It’s been only a day since Verizon resurrected its unlimited data plan, and the company’s competitors are already doing their best to try and counter. T-Mobile has made the first move, with CEO John Legere moments ago announcing two improvements to the carrier’s T-Mobile One unlimited plan that both take effect this coming Friday. Beginning February 17th, the plan will include HD video, an upgrade to the 480p/DVD-quality “optimizations” that are currently in place.

Until now, customers have needed to spend extra money to stream HD video using cellular data. They could either subscribe to the regular T-Mobile One plan and spend $3 on any day they wanted to watch high definition video, or pay an extra $15 monthly for T-Mobile One Plus,…

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