CHICAGO--(BUSINESS WIRE)--Fitch Ratings does not anticipate taking an immediate rating action associated with AT&T's plans to acquire the wireless operations of NII Holdings, Inc. in Mexico (Nextel Mexico) for $1.875 billion, less the outstanding net debt of the business at closing. The transaction is expected to close in mid-2015 following the approvals by the U.S. Bankruptcy Court of the Southern District of New York and Mexico's telecom regulator. Further investment in Mexico has been ex