KT, the exclusive carrier of the iPhone in South Korea, saw more than 120,000 pre-orders for the iPhone 4 on the first day of sales. According to a Korea Times report, KT’s ordering system was jammed early in the day, leaving customers unable to order for roughly two hours. “I really appreciate this enormous support from our customers, and I also apologize for the discomfort caused by the ordering system. We will do our best for flawless delivery…