I ask some of my friends to reduce their mobile usage and test if the money spending will be less.

One of them spend 10+hours a day, and £1500 per week on mobile, like shopping website, and game top up, all costs from website are included.

one of them spend 9-10hours a day, and £300-400 per week on mobile.

Some of them spend 6-8hours a day. and spent from £120 to £3000 per week on mobile.

They will less 2hour mobile usage time from last Wednesday. and hope they will spend less until next Friday.