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7 of 24 from Inside Sprint's cell phone testing labs (photos)
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A heavy metal door with a prominent handle sealed the chamber. In this facility, Sprint tests network compatibly for CDMA, EV-DO, and WiMax devices. The iDEN devices are tested at an RF chamber in Reston, Va.
July 21, 2011 4:41 PM PDT
Photo by: Kent German/CNET
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