FLASH new firmware in 4G body camera BM353
connect the body camera to a WIDNOWS PC via USB cable.
install USB driver, qud.win.1.1_installer_10044.7.zip
install QPST tool, qpst.win.2.7_installer_00483.3.zip
run QFIL to burn/FLASH firmware into body camera BM353
in Configuration,check "reset after download"
Select Build Type ---> Flat Build, then Select Programmer , select prog_emmc_firehose_*.mbn file,
click LoadXML,select rawprogram_unspare.xml and patch0.xml ,click Download,
after download finished, reboot, and select to restore to factory default, then reboot again.