Step 1: Jailbreak
Step 2: Install BiteSMS
Bite has this feature, plus an infinite amount more. In a world where jailbreaking is free, legal, and does no harm, there is no reason not to jb these days. Just installing bite will not slow down the phone, or cause battery issues, or whatever fear inducing ideas anyone might have.
http://www.bitesms.com/main/more_features
Step 2: Install BiteSMS
Bite has this feature, plus an infinite amount more. In a world where jailbreaking is free, legal, and does no harm, there is no reason not to jb these days. Just installing bite will not slow down the phone, or cause battery issues, or whatever fear inducing ideas anyone might have.
http://www.bitesms.com/main/more_features