Android Phone Device not showing

I am really struggling with android setup because some reasons it doesn’t show my device in UE4 because of which I can’t test my game on my mobile device which is LG G2 Mini.
I have setup android, Ndk, Ant, and Java variables and also when I run adb devices command in command prompt it shows my device as listed but however it doesn’t show my device in the device manager and I really don’t know why that is so PLEASE help and suggest any ways in which I could fix this.
I will really appreciate any help. Thanks.