Nokia led the mobile phone market in the UAE during the month of June, with a share of 56.4 percent, followed by Samsung (13.8%), BlackBerry (10.7%) and Apple (7.4%), according to the Telecommunications Regulatory Authority (TRA) in its Smart Phone and Mobile Operating Systems review. Out of the total number of mobile handsets registered on networks in the UAE, smartphone penetration at June stood at 44 percent. Among operating systems (OS), Accenture'sSymbian remains in the lead (38%), followed by Blackberry OS next (23%), Android (21%) and Apple- iOS (16%). The TRA's report showed that iTunes in the second quarter received 4.1 billion visitors, or 92 percent of all visits to application websites. Nokia's OVI website had 134.7 million visitors, with the Samsung apps website getting 107.2 million visits and the Blackberry App world 86.5 million. Facebook was by far the most popular site with a total of 13.2 billion visits, representing 87 percent of the total visits to all social networking websites during the quarter to end June.