JUST DOWNLOAD THE TOOLS and FOLLOW THE UPDATE PROCESS in the SCREENSHOT
[Be sure to remove your sim card and ensure power stability before doing this process]
SMARTBRO B04 UPDATER - MEDIAFIRE
SBW EXTRACTED FW - MEDIAFIRE
It is also applicable with modem in other country just use your updater and replace
the current firmware of the the updater with the SBW Extracted Firmware. MF626 & MF627 Compatible.