Apple has released iOS 8.1.1. This release includes bug fixes, increased stability and performance improvements for iPad 2 and iPhone 4s. For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222″ which identifies generally security updates.
To install the update, you should connect to a Wi-Fi network then tap on Settings > General > Software Update.
iPad Notebook 