AT&T has upgraded its 3G mobile broadband network in Texarkana with the deployment of additional wireless spectrum in the 850 MHz band. The telecommunications giant announced Wednesday that customers should experience a noticeable difference in their 3G connection, performance and enhanced in-building wireless coverage. The upgrade increases network capacity and is designed to support the growing demand for 3G mobile broadband service.

AT&T officials said technicians responsible for monitoring network performance for service quality have seen significant increases in total 3G dat...

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