Sprint will not charge for FaceTime over cellular
Those who have been keeping a close eye on the news lately know that AT&T might charge its subscribers for using FaceTime over Cellular. The carrier responded to these rumors saying that it was "too early" to talk about putting a price tag on the feature. But what about Verizon and Sprint – the other two carriers offering Apple gear? We aren't exactly sure what the former's plans are, but the latter has already spoken on the matter.
Verizon, on the other hand, has yet to come up with a comment on speculations that it might charge for FaceTime over 3G or 4G connection. Thankfully, the chances of that happening are not that high since tests have shown that iOS 6 on a Verizon iPad does not restrict FaceTime usage. Of course, the carrier might change its mind at a later time, should it decide that the popular video-calling app would put too big of a strain on its cellular network.
source: The Wall Street Journal
Things that are NOT allowed: