This probably shouldn't be much of a surprise, because Sprint has been living and dying on its unlimited plans, and has been offering unlimited data on its pseudo-4G WiMAX network. So, changing that strategy would put the carrier at an even bigger disadvantage than being so far behind in building an LTE network.
the LG Viper would be going on preorder on April 12th, and that will also be one of the first LTE devices for the carrier. The lower-mid-range Android phone will be offered for just $99, and right in the opening of the announcement of the device, Sprint says that the phone will combine "the Sprint 4G LTE network and unlimited data plans".Earlier today, Sprint announced
Interesting that the confirmation of unlimited data plans on LTE was announced in such a muted way. We'd expect that Sprint would want to make a bigger deal of it, but maybe the carrier wants to actually have an LTE network before touting its features.