Customers can pre-order their iPhone 4 from either AT&T or Apple’s website, however, if you want to order white iPhone 4, you will have to wait a little longer. AppleInsider reports that the Apple in a press release said that the white iPhone 4 will not be available until the second half of July citing manufacturing challenges as the reason for the delay. They also mentioned on Apple’s website that preorders for white iPhone model are currently unavailable. Apple also says that popular black models are good to go and white models will be ready in the stores tomorrow. So, if you want to order white iPhone 4, wait until late July.