US-based cable operator Comcast is rolling out its wireless internet service in Portland, Oregon, as part of the company’s nationwide rollout of Comcast High-Speed 2go wireless data service. Portland will be the first with Atlanta, Chicago, Philadelphia and more expected to get the access before year-end 2009.

Comcast’s 4G service will be provided via the Clearwire network, in which the company made an investment last year. Its 3G service will be provided by Sprint’s nationwide 3G network.

Comcast is selling two different data cards and service plans, High-Speed 2go Metro service, which provides wireless service within 4G metro coverage area using 4G-only data card, and the High-Speed 2go Nationwide service, which delivers the metro 4G service plus coast-to-coast access on Sprint’s national 3G network. The nationwide device reportedly switches between available 4G and 3G networks automatically.

Comcast said that it will bundle the wired and wireless internet service for approximately $50 per month for one year. This service provides consumers 12Mbps home internet service and 4Mbps when customers are on the go. For additional $20 per month, users can get the same services plus nationwide 3G mobile network access.

Cathy Avgiris, senior vice president and general manager for wireless and voice services at Comcast, said: “Innovation through mobility is one of many advances Comcast is providing consumers in the area of entertainment, information and communications. Comcast High-Speed 2go now gives consumers the best of both worlds, the fastest fast at home and on the go.”