KTF, South Korea’s second largest cellco in terms of subscribers, has reported that its net income in the three months ended 30 March 2007 was KRW77.07 billion (USD83.77 million), down 38.5% from a year earlier. Sales rose 12.9% year-on-year to KRW1.76 trillion, but operating profit plummeted 41.1% to KRW100.65 billion. KTF attributed the decline in quarterly earnings to a rise in marketing costs stemming from a recent 3.5G promotion; on 1 March KTF extended coverage of its high speed downlink packet access (HSDPA) network across the nation, allowing for faster data transfer and video telephony.