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Not getting notification in One plus mobile phone
Step 1: Open the mobile settings
Step 2: Go to the "Battery" section
Step 3: Tap "Battery optimization,"
Step 4: Click on 3 dot on the upper right tab "Advanced optimization"
Step 5: You will see to options "Deep optimization" and "Sleep standby optimization"
Step 6: Disable "Sleep standby optimization"
Step 7: After all these changes you will be able to get daily outstanding and summary notification.