AT&T is doubling the download capacity of its HSPA 3G network just before a new iPhone device is expected to launch. The new speeds take AT&T’s capacity from 3.6 Mbps to 7.2 Mbps for 3G devices.

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T-Mobile has been slow to counter its mobile rivals in the 3G space, falling behind AT&T, Verizon Wireless and Sprint when it comes to coverage area and speeds; its 3G service is now available to more ...

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