Default Mod please delete posted in wrong section, have re posted in help

Hi, I've made a gold are for a second desire s I have that I got for free and trying to revive and the card works as it should although I think the desire is beyond help, my question is about keeping the card.

Once made and used can it be re used over and over in different devices with different files for those specific phones or do you have to remake the card each time its used for a different phone?

My other question is does formatting it mean you have to re make the gold card or does the hex edit remain?

Thanks in advance,