Huawei P30 lite New Edition
My phone uses a large amount of mobile data
Solution 4 of 4: Notifications are turned on
When you turn on notifications, you will be notified about various events such as new email messages, messages from social networks and calendar appointments.
Press Settings.
Press Notifications.
Press the required app.
Press the indicator next to "Allow notifications" to turn the function on or off.
Press the Home key to return to the home screen.