Just like everyone else I have been having horrible 3G speeds under Sprint... I rarely went over 200kbps download on the speedtests. Just recently my PRL was updated to 01115 and nothing has changed.
I remember reading about a 'throttle' folder in the data/system/ folder, so I deleted it and my speeds jumped up to 700-800 and I was surfing the web comfortably
I've tried everything, changing PRLs, editing the Home Agent and Proxy Values, resetting the phone but this is the only one that has worked. I hope it's not a fluke because this is what I expect from Sprint.
On a side note: The folder I delete reappears every once in a while :|
Android 2.2 [Sprint Lovers Rom]
SW - 3.70.651.1