Previously we shown up a quick tutorial for installing official Android 4.0.3 update on both Sony Xperia Arc LT15i / Arc S LT18i. Sony has released same ICS firmware 4.1.A.0.562 version for both android phones. Both devices look identical to each other and they have been loaded with similar features and specifications. The name itself indicates that it was official update so it doesn’t come with pre-rooted; we need to root it manually for both Sony Xperia Arc LT15i / Arc S LT18i with some rooting applications DooMLoRD’s kernel and flashing it via Fastboot. The clockworkmod recovery will help you install some important zip files directly from the phone itself and it will be time saving process for all users.