Official support for some variants (like those by Kramer ) requires checking the "R" number (e.g., R:01 or R:05) on the back label. 2. Common Hardware Variants Typical Processor Typical OS Common Branding Standard 3G MediaTek MT6580 Android 8.1 JTY, Generic High Performance MediaTek MT6797 Android 8.0/9.0 Thboxes, Niuniutab Modern Revision Octa-Core 1.5GHz Android 11 Commercial Quad-Core 1.6GHz Android 6.0 Kramer (PoE Touch Panel) 3. How to Update or Reinstall Firmware How to Find and download Firmware file for chinese tablets