Most of the 2010–2012 MBPs have WiFi, Bluetooth or both flaking out. With one of mine, WiFi crapped out while BT died on the other. At first, rebooting gets you going again for awhile; eventually, that stops working. In addition, WiFi pokes along at 802.11n speeds while BT is 4.0.

This fixes all the above:
802.11ac + Bluetooth 4.2 for 2010–2012 Unibody MacBook Pros

He's taking pre-orders at the moment and will be back to shipping soon. The last batch sold out in a couple days.

It's no secret what he does, taking later 802.11ac/BT 4.2 Apple modules and adapting them to the 2011–2012. The trick is the custom board and micro-soldering involved. Is it worth $149? After buying and returning three system pulls @ $50 that were just as bad and dealing with that bracket, I spent the big bucks—then immediately ordered a second which came a few months later.

If you have an 802.11ac router, WiFi performance is up to 15x that of 802.11n. My son-in-law was a test engineer for Apple on that project. Under the right conditions, 802.11ac is faster than Gigabyte Ethernet. It was late 2013 before the Apple line was updated all around (and has been standard since).

As for BT 4.2:

Quote:
The latest iteration of Bluetooth is 4.2 technology. According to CSR, point two upgrade is said to dramatically increase speed 2.6x faster which means super speedy downloads that compared to older Bluetooth versions.


Also, no bracket to deal with on the 15". Once you remove the old one, this lays in the tray. With the 13", he gives you a adapter that takes the place of the bracket you no longer need.

In both cases, took me under 10 minutes to install. If you have the back off to replace the battery already, takes even less time.

Here's the 52 page MacRumors thread on these. As you can see, most of the early concerns (Catalina and Big Sur compatibility etc) are not issues at all as I can confirm. They just work as they should.

802.11ac and BT 4.2 are here for unibody MBPs!

BIAB 2023 Audiophile, 24/60 Core M2 Mac Studio Ultra/8TB/192GB Sonoma, M1 MBAir, 2012 MBP
Digital Performer 11, LogicPro
Finale27.4, Dorico5, Encore5, SmartScorePro64, Notion6, Overture5