Under the new speed increases, more than 75% of residential customers in the Northeast will have download speeds of 200 mega-bits-per-second (Mbps) or higher. Comcast customers paying for its “Extreme” internet plan will see download speeds increase from 400 to 600 Mbps. On the lower end, Comcast is boosting download speeds on its “Performance Starter” plan from 10 Mbps to 25 Mbps — the minimum speed recommended for streaming 4K video, according to the Federal Communications Commission.