PLYMOUTH — Last month, Comcast boosted the speeds of its two top Xfinity high-speed Internet services, Blast and Extreme 50.

Wednesday, it boosted the speed of a lower-tier service as well, raising the top download speed of its Performance service from 15 megabits per second to 26 mbps on the download side, and from 2 mbps to 5 mbps on the upload side.

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Tim Collins, Comcast’s regional senior vice president, explained that as customer demands and technology evolve, “Comcast has continued to increase its broadband speeds to deliver the best, fastest and most reliable Internet experience possible for its customers.”

To activate the new speeds, customers can simply re-start their cable modems and routers.

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Comcast’s Xfinity Internet product availability and speed plans may vary by market where Comcast products and services are sold.

For more information about Comcast’s XFINITY Internet services, customers can call (800) COMCAST (266-2278) or visit www.comcastcorporation.com.

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As for pricing, Performance is $64.95 a month alone or $51.95 when bundled with Xfinity TV or voice service; Blast is $74,95 a month alone or $61.95 when bundled with Xfinity TV or voice service; and what is now Extreme 105 is $114.95 a month alone, or $99.95 when bundled with Xfinity TV or Voice Service.