Science and technology

Associated Press
FILE- In this Wednesday Sept. 19, 2007 file photo, an iPhone is displayed next to a T-Mobile sign, in Berlin. Unlimited wireless data is back. After sliding off the menu of cellphone plans, data plans with no caps are making a comeback at smaller wireless companies trying to compete with AT&T and Verizon. T-Mobile USA, the nation's fourth-largest cellphone company, said Wednesday, Aug. 22, 2012, that it will start selling an unlimited-data plan again on Sept. 5,  (AP Photo/Markus Schreiber, File)

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