 According to Nokia, the 8800's "sophisticated slide mechanism uses premium ball bearings crafted by the makers of bearings used in high performance cars".The Nokia 8800 was first introduced on 7 April 2005 and was commercially available in the United Kingdom in October 2005 on the O2 mobile phone network.The Nokia 8801 was introduced in North America and uses the frequencies predominant in North America of 850 MHz and 1900 MHz.