Xiaomi
Data Usage Warning on Lock Screen auf Xiaomi
Xiaomi tracks mobile data consumption inside the Security app rather than the standard system settings, which is why the lock screen warning option is easy to miss. Once enabled, the phone displays a notice directly on the lock screen when your defined data limit is close to being reached, so you do not have to open an app to check.
This function relies on the built-in data monitor, so it only tracks usage the phone itself measures. It will not match carrier billing exactly if your plan resets on a different date or includes shared data across multiple lines.
To turn it on, go to Tap on Security ➔ Tap on Settings ➔ Tap on Data usage ➔ Tap on Data usage warning ➔ Enable or disable Show warnings on lock screen ➔ Set the Data usage warning. Enter the limit that matches your plan, then confirm.
If your carrier already sends usage alerts by text or app, this lock screen warning is optional and can be left disabled. It is most useful when you are on a capped plan without automatic carrier notifications, or when you share data with other devices on the same account.