I have an LG 900 g phone and having trouble figuring out how to download a ringtone to my phone,it says tap a thumbprint or something like that it just plays the song doesn't do anything else. My phone only has a plug for an outlet to charge phone no USB cable. When I used to have AT&T I just payed and it downloaded to my phone very simple except for having to keep dishing out money for a ringtone and then loosing them if you got a new phone. Please help