Sprint begins throttling users in congested areas

Despite what the "unlimited" plan might make you think, Sprint is exercising their right to throttle back on users they've deemed as using too much data. Heavy use contract customers on Sprint, as well as prepaid customers on Sprint-based MVNOs Boost Mobile and Virgin Mobile USA, have been hit with warnings that starting next month Sprint will be engaging in "prioritization management" in congested areas.

source: androidcentral