@vbobo .You enter that into the dialer as you would dialing a regular phone number. Usually a menu should pop up once you hit that last pound '#' key without having to press call
I just came to say that this helped me SOO MUCH! I just ported from Wind to Public Mobile (taking advantage of their CRAZY $40 deal) and was wondering why I was stuck on 3G.. it took me an hour or two of googling until I came here! I first changed my...