Hot answers tagged ios-5
Which version of the iPad do you have? Not every version is compatible with every version of iOS; in particular, the first-generation iPad cannot be upgraded to iOS 6+. If that's what you've got, 5.1.1 is the latest version your device supports. See this table on EveryMac for details of which versions are compatible with which operating systems.
Only top voted, non community-wiki answers of a minimum length are eligible