A Biddeford-based Internet service provider says many of its Maine customers will have faster connections after a two-month upgrade.

A news release from GWI said the upgrade would begin Friday and take about 60 days to take full effect everywhere its service is available.

The upgrades have been planned for about a year and many customers will see faster speeds before the two-month deadline, said Fletcher Kittredge, GWI’s chief executive officer.

“Talking to the engineers at GWI, we have a bunch of equipment with that capacity,” he said. “It’s already hitting customers right away.”

All of the announced changes come at no cost increase for customers.

Kittredge helped set in motion a 1,100-mile fiber network known as the Three Ring Binder, which is set for completion at the end of 2012.

Though GWI’s project is unrelated to that project, he said it serves the same purpose: fostering business. “We’re hoping this will help economic development everywhere in Maine.”

A bill signed into law by Gov. John Baldacci in 2010 used more than $25 million in federal money and millions in private capital to build the Three Ring Binder line, to provide telecommunication companies the infrastructure to deliver service to far-flung portions of rural Maine.

A study released June 20 by the U.S. Chamber of Commerce ranked Maine No. 1 in the nation for infrastructure, citing that project as the main reason.

Four pieces of the project have been completed, according to the Maine Fiber Co.’s website: stretches from Portland to Brunswick, Bangor to Orono, Orient to Hodgdon, and Ellsworth to the end of Mount Desert Island.