Oppo mobile phone does not display information after locking the screen.

There is no notice about the use of data traffic and wireless LAN by three-party applications, so you can try the following methods to troubleshoot:

1. If notification do not disturb is turned on, the notification bar will prompt that notification do not disturb is turned on, just cancel notification do not disturb.

2. Turn off the notification switch set to unimportant/turn off the switch moved to the bottom of the notification.

A coloros11and higher version path: "long press the application icon"; Application Information/Application Details Notification Management System Default Channel/System Silent Channel; Set as unimportant notification "

B.coloros version path: "long press the application icon"; Application Information Notification Management Close and move to the bottom of the notification "

3. Long press the tripartite application icon to enter "Application Information"; Power management ",turn on" Allow applications to start by themselves "and turn on" Allow wake-up in the foreground ".

4. Long press the tripartite application icon to enter "Application Information"; Traffic usage ",cancel" Disable mobile data "and" Disable WLAN "and turn on" Data can be used in the background ".

5. Go to Settings SIM Card and Traffic Management (or Mobile Network): Traffic Management and turn off Traffic Saving.

This answer applies to all OPPO models.