How long does it take for them to get back to you after an interview?

I had a job interview at a KFC 3 days ago, I'm wondering how long it'll take for them to get back to me. Also they won't be able to call me since I don't have a sim (I gave my interviewer a phone number that doesn't even work... yikes) I'm sure if calling me doesn't work they'll just email me, but I'm not so sure and I have a feeling they won't hire me.