Automatically change from U8 to phone when on a call.

[VisceralSpecter]

Hello everyone! I have a U8 smartwatch and I don't want to change from bluetooth to phone every single time I answer or make a call. Is there any way to make it do it on it's own? Like with tasker? I have a Oneplus One and have root access if there is another app/setting that would help and requires root.

IMPORTANT: If I change the setting on the bluetooth settings page to not include phone audio. The watch disconnects.