Execution time problem in sending message

[Shengton Fuergo]

Hello, good morning.

I'm having a problem with my Timer in sending.

I typed and sent this message using my SMS application: How was your school today?

The 1st attempt is: 554 milliseconds
The 2nd attempt is: 577 milliseconds
The 3rd attempt is: 563 milliseconds
The 4th attempt is: 549 milliseconds

My question is: Why is it the timer shows different milliseconds?

Here's my code:

      if(command == send)
      {
          String mno=number.getString();
          if(mno.equals(""))
          {
              alert = new Alert("Alert");
              alert.setString("Enter Mobile Number!!!");
              alert.setTimeout(2000);
              display.setCurrent(alert);
          }
          else
          {
              startTime = System.currentTimeMillis();
              data = file();
              text = message.getString();
              StringTokenizer stText = new StringTokenizer(text," ");
              while(stText.hasMoreTokens())
              {
                  int found = 0;
                  readWord = stText.nextToken();
                  StringTokenizer st = new StringTokenizer(data,"|");
                  while ((st.hasMoreTokens()) && (found==0))
                  {
                      txtspkWord = st.nextToken();
                      realWord = st.nextToken();
                      if(txtspkWord.equalsIgnoreCase(readWord))
                      {
                          found = 1;
                      }
                  }
                  if(found==1)
                  {
                      newtxt = newtxt + "" + realWord + " ";
                  }
                  else
                  {
                      newtxt = newtxt + "" + readWord + " ";
                  }
              }
              temp = newtxt;
              newtxt = "";
              capital = capitalize(temp);
              message = new TextBox ("Message", capital, 960,TextField.ANY);
              message.addCommand(ok);
              message.addCommand(clear);
              message.addCommand(exit);
              message.setCommandListener(this);
              alert = new Alert("");
              alert.setString("Correction took: "+(System.currentTimeMillis() - startTime)+" milliseconds");
              display.setCurrent(alert,message);
              String msg=message.getString();
              try
              {
                  clientConn=(MessageConnection)Connector.open("sms://"+mno);
              }
              catch(Exception e)
              {
              }
              try
              {
                  TextMessage textmessage = (TextMessage)clientConn.newMessage(MessageConnection.TEXT_MESSAGE);
                  textmessage.setAddress("sms://"+mno);
                  textmessage.setPayloadText(msg);
                  clientConn.send(textmessage);
              }
              catch(Exception e)
              {
              }
          }
      }

By they way, I'm using MyPhone QT7 Duo as my testing device.