In Reply to: teenagers posted by 1_mae on Monday, 11. June 2007 at 12:36 Bali Time:
My teens take their mobiles to Bali and use Bali sim cards. That way if they are off on their own I can contact them, or they can call me if they need anything (usually extra money!!).
Your 19 year old is an adult so really should be responsible for himself, and as with Andytoo, I would say do as you normally do for the 15 year old.