How to manage the data usage on my Samsung Galaxy S9

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You can limit the amount of data used on your Samsung Galaxy S9. The phone can also notify you when you're getting close to the monthly limit.
1. Swipe up or down to view Apps.
2. Touch Settings.
3. Touch Connections.
4. Touch Data usage.
5. Touch Billing cycle and data warning.
6. Touch Start billing cycle on.
7. Scroll to the desired date.
8. Touch SET.
9. Touch Data warning.
10. Enter the desired data usage warning.
11. Touch SET.
12. Touch the Set data limit slider to turn it on.
13. Touch Data limit.
14. Enter the desired data usage limit.
15. Touch SET.
16. The changes have been saved.