PEORIA — Internet speeds for many Comcast customers throughout the Peoria area will increase substantially over the next several weeks through a system overhaul that will affect hundreds of thousands of customers in Illinois, Indiana and Michigan.

The change in download speeds differs across tiers of Internet service, more than doubling for some customers. The cable and Internet provider will alert customers to the specific changes to their accounts through letters in the mail and some email notifications.

“Comcast already provides the nation’s fastest, most reliable internet and in-home Wi-Fi speeds,” said John Crowley, Comcast Greater Chicago Region Senior Vice President.  “Our goal is to keep pushing the envelope for our customers to deliver more value and provide a great online experience."

Comcast customers may need to reset their modems to access the higher speeds when they become available. Modems can be reset manually or through the Xfinity My Account app. Directions on how to reset modems will be included in notifications to customers.

Some modems provided by Comcast, however, will not be compatible with the upgraded system and must be replaced. The company will alert those customers and provide new compatible hardware, according to a Comcast representative.

The roll out of the upgraded service is expected to be complete by mid-December.