Apple started seeding iOS 7 about a week ago but as soon as the OS went public, a vulnerability was discovered which, when exploited, was able to give unauthorized access to iOS 7 running devices. Apple already acknowledged that bug and now it has started seeding iOS 7.0.2 to address the security flaw.
The bug in iOS 7 allowed illegal access to the device and thus letting the intruder get access to messages, email, photos and social network profiles of the owner of the device. Apart from fixing this bug, the Greek keyboard has also been added to the OS. You can download the IPSW file for your respective device(s) by clicking here.