Hey guys, My wife will be traveling to Korea later this week (from The US) and I had some questions about data and accessories. She will be taking a 4s and an iPad2. For data, is it best just to buy a prepaid SIM and/or use wifi when she gets there (vs her AT&T data)? For chargers, how does that work? She will no doubt need an adapter. Does anyone know how this works for South Korea?