friendly interface, great features, and amazing stability, and is the foundation of the iPad. And even as other phones try to catch up, the technologies and features built into iOS 5.1 keeps the ipad way in front of any competitors. Samsung firmware
You will have to use iTunes to upgrade or downgrade your iPad firmware. It is always recommended to update your iPad to the latest firmware. You can also downgrade or restore the firmware, which resets the iPod back to its original state.
Usually if you select to update the iPad firmware, your settings and data are not altered. If your iPad currently has a firmware version before 2.0 and you want to update to firmware version 2.1 or later, all of your settings on your iPad will be wiped off in order to perform a clean installation of the new firmware.
So, iTunes should offer you the chance to make an instant backup of your iPad dependent on what data and media is stored on your iPad and what media is stored in your iTunes collection.
Always make sure you have enough empty space on your PC to store a backup that matches the size of your iPad, either 4gb, 8gb, 16gb and 32gb if you proceed with the this backup.
If you decide to restore your iPad, all your data will be erased including music, videos, contacts, photographs, calendar information, and all other media and all settings are restored to the factory standard.
To update or restore your iPad using the latest firmware ipsw file, firstly download the firmware for your device and shift click on your PC on the update or restore in iTunes and now you will be able to tell iTunes to use the IPSW file which you have downloaded to update or restore your iPad. To download your iPad firmware directly from the Apple website you will have to make sure you are using iTunes 8. Connect your iPad directly to your computer and when iTunes starts up, select your iPad under Devices in the Source List on the left of the summary pane and click Check for Update then click Download and Install. Do not disconnect your iPad until the update has finished. You have now successfully updated your iPad firmware to the latest version.