A very small number of HTC One X owners are experiencing a bug that causes incoming messages to arrive without an accompanying notification. The bug, which occurs intermittently, has been acknowledged by HTC and a fix is apparently in the works. Those experiencing the issue see no notification in their status bar nor a badge on the Messaging shortcut on the homescreen indicating a new message has been received. Instead users have to open the Messaging app to check for new messages.
The problem appears to be affecting all versions of the One X, including AT&T’s recent release.
Android Phone, Message notification bug affecting small number of HTC One X users