Zgpax s29-connection with bluetooth headset and android phone

Hello guys.I bought smartwatch zgpax s29 and though i am happy with it i have one problem.I want to be able to see a call from watch and then speak from my bluetooth headset.But i see that i cant connect with my android phone smartwatch and bt headphones in same time.It must be one or another.Is there any solution for this?
thank you