What's not clear in that thread is how the target unibody MBP's original female IPEX1 antenna receptators would connect to the smaller IPEX4 male heads on the newer Broadcom wifi+bt card.
"Following Qualcomm, Broadcom's Wi-Fi chips will also be replaced by Apple's in-house chips at a faster pace," Kuo posted on ...
If the issue persists, restart your system to apply the changes. This command is for Broadcom adapters, but other Wi-Fi cards ...