well... i wouldn't advocate a cold turkey with sneha because it would only lead to revolt, rebellion and hostiliity with a teenager! I would start "rhythmic" time zones where it was permissible (for example turn on mobile only after school and use it only after every two hours for half hour! so there are short bursts to keep addiction in control through the day! btw my daughter has no access to her mobile, facebook or internet (unless for school research) one entire month prior to her exams! feels cruel... but it helps her focus without the constant beeping distraction...