Wow they're moving quick.
System for Mobile Communications, or GSM, and Enhanced Data rates for GSM Evolution, or EDGE, will be on market-by-market basis. Service on the networks will be fully discontinued by about Jan. 1, 2017.
http://m.us.wsj.com/articles/a/SB10000872396390443687504577567313211264588?mg=reno64-wsj