Warning: Right now, jailbreakers and unlockers must stay away from iOS 6 update.
You can download iOS 6 on your iDevice from iTunes or via OTA option navigating through “Settings” > “General” > “Software Update” on your iDevice or use direct download links below according to your iDevice requirement.
Download iOS 6 for iPhone
Download iOS 6 for iPod Touch
Download iOS 6 for iPad