(Telecompaper) Samsung Electronics' new flagship smartphone, the Galaxy S5, is selling faster than its predecessor the S4, according to Yoon Han-kil, senior vice president of Samsung's product strategy team. Samsung launched the phone in double the number of countries on 11 April, while also offering significant discounts and free gifts with the device. In an interview with Reuters, Yoon said the S5 "is selling faster than the S4 so far, though it's difficult to share specific numbers as we're still at early stages". He added that the company expects S5 sales to be "much better than the S4". Though Samsung did not offer any sales target for the S5, the company sold more than 10 million S4s in the first month of the phone's launch. Yoon said the S5 should do significantly better than this. Yoon also said Samsung was working to introduce at least two smartphones running on its own Tizen operating system. The first, a high-end model, should be available by the end of Q2, while the second would mainly target the mid-market. Yoon said that although Android "still needs to be our main business", Tizen or Windows would be used for markets that Android could not address.