面对使用纯PHP发送短信的一些问题

I am trying to send SMS through PHP by using this code

<?php
date_default_timezone_set('America/Vancouver');
$errorMSG = "";
$headers .= "";
$headers .= "From: info@xxxxxxxxx.ca";
$EmailTo = "2222222222@msg.telus.com";
$Subj = "
 Thanks For Schduling Appointment With Us 
";
$message = " Your Secure Code is : 54689";

$success = mail($EmailTo, $Subj, $message, $headers);

which is working OK for me but I am having some isses here:

1- Message is added a string Subj: which is not in the code! how can I get rid of it?

2- the Sender Number looks 99999999 how can I force to display my actual number instead of that fake number?

3- I tried to add new/break line by adding to the string but as you can see from the first tried SMS at took it as string as well. can you please let me know how to fix it?