French media group Vivendi has revealed it wants to increase its stake in Telecom Italia.<br /><br /> It’s on track to become the largest shareholder in Italy’s biggest phone firm once it receives an 8.3 percent payout for selling Brazilian broadband group GVT to Spanish carrier Telefonica.<br /><br /> Vivendi reportedly wants to raise its stake to 10-15 percent, as Telefonica and three Italian financial institutions dissolve the investment vehicle through which they controlled Telecom Italia since 2007.<br /><br /> France’s Orange and Germany’s Deutsche Telekom have also expressed interest in buying Telecom Italia whose shares rose sharply on Wednesday.