The upgrade is available OTA (over the air) and via Samsung Kies
Good news for Galaxy Grand DUOS owners in India, as Samsung has just kicked off the rollout of the highly-anticipated Android 4.2.2 Jelly Bean update.As AndroidOS points out, the major update is now available for download either OTA (over the air) or via Samsung Kies desktop software.
Those who wish to avoid installing Kies on their PC will have to wait until they are notified on the availability of the update. To manually check for Android 4.2.2 for Samsung Galaxy Grand DUOS, simply head over to Settings / About phone / Software update.
Given the fact that the file size of the update is about 488MB, we recommend Samsung Galaxy Grand DUOS owners to download it via Wi-Fi to avoid mobile data charges or through Samsung Kies desktop software.