Call the National Service Center
1 (800) 375-5283 Pick 1, Pick 1, Pick 1, Pick 3 The one that says if you did not get welcome letter and 30 days has passed. They will connect you to a rep. Have your Info ready and they will send in an inquiry. I-485 receipt number, date applied for, date approved. In about 1-2 weeks you will get a written responce.