SOUTHFIELD — AT&T Inc. Friday announced expansions and new cell towers in several locations around Michigan.

AT&T first announced the availability of its mobile Internet network in Houghton and Iron counties in the Upper Peninsula and Montcalm County in mid-Michigan, extending access for advanced mobile services, devices and applications to customers in these areas.

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AT&T also today announced the activation of a new mobile Internet cell site in Grand  Blanc near Burpee and Gales roads and another in South Lyon near West 8 Mile and Rushton Roads . The cell sites will enhance coverage for residents and businesses of those areas.

AT&T has the broadest international coverage of any U.S. wireless provider, providing access to voice service in more than 225 countries and data service in more than 205 countries. AT&T also offers voice and data roaming coverage on more than 140 major cruise ships, as well as mobile Internet services in more than 145 countries.

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AT&T also operates the nation’s largest Wi-Fi network, including more than 31,000 AT&T Wi-Fi Hot Spots at popular restaurants, hotels, bookstores and retailers across the country. 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.

AT&T also is a leading developer of Distributed Antenna Systems, which use multiple small antennas to maximize coverage and speed within stadiums, convention centers, office buildings, hotels and other areas where traditional coverage methods are challenging.

Over the past five years, AT&T invested more than $115 billion into operations and into acquiring spectrum and other assets that have enhanced our wireless and wired networks.

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Visitors to, get a peek into AT&T’s wireless network enhancements made since January 2011. Enhancements include new cell sites, Internet speed upgrades, capacity upgrades and network connection upgrades.