Finally had finished updating my wife's galaxy s2 GT I9100 from ICS to Jelly Bean. Sekarang all devices in our home are running 4.1.2 termasuk 7.0 plus dan Note 2. Hanya ipad, Blackberry and our nokia's je yg lain.
It was 71% battery at the start of the ota update and 56% after it finishes all the process. Update was done using unifi wifi. Overall smooth process. Semalam saya receive another update for note 2 but i think it was a minor one as no difference were seen.