Hi, I recently changed my carrier and sim card and noticed that, even since, I get no messaging notification. I am using the default 'Mi Messaging' app. When I go into settings, App notifications, messaging, the 'show notifications' button at the top of the page is greyed and cannot be toggled out. I have checked and my apps are NOT locked through the App lock setting menu. I do not use any other messaging app, just the stack Mi Messaging system app. Any help would be greatly welcome. Thanks.