Please choose the right version of Whited00r firmware to install on your device. Making the wrong decision will not break your device, but you might have to restore the device again because something could be dysfunctional (for example Mobile Network or Push Notifications).
There are two different versions of the Whited00r firmware for iPhone 3G: Normal and Unlocker.
Please download Whited00r Normal version if you can legitimately activate you device via iTunes AND you don’t need carrier unlock. You do not need the unlocked version if your device is factory unlocked (as Italian iPhone 3G) or you are using the iPhone with the official carrier that sold you the device. All other users should choose Whited00r Unlocked firmwares because they need carrier unlock. Whited00r firmwares preserve your iPhone 3G baseband. Whited00r Unlocked firmware works perfectly on iPad Baseband 6.15.00, but we suggest to downgrade it following this guide: Baseband Unlock
Whited00r Unlocker firmware needs a Push-Notifications patch after the installation. PushFixer.com
Required tools for installation are included inside the zipped archive you are going to download. Don't forget to unzip the compressed folder.