Hey guys, I'll be spending the upcoming year in Japan (World Cup Champs!) for study abroad and I was wondering have any of ya'll used your US iphone 4 on softbank or whatever carrier and if so, how did you manage to do so? Was it difficult, is it worth the trouble of unlocking, etc? My alternative solution is either use the iphone as an iPod touch or attempt to sell the iphone 4, buy a refurbished ipod touch and use the rest of the money to offset my remaining year contract. Any opinions, suggestions, etc. Thanks!