Windows Phone 8 has finally reached RTM (Released to Manufacturing) status. This means that Microsoft has completed development and the software is ready for integration into various Windows Phone 8 devices.This is welcome news considering the reports which suggested that Microsoft was running late on completing their mobile operating system.The Windows Phone development team at Microsoft have been happy to sign off on the RTM, and they have tweeted some photos of the team signing off the RTM Signature Edition of Windows Phone 8
source – WMPowerUser