[From Karl Smith who is serving in the US Army] The TUAW is reporting that iPhone OS 3.1.2 is out and what does it bring or fix? "update fixes the widely reported issue where the iPhone would not wake from sleep, and also fixes an issue involving video playback and cellular service. This update is available for the original iPhone, iPhone 3G and iPhone 3GS, and the iPod touch." TUAW after the jump.