XWUANA1 Firmware installation guide on Samsung Tab 3 8.0Follow these steps: 1. First of all try to fulfil all these pre-requisites. These are the one that will help you with serious/accidental conditions. 2. Now download the official XWUANA1 Firmware file to your computer system. Please don’t try to download it directly to your smartphone as the tool I am going to mention here will work on computers only. 3. Now you will have to install this file on your smartphone. You can do it by Odin tool. You can find all instructions from here. NOTE: For using Odin, you will have to boot your Tab to Download mode. So first switch off your tab and then turn it ON with the combination of Vol. Down + Home keys. You can also use ROM Manager App which can be downloaded directly from the Play Store. After installing this app, you will get Recovery, Download etc booting options. Select Download Mode from there and follow all the above instructions.