[w2n]

i have a 6800 i'm running software ver. 3.35.651.2

the way i tether is:
1. boot phone
2. launch Internet Sharing
3. select USB & Phone Aa Modem
4. hit connect

sometimes it enables, sometimes it doesn't (because my active sync with exchange OTA interferes) but i just keep trying until it does.

then i can usually browse until i receive a call

i only have unlimited internet & have never subscribed to any PAM services & one month i had around 2Gb worth of data usage. mostly from e-mail, web & VPN traffic.

granted the only thing i did differently from the rest of you is that when i hard reset my phone i kill the sprint ROM and then selectively install specific apps & configs from it.