Want to unlock your iPhone 3G so you can use it with another GSM carrier?  Need to make cheaper calls while you travel internationally?  USB Fever’s SIM Unlock card may be exactly what you are looking for.  There is no need to Jailbreak your iPhone 3G, void the warranty, downgrade any software/firmware, or breach your service provider’s contract using the SIM Unlock card.

This will not work with the 3G S model.

USB Fever SIIM Unlock Card – $33.99