Korea has a very advanced mobile phone network system, which has much higher data transfer rates [144kbps] than Europe or North America.
Their mobile phone technology is also reported to be some 3-5 years ahead and the third generation of phones is in widespread usage. For this reason their technology is totally incompatible with other older technology used in Europe, North America and other parts of the world and therefore it is necessary to hire a mobile phone for use there.
