After you have Jailbreak your iPhone 3G with Firmware 2.2, you can download the add the Cydia yellowsn0w source here --> http://apt9.yellowsn0w.com
After installing the yellowsn0w 0.9.5..
- 3G and Data Roaming off
- Airplane Mode On
- Reset Network Settings
- Airplane Mode Off (...searching...)
- Voila! Got my Celcom signal..!!!
So far, its quite stable. In fact the 3G signal is much better than before (when I use turbosim solution on FW 2.1)
Earlier I have tried the method of using the "yellowsn0w -c" etc command but it doesn't work.
Thanks to Dev Team!!
I have been monitoring this progress since I bought my iPhone 3G in August 2008