Apple has released iOS 7.0.2 to fix bugs that could allow the bypass of the lockscreen passcode ( read about it here and here ) and to reintroduce a Greek keyboard option for passcode entry. You can update your via OTA ( over-the-air ) or via iTunes. Good news for jailbreakers as well. According to MuscleNerd, iOS 7.0.2 will not affect in any way the upcoming jailbreak, and users can update their devices – even iPhone 5S and iPhone 5C users. It goes without saying that if you’re currently jailbroken, avoid 7.x.x. (Same if you’re on iOS5 and use redsn0w’s iOS5 re-restore feature).
Unusual level of detail in 7.0.2 security update notice http://t.co/ZWDFtzdT5J (for PR reasons?). It's not a JB vector so updating is fine.
— MuscleNerd (@MuscleNerd) September 26, 2013