I used this stuff to get my speed to triple.
Download this program:
http://forum.xda-developers.com/atta...9&d=1236890770
Run the software that i provided (tcptune). Use the following settings for Cellular line 1, and Cellular line 2:
Rwin: 98300
Windows Scaling on
TTL 128
MTU Discovery on
Selective Acks on
Time Stamps off
Reboot.
Peep the speed blast.
Forgot to mention that I'm on Sprint. Not sure if this works on other carriers but it would not hurt to try.