Tip 1 – Make sure you have turned off automatic download, such as Apps, Music and software updates
Tip 2 – Make sure you have turned off cloud drive auto-sync, such as iCould, Dropbox, Onedrive etc.
Tip 3 - Make sure you have turned off automatic backup for Instance Message Apps, such as WhatsApp
Tip 4 - ‘streaming’ services such as Netflix, Spotify and YouTube might use large amounts of data. This also applies to video and audio files on Facebook and other social media.