Have a ZTE Skate running ColdFusionX 2 (Android 4.x). I am trying to set the SMS tone to an MP3 file in the Ringtones folder on the memory card. I open the Messages app, then Settings. Under Notifications, I choose "Choose ringtone" and I get options such as: "Default ringtone, Silent, Doink, Naughty, Pong" etc. - but no way to set a custom tone. Any ideas?