Videotron plans to introduce a revamped Ultimate Speed Internet 15 access plan for its customers on April 17. At the same time, upload speeds and data caps are being increased for most Ultimate Speed Internet plans. Videotron multi-product customers will be able to sign up for an unlimited data add-on to their Internet access plan for $10 per month. Business subscribers to any Videotron Internet access plan will receive the add-on at no extra charge.The Canadian MSO also says it has passed the half-million customer mark for its illico TV service less than one year after its launch.