This probably isn't the best sub-forum to post a question of that nature. It will more than likely mostly depend on your phone and/or the carrier you are using it with, so providing that information would be helpful.
I actually called Verizon recently with this question. I was told that it is NOT the carrier but the phone. I have an LG8300 that does not possess that feature. He recommended one of the Samsungs. Call your carrier and ask which phone has that feature that is compatible with your network.