When phone with dual sims is connected to cars head unit in Android auto mode making the call through head unit is not possible as Android auto does not support dual sim but on my previous phone when i dail a number on headunit a popup appears on phone to select which sim to use to make the call but nothing like this happens with Asus 6z even in pie but in pie i can make calls by clicking on recent dialed contacts through phone itself but after Android 10 clicking on recent dialled number does not show any popup to select sim even saved contacts does not dial. I have to dial number manually on phone to make call which is risky while driving.