Samsung Galaxy A55
My phone uses a large amount of mobile data
Solution 2 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.
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Notifications.
Press App notifications.
Press the drop down list.
Press the required setting.
Press the indicators next to the required apps to turn the function on or off.
Press the Home key to return to the home screen.