The WLAN card is held in place by adheisve.

Use a spudger or clean fingernail to pry up the WLAN card's notched edge until it pops up at a slight angle.

If you're having trouble, heat an iOpener and apply it to the notched edge for two minutes. Alternatively, you can use a hair dryer to heat the edge.

Pull the WLAN card straight out of its socket and remove it.

During reassembly, insert the WLAN card at a slight downward angle and push down to secure it with the leftover adhesive.