Apple has just released iOS 6.1.2. The update changelog notes:
Fixes an Exchange calendar bug that could result in increased network activity and battery life.
The iOS 6.1.2 update can be downloading using your WiFi connection. Follow these steps to initiate the update:
- Navigate to Settings > General > Software Update
- Tap on Download and Install
- Your iPhone will download the update, verify it and then restart.
The update is 12.6MB in total. Updating over a fast WiFi connection should take no longer than 3-4 minutes. If you are jailbroken, it’s recommended you avoid any updates until cleared by the Evasi0n development team.