I don't know how comprehesive this is, but clearly AT&T is not the only one (or US the only market affected): http://www.zdnet.com/article/optus-announces-2g-ne

I don't know how comprehesive this is, but clearly AT&T is not the only one (or US the only market affected): http://www.zdnet.com/article/optus-announces-2g-network-shutdown-from-2017/ http://www.zdnet.com/article/optus-announces-2g-network-shut...