snes roms?

wait i just download the same roms as if i were going to play them on my laptop?
what about i have to use the ones you pay for? are they any free that work?
Yeah just transfer the ROMS, they're the same thing just insert them into your emulator.
how do i get the roms into my i download it through my phone or onto my laptop 1st and then somehow transfer it to my phone...if that is so how do i do that?