Apple has just released iOS 6.1.2 and fixes the problem with Exhange that appeared in version 6.1. Apart from the bug, it does not offer any other change, while we do not yet know if it is possible jailbreak, so if you want to keep your device "broken" do not rush to upgrade. But those who are not interested in it jailbreak, then you can do the upgrade via OTA, it is 107mb and it has the number build 10B146.
Quote from release Apple notes:
Stay tuned for any changes that Apple does not mention.
Dimitrios Georgoulas @ GreekAppleNews