Hmmm 11streer seller trust worthy enough?
Edit, miri senheng not bringing in p20 pro this weekend.

I had just purchased a Huawei P20 Pro last week.
I use the magnetic holder to hold the phone. I put the metal on the case and not on the phone.
I found out that, if I was to put the magnetic holder somewhere near the rear camera area, then the touchscreen will stop working, while the fingerprint reader still function as normal.

As soon as I move the magnet away from this particular area at the back of the phone, the touchscreen back to normal functionality. But as soon as I move the magnet back to the area again, the touchscreen stops functioning again.

This makes me suspect that the back of the phone does not give sufficient magnetic shielding to the electronic components at that area and this area so happen has something to do with touchscreen functionality.

Curious other Huawei P20 Pro owner have encounter this problem or not;

Of course I can easily solve it by moving the magnetic holder a bit lower than the rear camera position. So it is not a big issue. But is a finding worth mentioning I think. Especially to those who like to use magnetic holder.

Here I include a short video demonstrating what I mean: