According to the email, starting sometime this month, Sprint will be capping the amount of data available to phone and tablet owners using the device as a Mobile HotSpot to 5GB of data from the Sprint network. Users will be able to set up a system to receive notification from Sprint via email or text as you head toward the 5GB cap. The reminders can be received when a user reaches 75%, 90% or 100% of the monthly cap. Those who exceed the 5GB cap will be billed at an overage rate of 5 cents for each additional MB used until the next monthly cycle starts.
While this has no effect on unlimited data for smartphones and tablets, it is a crack on the wall that could spread. In other words, how much longer can Sprint be the lone holdout with unlimited data, especially when new customers aren't exactly flocking to the carrier.
source: techdirt via electronista