Let’s address the elephant in the room. The last stable, official firmware update was Android 8.1 Oreo , released in mid-2019. Since then, there have been no security patches, no bug fixes, and certainly no Android 9, 10, or higher.
If you are unwilling to let go of your TB-X704F due to its excellent screen and speakers, there is a silver lining. Because the device was popular and utilized a common chipset, the developer community adopted it warmly. Lenovo Tb-x704f Android Update
The last security patches for the TB-X704F were released in . The device is now vulnerable to known exploits not patched by Lenovo. Let’s address the elephant in the room
Current (2026) Device: Lenovo TB-X704F (Tab 4 8, Wi-Fi) Original OS: Android 7.1.1 Nougat Final Official OS: Android 8.1 Oreo If you are unwilling to let go of