1.5 or 2.1?
Cut and paste from the Tips thread
POSTED BY SMACKY
1. ##pst (##778)
2. "000000"
3. Modem
4. Slot cycle
5. When you're done exploring all the different options, be sure to hit "menu" and to save the changes. Don't back out as it won't save them.
6. You will be forced to restart and the changes should be made.
I bumped it from 2 to 1. Waiting to see the effect on battery life. If it isnt bad, I'll bump it to 0. Maybe its placebo, but I feel 3G is faster for me. Probably not, but i like to pretend it is.