Oppo ColorOS 6
For correct work of application: 1) Open “Settings ⟶ App Management ⟶ Prof Reminder”: 1.1) Turn ON “Allow Auto Startup”, 1.2) Select “Power Saver ⟶ Allow Background Running”, 1.3) Open “Manage Notifications” and turn ON “Allow Notifications”, 1.4) Open “Service Started” and turn ON “Display on Status Bar” and “Display on Lockscreen”. 2) Open…