Download the Lenovo Tab3 10 Business TB3-X70F official firmware from the link here, and follow the provided flashing instructions to learn how to flash the stock rom.
If you notice that any of the links provided below are broken or don’t work, please post it in the comments section so we can fix and update it ASAP.
Download Options
OTA Updates
File Name: Lenovo_TB3-X70F_S000026_WC0E305514.zip
Size: 1.2 GB
Android version: 6.0
Firmware – Download
Flashtool firmware
File Name: TB3-X70F_S000025_160527_ROW-signed.7z
Size: 980 MB
Android version: 6.0
Firmware – Download
How to flash
After downloading the Flashtool firmware, follow the instructions here to flash it.
The OTA update can be easily flashed via stock recovery.