The latest Android OS, Android 4.2.2 is now available for Galaxy Grand Duos GT-I9082. This version firmware is I9082XXUBMHB is available update on Thailand, Malaysia, Philippines and more. You can check to update your Galaxy Grand Duos GT-I9082 by go to your phones setting and then check for the update.
If your phone is running custom ROM, then you can get the official OTA update. So, the alternative method to update your Galaxy Grand Duos to the latest Android 4.2.2 is bydownload the firmware and manually flash into your phone. But if your phone was rooted or running custom ROM, then you need to manually download the firmware and flash into your Galaxy Grand Duos GT-I9082. But , please take note that flash or modified Galaxy Grand Duos GT-I9082firmware will void the phone warranty.So, Try it on your own risk.
Download Android 4.2.2 I9082XXUBMHB For Galaxy Grand Duos: Link