[Starkel]

How do they check them? By opening?
Or only by scanning?

Physically opening the box and Inspecting Its contents.

And I already have the dummy, but it's not the same weight. That's why I ask. What could be put to fill?

Are you planning to SE Amazon?

They open a sealed box. Wow...

No, not amazon, I know that's dead, retailers that look like Wallmart in the EU. Like Leclerc, auchan....
They sell everything, so not too specialized on phones.