Hey guys. I'm a little confused if the phone is unlockable. Looking at the last 3 digits it looks like it was made in the 13 week of 2004 (doenst make sense) But looking at the other 3 digits it seems like the phone was made in 2010 week 13 so that means its good for unlocking and ultrasn0w. Can anyone confirm please. Also is apple still signing 4.1? Thanks. Apple warranty check shows that the phone is definitely more than a year old.