SAGINAW – AT&T Inc. says it has activated an upgrade to bring faster speeds to more than 340 cell sites in central and northern Michigan. People using the network in these locations should realize better service when they’re watching videos, posting to social media or texting family and friends.

The upgraded cell sites in Michigan are located in various communities including Big Rapids, Mt. Pleasant, Muskegon, Cadillac, Frankfort, Ludington and the Tri-Cities area.

People utilizing these towers will be using an expanded band of radio frequencies. That means greater speeds.

AT&T invested more than $1.7 billion in its Michigan networks from 2012 through 2014. This drives a wide range of upgrades to reliability, coverage, speed and performance for residents and business customers.

Additional information about AT&T products and services is available at http://about.att.com.