Huawei P20 Pro different from Dual Sim and Single Sim?

How can one distinguish the single-sim variant from the dual-sim variant? At the model number etc? If so, what are these?

It has to be part of the product. So a difference is not recognizable at first glance.

https://www.inside-handy.de/...o-dual-sim

Single and dual-sim phones have an indication on your packaging as well as in the sales information which Sim-Art they support.