The US cellular operator MetroPCS has reported a record 520,000 net subscriber additions in the fourth quarter of 2008, a 74% year-on-year increase in net adds. Gross additions were up 55% at 1.3 million. MetroPCS, which offers flat-rate unlimited calling plans without a contract, has been boosted by a roaming deal with rival operator Leap Wireless which was signed last September and the introduction of a new nationwide service tariff. It claimed almost 5.37 million customers by the end of December 2008, up from 3.96 million a year before. ‘We are excited about our future growth potential given current landline replacement trends, the resiliency of our business model, as well as the incremental growth we expect from our planned service launches including Boston and New York in early 2009,’ said chairman, president and CEO Roger D. Linquist.