a letter from USCIS to say that "your 485 case is not ready for decison, as the required investigation into your background remains open. ..... If you don't get any final decision within 6 months after this letter, please call us again." I don't know if I need go to the local office by infopass again to confirm this or not, I guess I should say that my NC is not clear. Anybody have experinces with this thing? Thanks!