The U.S. Citizenship and Immigration Services (USCIS) National Customer Service Center (NCSC) has expanded hours for its toll-free telephone assistance (1-800-375-5283) to include Saturday hours. This expanded service started on Saturday, 1/12/2013. They will now be taking calls Monday-Friday, 8 a.m. to 8 p.m. and Saturday, 9 a.m. to 5 p.m. For more information please read the USCIS Alert on the subject.