The iPhone 4 has already managed the best first-day sales of any device on Verizon's network, the carrier said Friday. It took just two hours for the iPhone to become the most popular phone in an initial launch on Verizon, which sold out of pre-orders for existing users at 8:10PM Eastern on Thursday. The rush was more impressive still when considering that these orders were between 3AM and 5AM, wireless chief Dan Mead said.
