IMEI Unknown ICCID Unknown need to restore but how iPhone 3G

See if you can force the phone into recovery mode:
Leave the USB cable connected to your computer, but NOT your phone, itunes running, press & hold the home button while connecting the USB cable to your dock connector, continue holding the home button until you see “Connect to iTunes” on the screen. You may now release the home button. iTunes should now display that it has detected your phone in recovery mode, if not quit and reopen iTunes. If you still don’t see the recovery message repeat these steps again. iTunes will give you the option to restore from a backup or set up as new.
Post back if this does not work & Ill suggest one more step before suggesting you make an appointment at an Apple store.
MacBook Pro

Thank you for responding. I tried your suggestion but this didnt work. What would your next suggestion be?
Dell Studio 540 Windows 7

Youre welcome.
If you cant force the phone into recovery mode you can try DFU mode:
1. Close iTunes.
2. Connect your iPhone to your computer and then launch iTunes.
3. Turn your iPhone off (hold down the power button at the top of the iPhone).
4. Then, hold down the sleep/wake button and home button together for EXACTLY 10 SECONDS, then release the sleep/wake button.
5. Continue to hold down the Home button until a message appears in iTunes telling you an iPhone in recover mode has been detected. When you are in DFU mode your iPhone screen will be completely black. Remember that if you see the restore logo, iTunes logo, or any message on the iPhone screen, you are not in DFU mode but standard Recovery Mode.
6. Hit the OK message that should popup to restore your phone.
Bear in mind, you could very well have suffered a hardware failure. IMEI & ICCID unknown are indicative of a hardware failure. You will not be able to restore your phone if, in fact, it has suffered a hardware failure. Your next step would be to make an appointment at an Apple store.
MacBook Pro