How do I set a data limit on my Android device?

To set a data usage limit:
1. Open your phone's Settings app.
2. Tap Network & Internet.
3. Next to your carrier, tap Settings.
4. Tap Data warning & limit.
5. If it's not already on, turn on Set data limit. Read the on-screen message and tap Ok.
6. Tap Data limit.
7. Enter a number.
8. Tap Set.