Reset of Dexcom G6 Transmitter

I have been unable to reset the Dexcom G6 Transmitter using the XDrip Plus App for the 8G and higher Transmitter serial numbers. Will the Spike App work for these newer Transmitter or has Dexcom found a way to shutdown reset period?

As far as I know, no.

Seller on Amzn says this…
All our refurbished transmitters are the 80 or 81 serial numbers which can be reset to zero day upon shipment.