[OnePlus 3] Notifications of different Sim Cards (DualSim)

Hello together,

I haven't found a suitable forum for that. Maybe please swap forum.

First my configuration: I have a OnePlus 3 phone with two sim cards. One of the cards is my private one and one is my buissines card. Furthermore I have a Motorola Moto 360 (2nd) paired with the phone.

Tonight I'll have my first stand-by duty with this phone. So now (very soon ) I have some problems:

I want to have my buisines card at max volume for the night and turned the private one offline. (The only thing I need to have load are calls of one specific number)

Next problem is that my smart watch should ( but it doesn't work properly with the OP 3) turn of the notifications on my phone.

I already tested the first three apps on the playstore, non of than worked in any kind.

So short: I need to hear my phone load. And I would appreciate if I can turn anything else silent.

Thanks for your replays