hi first time posting, so please be nice and guide me if i`m off on the wrong foot

if i have a valid tvb-jade card, will it work in another decoder? (strong 4653X) as against there own brand-supplied decoder?

how do they "deactivate" a smart card?

if i put the smart card in my own decoder (assuming it will work) how do they know if it`s in there supplied decoder or my own decoder?

if i cancel my subscription, but leave the card out of a decoder, how do they cancel the card?

once agin sorry if i have asked they wrong type of question/s