Send SMS with out saving it in sent item in kitkat

Question

I am developing an application which needs to send SMS.

I am using SmsManager.SendTextMessage and SmsManager.sendMultipartTextMessage , Both of them are working well , the main problem is sent message will be saved on sent items(only in Kitkat , the older version don't save SMS) , but I don't need to save message.

My app is default messageing app. What should I do to prevent saving SMS in kitkat?

Here is my code:

try
{
    SmsManager smsManager = SmsManager.getDefault();
    String body ="Test";
    String to = "5556";
    ArrayList<String> parts =smsManager.divideMessage(body);

    smsManager.sendMultipartTextMessage(to,null, parts, null, null);
}
catch(Exception ex)
{
    Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show();
}