Resetting new dexcom transmitters

I came across a post on another platform.
People in Australia have somehow found a way to get around the dexcom limitation of the transmitters that are new.
I really know nothing about it. But people here talk about it a lot.
My insurance gives me a new one every 3 months so I don’t really need this.
Interesting read in any case

From article:

"Then came the “Firefly”. The serial numbers jumped up to 8Hxxxx or so, and the shape of the top of the units changed subtly. Internally the hardware underwent a major overhaul. "

I think relatively few people got “Firefly” transmitters in past, and likely have been discarded. But if older/dead transmitters were saved, check them to see if Firefly per description.