Still one of my most unnecessary projects. My apartment complex wouldn't let people have more than 1 garage fob per resident. So, I reverse engineered mine, bought some cheap fobs on Amazon, then wrote custom firmware for them that imitates my apartment fob.
@malwaretech sounds like you should return both the fob they gave you and a couple of cloned ones when you move out as a power move! Or better yet only cloned ones that differ from the apartment's official fob