Unread SMS Fixer is a free program that will allow you to fix a "corrupt" SMS database on an iPhone, which always shows an unread message count of 1 (or possibly more).
This issue seems to happen quite frequently with the "missed call" SMS notifications sent by Vodafone Italia and other operators.
It seems present in all versions of the iPhone firmware released so far (2.2 is the latest, at the time of writing).
NOTE: Detailed instruction on how to install this tool on your iPhone are available HERE.
Requirements:
· iPhone
What's New in This Release: [ read full changelog ]
· Since version 2.1.0, the program is also able to fix any non-zero unread SMS count, including the cases where it is negative.