Get to your ringtones (Settings - Sounds - Ring Tone). When you are there, scroll over to the one that you are wanting. If yours is already showing, go to the left and then back over to yours, so that it starts playing. While it's playing use the up/down arrows on the outer left side of the device and click up. It will say "earpiece volume" on the screen, but it's lying (lol). You should hear the ringtone get louder!
Hope this helps ya!
Is there any to increase the ringer volume on the Blackjack? I can't figure it out. If the phone is in my purse, I can't hear it. Thanks for any help.