We expect to obtain the BTC's GSM license in 4 to 6 weeks, said Christian Mruck, managing director of Advent International. Yesterday the Privatisation Agency PA) sent a letter to the Telecommunications Regulation Commission requesting that a license be issued. Bulgaria's sale body and Viva Ventures signed the contract for the sale of 65% stake in BTC late on February 20, wrapping up the long-drawn-out sale of the telecom.