Sony Ericsson K500i and Arduino UNO

Other Hardware Device Hacking
1

hi,
I have problem with SE communication and SMS sending

in PUTTy it works, but in arduino doesn't.

It doesn't respond after AT command.

What can I do?

void setup()
{
  char serialData;
  String inputString;
  char inChar;
  Serial.begin(9600);
  Serial.println("AT");        
  //delay(1000);
  while(!Serial.available()){}
while (Serial.available())
{

   inChar = (char)Serial.read();
   inputString += inChar;
}
Serial.println(inputString);
delay(1000);

  Serial.println("AT+CMGF=0"); //puts the phone in pdu mode
  delay(1000);
while (Serial.available())
{
   inChar = (char)Serial.read();
   inputString += inChar;
}
Serial.println(inputString);

  
  
  delay(3000); //processing time
  //==============================================
  //send sms
  
  Serial.println("AT+CMGS=25");  // Number of octets
  

 
  delay(3000); //processing time
  Serial.print("0011000B918427673787F80000AA0CC8F71D14969741F977FD07"); 
  Serial.write("\x1A"); // ctrlZ
  delay(1000);
while (Serial.available())
{
   inChar = (char)Serial.read();
   inputString += inChar;
}
Serial.println(inputString);

  delay(3000); //processing time