BELGRADE (Serbia), November 14 (SeeNews) – Telekom Austria Group said on Monday its Serbian wireless unit, Vip Mobile, turned to a positive EBITDA (earnings before interest, tax, depreciation and amortisation) of 21.6 million euro ($29.7 million) in the first nine months of 2011 from a negative EBITDA of 3.8 million euro a year earlier.