Download Lenovo Tab3 10 Business TB3-X70L official firmware from the link here, and follow the provided flashing instructions instructions to learn how to flash the stock rom.
If you notice that any of the links provided below is broken or doesn’t work, please post in comments section so we fix and update it ASAP.
Download Options
OTA Update
File Name: Lenovo_TB3-X70L_USR_S000020_WC991F6806.zip
Size: 1.2 GB
Android version: 6.0
Firmware Link – Download
Flashtool firmware
File Name: TB3-X70L_S000019_160520_ROW-signed.7z
Size: 1.0 GB
Android version: 6.0
Firmware Link – Download
How to flash
After downloading the Flashtool firmware, follow the instructions here to flash.
The OTA update can be easily flashed via stock recovery.