The assistance is there, but it doesn't enable you to truck up huge hills super fast -- it'll give you enough of a boost so that you're not completely annihilated, but doesn't do all the work by a longshot.

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This makes sense for such large files, as a means to cut the downlink time and save your capped data plan from getting completely annihilated in one fell swoop, but don't be expecting to get the best possible quality from it.

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