iOS 7.0.2 beefs up Passcode Lock security, eliminating access to the Camera Roll and recent apps, preventing non-emergency calls from being made at an iPhone’s Lock screen, and restoring a Greek keyboard for passcode entry. It’s a 21 MB download via Settings > General > Software Update. follow link
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All You Need to Know about iOS 7.0.2, in 45 Words
It seems that this update also fixed the time and date stamp on messages. It has never been right until now.
I ran the update on my iPad 2 and it had no effect! It left my iPad running 7.0, but if I select Software Update in Settings, it tells me to download and install the update. I've done it twice now, to no effect.