(Telecompaper) Vodacom Group posted a 7.5 percent increase in its revenue to ZAR 80.01 billion for the year ended 31 March from ZAR 74.50 billion in the previous year, supported by strong demand for devices, particularly smartphones. Preliminary results show that service revenue increased 7.4 percent to ZAR 66.76 billion, underpinned by improved trends in voice revenue and data revenue growth of 28.5 percent. Data revenue contributed 31.9 percent of group service revenue, up from 26.7 percent a year ago.