T-Mobile S7 Call forward

A

AC Question

I have a galaxy S7. I also have a gear S2.
Here is the issue i use Youmail as my voicemail.
This requires call forwarding. However if I turn on call forwarding to my S2 it causes the voice mail call forwarding to shut off.

Is there an app that I can put in both numbers to forward to so when my S2 is connected via Bluetooth my S7 forwards to voicemail, yet when I am not connected to the S2 via Bluetooth it will forward to the S2