OMG, this was not just posted! People will read this and think they can just swap their AirPort card.
Before you order that card:
This was not well written, you can't just get a BT card and swap it out like RAM. The BT card is buried inside things, to where you need to remove the display to get to it. If you're not a technician, you're not likely going to have the patience to do this.
Changing out the card in my mid-2010 MBP sounds great.

Finding the card is one thing. Looking at detailed instructions on ifixit, how to get to the AirPort (BT/wifi) card? PLUS, the replacement card is not an exact fit, needs custom install. Sounds too involved with tiny screws and stuff. Most people will not be happy about this.
https://www.ifixit.com/Guide/MacBook+Pro+13-Inch+Unibody+Mid+2010+AirPort+Card+Replacement/6024
I can't find the thread right now, but,
anything older than 2011, the new AirPort card has different connections and will be a custom fit. Because of this, I'm just not going to do it. This has been the most reliable Mac I've owned, not going to mess with it.
So, don't just buy the card thinking this will be easy.
Buyer beware.