I got scammed for trying to buy a nokia 2720 flip 4g and got this chinese copy instead. Whenever i try to change the ringtone i get this massege, "None". I tried changing it through the main file manager, but it does absolutely nothing no matter how hard i spam these buttons. (The phone features only 2 sim ports and even came with one of them broken. I don't know why it shows 4 options.)