I have tested download speeds at a number of locations using different towers now. In a dead spot near my home I averaged only 87kbps. Now it averages 202kbps. My office is an all metal building where I can only get 4 bars. Without the tweak it averaged 1006kbps. Now 3G averages 1669kbps.
With the Epic 4G and EVO 4G we found that this worked for about 90+%. Try it and see if it works for you. If not, just go back to your original settings that I listed in the opening post.
This didn't help my speeds unfortunately, although I really didn't have much to complain about. I averaged 650kbps down before, and 648kbps down after here at my office. Ah well, I'll probably keep the settings in case I need data when I'm out and about in a weak area. Maybe it will help in those circumstances.
Unfortunately it didn't work for me. I cant really complain. I was getting between 1.5 and 2 down. After I changed it it dropped down to 1 down. I put it back to default and it went back up to closer to 2. Maybe it only works if you are having slow connection speeds to begin with? I am glad it seems to be working for other people though.