How to send a sms with a Sony Ericsson phone

I checked again here is the sketch I used to test :

#include <NewSoftSerial.h>

NewSoftSerial phone(2, 3);

void setup() {
  Serial.begin(9600);
  Serial.println("Arduino has booted.");
  phone.begin(9600);
  Serial.println("phone connected");
  
}

void loop() {
  if (phone.available()) {
      Serial.print((char)phone.read());    
  }
  if (Serial.available()) {
      phone.print((char)Serial.read());
  }
}

I tried swapping rx/tx .... nothing.

I will try on a windows PC tomorrow...