The Fit 4G Smart M01 official firmware available in this post can be flashed via SP Flashtool. If you don’t already have SP flashtool on your PC, not to worry, it is contained in the zip file.
After download, please follow instructions contained at post end for flashing the package.
Downloads
Fit 4G Smart M01 – Download
Alternate download links:
Flashing Instructions
To use SP flashtool contained in the download zip file, navigate to C:\…\Fit 4G Smart Upgrade\Flash tool\.
The firmware files are in C:\…\Fit 4G Smart Upgrade\M01 Firmware\Fit_4G_Smart_M01B04_2015-05-06-17-03\.
Follow this link for complete flashing instructions https://www.leakite.com/easy-mtk-firmware-flashing-installation/