Overwhelming demand for the iPhone 4 took down Korea Telecom (KT) servers during the launch of pre-ordering and resulted in 130,000 units sold in just 13 hours. The device will ship and hit shelves at 2,900 KT stores nationwide in September. Pre-ordering began at 6:00 AM local time, with the first 100k units sold by the end of lunch hour.
In contrast, the iPhone 3GS sold 60,000 units over five days in South Korea when it launched in December 2009. KT is the second largest wireless provider in the country, and although the company increased its web server capacity they did not expect demand to be so strong. Web ordering went down intermittently throughout the day, with traffic swamping the available bandwidth. AT&T and Apple had similar issues with pre-ordering in the US this June.