BY booraja
Most of you might be aware of how to update your Samsung Galaxy Grand duos but in case if you are not sure on how to do this, Here is a simple step by step guide to make your device updated with latest firmware version.
 
Note: This update is not an update for the Android Version. Before updating and after updating Android v4.1.2 remains as it is.

Steps to Update your Samsung Galaxy Grand Duos

Checking For Updates in Samsung Galaxy Grand Duos
Checking For Updates in Samsung Galaxy Grand Duos
Step 1: Navigate to the setting options and scroll to the last option. You will find the option “About Device”. Click on that option.
Step 2: Then you will be welcomed with a screen with several information about current status of your device. On the top you will find the option “Software Update”. Click on that. You will be presented with 3 options. Select the first option to check whether any update is available for you or not.
Note: If you haven’t updated your device even once then you might not get this update. Instead you will be shown some other update. This is because for installing this update your device needs to have all the previous updates installed on it. For this just follow this procedure repeatedly. You may get two or more updates to install before getting this final update.
Android v4.2.2 update is finally out. Click the link to know how to update your Samsung Galaxy grand Duos to official Android v4.2.2 JellyBean OS. GRAND DUOS V4.2.2 UPDATE 
CONTACTIVE – BEST APPLICTION FOR ANDROID
Step 3: Once you get any update listed on your screen it will automatically start downloading it.
Note: By default, Downloads are set to be downloaded via Wi-Fi only. If you are downloading your software update via mobile network, you first need to disable it by de-selecting the last option “Wi-Fi only”. Once you disable it, you can download update for your Samsung Galaxy Grand Duos via your mobile network.
Step 4: Once your update for Samsung Galaxy Grand Duos will be downloaded, it will ask you to schedule update for installing it later or install it at the same time. Depending upon your choice you can select the desired option.
Step 5: While updating your device will reboot and it will install the software. After installing the device will restart and you will be notified about the successful installation of the update on your Galaxy Grand Duos.

Updating Samsung Galaxy Grand Duos
Updating Samsung Galaxy Grand Duos
Repeat these steps till you get no more updates to install.
Note : You can also automate this process by checking the options “Auto Update”. This will automatically do all the works for you. It will notify you whenever any new update is available and will automatically download it. You just need to install it