I really don't know. SMS gets received on some mobiles successfully. On some mobiles, it is received but doesn't get displayed and says "Message can not be displayed". On some mobiles it is not received at all.
Following is the code i am using to send the message.
public void send(
String no, String mess){
try{
String num=no;
String msg=mess;
String address = "sms://"+num+":50000";
MessageConnection smsconn = null;
smsconn = (MessageConnection) Connector.open(address);
TextMessage txtmessage = (TextMessage) smsconn.newMessage(MessageConnection.TEXT_MESSAGE);
txtmessage.setAddress(address);
txtmessage.setPayloadText(msg);
smsconn.send(txtmessage);
smsconn.close();
}catch(Exception ex){}
}