I passed my interview for citizenship 2 months ago.The person who interviewed me say that i will be able to take the Oath sometime in the beginning of March which is only a month from now.But I have not received any letter to go take the Oath from the USCIS yet. Any suggestion of what should i do? should i call USCIS customer service? and should i do lk some of the above comments call CS and get transfer to IO? Thanks everyone.