Huawei Mate 20 Pro Dual Sim?

After hours of searching, I give it up, I now have 2 sim cards in my Huawei in it. Unfortunately, I can't get both sim cards in use! Where is the setting where I can set or activate it. I'm very grateful for any help provided, because otherwise I have no other solution.

Settings search Sim?

Ok, I know that so that you can access the two sim cards in the bar, did you take a closer look?

I've already done nothing

What do you mean exactly?

There's such a bar you pull with the finger just down, there you can, for example. The wlan on / off switch.

Aso, yes I've already looked there's unfortunately nothing.

With me tons of attitudes come to it. Apparently you want to troll or you leave a lot of fact away.

Operating instructions read?

Take one after the other in operation, if the phone has both registered, then you can choose one as 1. And the other than 2. Select.

You can also assign different functions to the cards - everything is there - who can read, has less stress!

I have no reason to troll, unfortunately I'm desperate. I can say that one card is a 1&1 card and the other one at Vodafone itself. I do not have the option of dual sim under wireless and networks. "

I'm already clear what must be there or what should be there, that's exactly my problem I do not think so or I will not see it.