Expanding on this thread that I posted a few days ago, I just want to cover all my bases. I am looking to buy an unlocked Hero so I can use it in Costa Rica by buying a SIM card. I am looking on eBay and the only ones that I see that are unlocked are ones that have the chin. Is this my only option? I don't really care one way or the other, I just want to make sure that these are the only ones that come unlocked/have a SIM. Thank you in advance.