I hope my answer is still for you because I found your thread after 11 days.

I upgraded my WiFi card from Intel 8265 to Intel 9260.

Maybe you should try Intel AX200 for future proofing. I think some people hardly to suggest the Killer card.

I couldn't see that subject in the tech manual that dell provides for download.

Play is better that broken and that's what most people complain about.

I just re-installed one of these.

you have to make sure the upper part of the cover goes into the top of the screen first.

then click the bottom part on. I thought there was something under it keeping it from locking in. but it was just that the upper lip of it didn't get set up right. take it 100 off. and then try agian