Process is very simple:
1. Disassembly device [ Ссылка ]
2. Cover 2 connection pads figured on image with any resistive tape.
These pads are powering speaker when tag is assembled.
Some other tips/dependencies:
1. I tested this with regular SmartTag device (not SmartTag+)
2. I didn't update firmware
So far I tested it for one day after publishing video
