Updating xbox firmware
Installation guide ~ How to install firmware on Samsung Galaxy S3 with Odin?(Video) Download official Samsung Galaxy S3 firmware and stock kernel here, here or here.
A further risk of software upgrades is that they can brick the device being upgraded, such as if power fails while the upgrade is in the middle of being installed.A software or firmware upgrade can be major or minor and the release version code-number increases accordingly.A major upgrade will change the version number, whereas a minor update will often append a ".01", ".02", ".03", etc.Users can often download software and firmware upgrades from the Internet.Often the download is a patch—it does not contain the new version of the software in its entirety, just the changes that need to be made.For example, an upgrade of RAM may not be compatible with existing RAM in a computer.
Other hardware components may not be compatible after either an upgrade or downgrade, due to the non-availability of compatible drivers for the hardware with a specific operating system.
Or you can find them at XDA Forum and Sam Mobile website too.
With Samsung Galaxy S3 unlocked bootloader, you can try other region firmware too.
Upgrading is the process of replacing a product with a newer version of the same product.
In computing and consumer electronics an upgrade is generally a replacement of hardware, software or firmware with a newer or better version, in order to bring the system up to date or to improve its characteristics.
Although developers usually produce upgrades in order to improve a product, there are risks involved—including the possibility that the upgrade will worsen the product.