GRAND RAPIDS, MI -- AT&T announced it is now offering a fiber-optic network offering connections of up to one giga-bit per second in Grand Rapids and surrounding communities.

The upgrade, announced 11 months ago, was completed recently, making Grand Rapids one of 70 metro areas nationwide where its ultra-fast internet service is available, according to AT&T. Specific locations of the new network were not disclosed.

"We are proud to add Grand Rapids to our list of cities with our fastest internet speed tier available," said David Lewis, president, AT&T Michigan in a news release published Wednesday, March 14.

"AT&T's ultrafast internet speeds will open up more possibilities for our customers. They can enjoy doing the things they love online, with less frustration and in less time."

Between 2014 through 2016, AT&T said it has invested nearly $120 million in its wireless and wireline networks in the Grand Rapids area.

"High-speed internet has quickly become a preferred way to access information and communicate," said Grand Rapids Mayor Rosalynn Bliss.

"I am glad to see this investment from AT&T and am certain that the increased ability to tout Grand Rapid's connectivity to fiber internet further strengthens the reputation of our community."

The upgraded AT&T service is offered at $70 per month for customers who bundle with another AT&T service on a single bill, or only $80 per month stand-alone, according to the news release.