[peanut]

For myself... In no order..

1. Calls
2, Whatsapp
3, (Live) Bus times
4. Controlling all home lights. TV, Fans, AV, Smart Plugs etc (Can do via iPad or Alexa).
5, Torch
6, Calculator
7, Asda App
8, Camera
9, iPod/music.
10, Browsing internet but very very rarely via the phone.

I would probably use about 200mb of data a month maximum. No social media etc either.