HP slate 6 voicetab dual sim, carkit

[Rolfpoland]

Good evening,

I have a question about my new HP slate 6 Voicetab. When i am using it with my carkit, i have too choose manually on the phone if i want to call with sim1 or sim2. Is there a setting that it standard calls with sim 1? So i can really call handsfree while driving

android version: 4.2.2

thanks for helping,

Roland