From the Settings app, tap Network & internet.
Tap Mobile data.
From this screen, you can limit your data usage and edit alerts for when you're reaching your data usage limits for the current month.
Tap or slide the Limit mobile data usage switch to ON.
Tap OK.
Drag the limit bar up or down to your prefered data usage limit.
Tap the Billing cycle dropdown.
Tap Change cycle....
Select a new usage cycle reset date.
We recommend you match this date to the date your Billing Cycle starts to more accurately manage your data.
Tap Set.
You've completed the steps!
