print("ATD");
Serial.println(phone_no);
//Serial.println(";");
delay(10000);
Serial.println("ATH");
}

void loop()
{
}


What can i do now??? Please help me to fix it.I apologize for my poor english.
Increase your second delay to 2000 (ie. 2 seconds).

delay(2000);