For any one using and running i897 modem for the love of audience chip support on their device and also need band selection to lock 850 band, this thread is for you!!!
I first started using i9000 modem kernal combos just for the band selection ability.
After AdamHolden85 Allowed me to continue development on his KB1 Fusion rom i started a mission to unlock the "Rat". I gathered much information from users that suffered from "Rat". (weird that some users with i897 modems installed don't have this restriction, but most do)
Some may ask "What is "Rat"?"
dial *#2263# on your captivate while running a i897 modem and you get:
but what you are after is:
So lets get to it shall we!
This is really more of a security loop hole!!
1=Remove the simcard from your phone with out removing battery!
(use your nail to lift the edge of the card over the battery lip)
2=dial *#2263# and you will first get "RAT", wait for this pop up!
3=hit "OK" and dial *#2263#, and now you are in!!
4=select the bands you wish to use
5=Menu hard key to get popup here and select end!
6=place device into airplane mode!!
7=reinsert your sim with out removing battery!!
8=Turn off airplane mode and watch cell bars grow and data to connect in your status bar.
9=Dail in *#0011# and check for your self!!
May work on other band selection RAT modems, I only can confirm JH7,JH6,JI6,KB1,and KF1!