At first I was worried you were the kid... then I looked at your profile and saw your age... I knew you were the parent and guessed what the issue was... I am glad to have helped.
you're lying about your age. Go to your room!
If your tweets need scrambling, then you're dealing with the wrong people... Get a grip.
Why not take his phone away? I am 22, but I think teens are creeps and mostly up to no good. (I know first hand). Parents are stupid to give them text messaging.
It's amazing how easily those expensive phones accidentally fall into the water when you are not careful. It's a shame it ruins them where they cannot be used again.