Thank you for your quick response.
My situation is that my Biometrics was done and I-485 was approved but in the notice , it tell me I should go to local ASC for Passport Stamp; while my son did not have Biometrics done, his I-485 notice tell him he can directly get GC which is different with the update of USCIS online status. I am really confused. Anyway I try to contact them through the phone you mensioned and see what will happen.
Thank you so much.