....as this latest upgrade fixes significant issues interacting with Exchange/Outlook email systems that reduce battery life and cause wireless network problems.
And as soon as IoS 6.1.3 comes out put that on too as that will sort the screen lock security flaw....which of course if you receive NMIT email on your iPad, you MUST have enabled..!
You'll see a red circle by your Settings icon with a number in when there's an IoS update ready and waiting....