AT&T today announced a new feature for its data plans called Stream Saver that will effectively throttle mobile video streams starting sometime next year. Touted as a “free and convenient, data-saving feature,” AT&T will cap what it says are most video streams to 480p by default. To watch video in high definition, consumers will have to opt-out using the myAT&T app or on the company’s website. AT&T says there is no charge to use the feature.

It sounds innocuous right now, and in most cases having a data-saving tool you can toggle on and off at will is a good thing. (AT&T killed overage fees in August, so it no longer has a vested interest in letting customers exceed their…

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