Everyone talking about VoLTE. Can somebody give feedback on 2g/3g/gsm? If, someone says gsm quality depends entirely on carrier only, it seems wrong to me . I just tried my sim several times and several calls on a colleague's MI lower end phone. Its gsm call quality is far superior to my Samsung note 3. I am on Idea network in Pune, India. I will buy Rog phone 2, 512gb. Idea may have Volte here for asus but I am not sure. And in some places idea may not have Volte. Can anyone give feedback on experience on gsm call quality of ROG phone2?