How to Unlock iPhone 3G without wifi on IOS 4.2.1

Hi Guys, here are the steps that I want to share regarding on how to unlock your iPhone 3G without wifi.

1. Update/Restore your iPhone 3G to IOS 4.2.1
2. Jailbreak your iPhone3G (detail steps are here)
3. Install PC Suite into your PC (download PC Suite click here)
4. Download the needed file from here (ultrasnow1.2, mobilesubstrate, and afc2add), extract it to your local folder in your computer.
5. After you succesfully jailbroken your iPhone then connect your iPhone into PC and open PC Suite.
6. Follow the instruction from PC Suite, usually it will need to install Panda Daemon in your iPhone just click yes and wait for the installation to be finished.
7. After finished, restart your iPhone
8. And go back to PC Suite and select System Tab - choose Files (2x click it)
9. Go to folder var\root\Media
10. Create new folder: Cydia (case sensitive) and set permission to 777
11. Go to Cydia Folder you've just created and create New folder again named: AutoInstall (case sensitive) and set permission to 777
12. inside AutoInstall copy the 3 files that you've extracted from step 4. In order to copy to PC suite, just select "upload file" from the paper+ icon on the up left corner.
13. Set all the permission to 777
14. wait until finish uploading.
15. after finish exit from PC Suite and then restart your iPhone twice! yes....twice!
16. and wait until your iphone searching your desired network provider. (If showing no service just go to setting - carrier - and select manually your desired provider).
17. Voila!! that's it your iPhone its now UNLOCKED!! :-)

G'lak!, have a try!!