Checking new official firmware upgrade while using custom firmware on your Samsung phone or tablet is not an easy task. Because Samsung Kies and built-in software update will not notify you when there is a new firmware released. So you have to check on news website or blog for the latest firmware info. Or you can use Check Fus Downloader to find it out by yourself. In addition, you can also download the official firmware and install it with Odin manually. This is available on Android and Bada platform.