DETROIT (WWJ) — AT&T Inc. last week announced wireless Internet capacity improvements in several areas across Michigan.

AT&T announced that there would be improved mobile Internet coverage in the Gaylord area and in Tuscola County in Michigan’s Thumb.

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The network enhancement adds new layers of frequency, also known as “carriers,” to seven cell sites throughout Gaylord to more efficiently manage available spectrum and increase mobile broadband capacity. The expansion helps manage ever-growing demand for mobile Internet services by allocating more network resources for AT&T’s mobile Internet network.

AT&T also announced the availability of its mobile Internet service in several central and northern Michigan counties, including Antrim, Otsego, Cheboygan, Emmet, Mackinac, Gratiot, Mason, Missaukee and Montcalm.

This upgrade is part of AT&T’s Project Velocity IP, a three-year investment plan announced last fall to expand and enhance its IP broadband networks. Through this investment, AT&T is supporting its customers’ growing desire for high-speed Internet access and new mobile, app and cloud-based services. As part of Project VIP, AT&T plans to add more than 10,000 macro cell sites nationwide by year-end 2015, as well as deploy more than 40,000 small cells and add more than 1,000 Distributed Antenna Systems to increase the density of its wireless network.

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Over the past five years, AT&T invested nearly $98 billion into its wireless and wireline networks across the country. Since 2008, AT&T has invested more capital into the U.S. economy than any other public company. In a July 2012 report, the Progressive Policy Institute ranked AT&T No. 1 on its list of U.S. “Investment Heroes.”

AT&T’s investment in Michigan from 2010 to 2012 totaled more than $1.5 billion.

AT&T operates the nation’s largest Wi-Fi network, including more than 32,000 AT&T Wi-Fi Hot Spots at popular restaurants, hotels, bookstores and retailers across the country, and provides access to more than 402,000 hotspots globally through roaming agreements. Most AT&T smartphone customers get access to our entire national Wi-Fi network at no additional cost, and Wi-Fi usage doesn’t count against customers’ monthly wireless data plans.

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For more information about AT&T’s coverage in Michigan or anywhere in the United States, consumers can visit the AT&T Coverage Viewer.