The problem is known on Xiaomi devices. To resolve this, you must give the app permission to view notifications unique to this type of device.
From the device menu:
Settings -> Apps -> Manage Apps -> Num2
Click Notifications >> Yes
Tags: # Calling myself # Can’t call back # Can’t dial back # Return to caller # Calling itmself # The app calls itself
https://www.cellact.com/wp-content/uploads/2018/09/header123.png00Adam Madarhttps://www.cellact.com/wp-content/uploads/2018/09/header123.pngAdam Madar2020-03-03 10:47:082021-06-17 11:54:37When I try to dial back the numbers that called my Num2, the app dials my secondary number instead.