avoid ?utf-8?Q? in subject line

[eluser]padmapriya[/eluser]
Hi,

Am using codeigniter 2.1.

How to avoid ?utf-8?Q? in subject line. Here is example am facing (?UTF-8?Q?App Confirmed?=)
How can i avoid this in Subject line for mobile sms..
For Email am getting correct Subject.


1.I have tried using the Email.php

var $newline = "\r\n";
var $crlf = "\r\n";

2.Tried for string replace also..

But no luck.. Same error..
Please,let me know the Process to avoid this error.