Is there a compatibility issue?
Probably yes. I presume you know that notebooks have limited upgrade possibilities and such upgrades are not support at all. In case that you are not happy with built in WLAN card solution is usage of external devices like USB WLAN cards.
All preinstalled software is also designed to work with original hardware components. It is not easy to help in this case.
I’m also wondering how do you can just buy some WLAN card and exchange it. I mean before doing this, it is important to check if such upgrade can be done or not.
Let’s see if someone else has some good suggestion what you can do to make it work.