The HTC One X, flagship phone and jewel of their eye, is held up in U.S. Customs.
The patent wars are taking victims and the One X isn't impervious to the assault.
The offence in questions is the ability to launch the phone dialer when a phone # is clicked in a message / email or other communication. Yes, that's really the nuts and bolts of it.
to sum it up I've linked in the article from TechCrunch as it's summed up nicely:
To get a firmer grasp on why this is happening, we have to flash back to 2011. After HTC was originally slammed with allegations that they infringed ten of Apple’s patents with their “personal data and mobile communications devices.” International Trade Commission Judge Carl Charneski ruled in Apple’s favor on two of those claims (which just so happened to stem from the same patent, No. 5,946,647) in July. After a smattering of delays, the ITC handed down their limited exclusion order in December, which prohibited the importation of devices that violate the ’647 patent.