I want to change my ringtone on my motorola q phone to a song that I

[Gail]

downloaded how do i apply as ringtone? On my motorola q phone I don,t know how to change and apply other ring -tones for my contacts. Meaning I want to apply different songs for different contacts when they call other than the ring tones that come with the motorola q phone. I need to know how to do that.