I did this hardware modification and it worked for me. I ended up losing R33 after de-soldering it and trying too grab it with tweezers - it’s too tiny. I replaced it with 1.5K ohm 0603 size resistor which was much easier to work with. I also opted to shift the resistor to the side, so it’s only making contact to one pad, rather than stand it on end.
Hi all !
Thank you for the tips. I had to change my rapsberry from a Pi B with a Pi4, and like you the gen5 stick doesn’t work.
So I have opened it, and find a 1.5K resistor in a old alarm clock. So after looking your posts and photos (thanks), I had tried to do that. Note that I have unpluged the battery before pluging the resistor (and repluged the battery after).
Now it works, Pi4 can reconize it (for Domoticz for the moment). That’s very cool !
Thank you from France 
Your link seems to be dead, but I found it again on another spot👍
Happy I found this thread, there is lots of valuable information here.
Thanks for all the posts and photos. There are soldering “artists” around
but kudo for doing those solders with bare eyes if you did. I am lucky enough to have a microscope and that greatly help in those cases
I personally have an old stick and to my surprise “it worked(™)” right away with the RPi4.
However, after some further testing, it does not seem to be working very well.
If I unplug and replug the stick, it will not be recognized until I drain the battery (which is now old…) a little bit. So I guess I do need the mod but having an old-old device puts me on the edge of it working “sometimes”.
So I think I will do the mod and see how it goes.