Fixing Android settings on OPPO devices
Settings vary across various Oppo devices and versions of the operating system.
A. Turn OFF Battery Optimization for Virtual Trading App
1. Goto Settings > Battery
2. Goto “Energy Saver”
3. Scroll to Virtual Trading App and tap on it
4. Turn OFF all the options on this screen
5. All options should now show turned OFF.
If the above options are not there on your device, try these:
Go to Settings > Battery and Storage > Battery Manager > Power consumption details > Optimize for excessive power consumption.
Uncheck Virtual Trading AppÂ
If you don’t have the above, try this:
Go to Settings > System Notifications > System Notifications > System Notifications
Scroll to Virtual Trading App  and Turn ON the button next to it.
If you don’t find the options above try this:
Go to Settings > Apps > Advanced > Ignore battery optimizations
Scroll to Virtual Trading App  and Turn ON
B. Add Virtual Trading App  to Startup Manager
Go to Settings > Security Center > Privacy Permissions > Startup manager
Scroll down to Start-up apps disallowed
Scroll down to Virtual Trading App and switch on the button next to it.
If you don’t find a Startup Manager in settings, search for an app called Phone Manager on your device.
Launch Phone Manager app > Privacy Permissions > Startup Manager > Virtual Trading AppÂ
Switch on the button next to Virtual Trading AppÂ
C. Enable notification Priority if you don’t get the sound
1. Goto Settings > App Management
2. Switch to “Installed” tab and then scroll to Virtual Trading App  and tap on it
3. Tap Manage Notifications
4. Enable Priority Notification
If you don’t find the options above, try this:
Go to Settings > Notification panel & status bar > Notification center
Find Virtual Trading App and then activate “Allow notifications” and also “Priority display“.