[q] rooted at&t lg optimus g pro kitkat update topic

Hi,

I am based in India and I bought AT&T LG Optimus G Pro from USA and got it unlocked in India. Also I got it rooted as well.

Now whenever I am trying to do software update, the message comes "Your phone is not registered yet".

Is it possible to get OTA update released by AT&T without registering? If no, then what should I do for it?

Also since it is rooted, Can I get Latest Lollipop/ Kitkat android on it?

Please confirm.

Thanks.

Sumeet