The same thing happened to me. I bought and activated the SIM yesterday but 1 day later there's still no email sent to my inbox or any service available. Wonder what they mean by 4 hours. Is there any means to reach Boost directly to ask about this? I really need service asap. Disappointed.
Same thing has happened for me, activated it online on Monday and still nothing. Tried calling their customer service and it said that the call couldn't be connected.