Comcast's Xfinity Mobile has changed the terms of its Unlimited Plan to limit video resolution to 480p (non-HD), and throttle personal hotspot speeds to "3G speeds" (600 Kbps). The company plans to offer an option for higher video resolution for an extra fee, but not until "later this year". Video resolution limits are not uncommon with unlimited data plans. T-Mobile pioneered the practice. Comcast claims the changes are necessary in order to maintain the current plan prices. Xfinity Mobile operates as an MVNO using the Verizon network.


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