On Monday, January 28th Apple released a software update for iPhones, iPod Touches, and iPads. The software update contains numerous improvements and bug fixes. If you are currently using iOS 5 or iOS 6 you can install the software update by following the instruction found below.
Tap on Settings
Tap on General and then Software Update
Before you tap on Download & Install I would encourage you to plug your device into a power source. You wouldn't want to have your battery die in the middle of an update.
Tap on Agree
Once you have finished installing the Software Update you will be prompted to enter in your Apple ID password (password you use to install Apps) and then you will be able to use your device.