Dual sim not working properly

[Bianca Cojocaru]

Hey! I have two sims in my note9: sim1-vodafone Romania and sim2 -tre Ireland. The problem is that when i am in a call, the other sim is "shut down" and i am not notified about the call that might want to come through on the other sim. If i try to activate the dual sim always on - i get call fw failed on both sims and call waiting on. I have deactivated voicemail on both and still get the same issue. Pls help!