Sprint’s Unlimited Data May Have Limits Afterall The word “unlimited” has a sweet ring to it. It conjures images of plentifulness, and of being able to take all you want without fear of repercussions. Sprint loves to advertise its unlimited data. In an age when tiered data plans are now the norm, the carrier has heavily marketed its status as the last unlimited holdover. But how unlimited are Sprint’s plans? As it turns out, even they have limits.