(ANSA-AFP) - PARIS, 21 SET - The parent company of French mobile operator Free has launched a public offer to buy out Play, the largest operator in Poland, as it moves to boost itself on the European stage. Iliad said the offer, which values Play at 3.5 billion euros ($4.2 billion), has already been accepted by two of the firm's reference shareholders that have a 40 percent controlling stake. "Like iliad, Play has seen exceptional growth over the past 15 years," said the group which shook up the French fixed and mobile markets with competitively priced and subscription-free offers. "It is the most recent entrant in the Polish mobile telephony market, having entered in 2007, and today it has 15 million subscribers and a 29 percent market share, making it the leading mobile telephony operator in Poland," it added. Iliad said the addition of Play would take it to 41 million subscribers in France, Poland and Italy, and make it the sixth largest telecommunications group. (ANSA-AFP).