As noted in previous threads my iPhone 3G had slowed to a sticky mess after upgrading to 4.0. I brought my phone to the Apple Store and they said it wasn't possible to restore my iPhone back to the older system software. My phone was rendered unusable to me because it took 4x as long to complete basic tasks due to the slowness of 4.0 running on it. I said to the store manager, "Other than sending me home with a useless phone, is there anything you can do? I'm not feeling warm and fuzzy about this". I received an Apple Gift card in the amount of $80.00 AND the option of a free replacement (previous system software) for my out of warranty iPhone 3G. I bought an iPhone 4 which I love. I used my giftcard. Apple made money and I went home warm and fuzzy. Do not accept what the new system software does to your 3G!