My dad has to go to Antwerp, Belgium and needs a cellphone. He's never owned a cellphone before and he's asking me what he will need....but I've never traveled abroad. A co-worker told me I'll need to get him a gsm phone. He's only going to be there a couple weeks, so I'm hoping there's a pre-paid type. Does anyone know where to get a pre-paid gsm phone locally, or if they even exist?