Arduino  - function to get reply after each AT command send to phone

Hello,

I'm connecting a Sony Ericsson k700i phone to Arduino Uno. I'm able to send AT commands but cannot get all the bytes when requesting a SMS read. I wrote a small function to execute AT commands and get reply but it does not show the reply from phone.

What am i doing wrong? Could someone please help me correct this code to make it work?

I'm trying to reproduce the schetch from http://www.power7.net/apk_file/SmsRemoteControl.pde

Thanks a lot!

With the function below I want to read the value of first SMS and if the pdu format contains a specific string I want to turn on a led.

The function code:

/*

EX:  executare_comanda_at_v2("AT");

executare_comanda_at_v2("AT");

executare_comanda_at_v2("ATE=0");//Echo off

executare_comanda_at_v2("AT+CPMS=\"ME\",\"SM\"");

executare_comanda_at_v2("AT+CMGR=1");

*/

void executare_comanda_at_v2(String comanda_at) {

    String readString="";//format readString...

    char c=NULL;

      Serial.begin(9600);

      Serial.println("--START COMANDA--");

      //delay(3000);

      readString="";//format readString...

Serial.println(comanda_at);

    // read phone reply if available

   while(Serial.available() > 0)

           {

              Serial.print( c=Serial.read());

               readString+=c;

           }

              //delay(1000);

              Serial.println(readString);//serial monitor display sms pdu format

               //delay(3000);

             if (readString.indexOf("026F37")>0)// if admin number=true  and  sms pdu on=true

             {

                digitalWrite(indicatorPin, HIGH);//only for test led on

                //pulsesIR_Toyotomi.SendACCodeOn();//AC Toyotomi on

                delay(5000);

                //sendsms_temp();//send sms to admin temperature room

                digitalWrite(indicatorPin, LOW);//only for test

             }

             Serial.println("--STOP COMANDA--\r\n");

             Serial.flush();

             delay(3000);//delay start loop again for check new sms...

}