As the topic described, when i was trying to update my iPad to IOS 6, everything fine except it suddenly come out an error saying Unable to activate the iPad.

Then i forgot i click what already ( Maybe i unplug and plug in back my iPad ) and it sync in iTunes again and i did a restore back up of it.

May i know what is it about the error of Activation error ?
How can i know whether my iPad is activated now or not ?

Installed halfway error or already on the setup screen ? Usually jail broken iDevice need to change the authentication from gs.apple.com to original.
Usually that's the main problem for most error.

like this?
but this was when i try activate thru itunes, then i restart my laptop and the ipad. and try again . it works.

Yea it is like this !!!!!!!!! ANy idea ? How can i reactivate my iPad ? How to know my iPad is activated or not ?

probably due to server problem or internet connection.
if still have problm u can just activate thru wifi , no need to sync with itunes first

if u can olredy use your iPad, means that its activated already. want reactivate just restore ur iPad from itunes (shift click restore and select ur firmware)

Ok thx bro I can use my iPad dy, so I think it is already activated
P/s Siri is nice!!! But too bad I m lack of proper US/UK English slang and pronunciation

Try asking Siri to set alarm from Mon to Sat at 7AM. Works for me.