Mt6735 Database File. Below is a link to the current firmware version for the DB transmitter. This is a zip file, after downloading extract it into a temporary folder. Use the USB Firmware Updater program to update firmware. Jan 27, 2015. Is the nvram.bin file you have provided is a raw file? Home ZTE Firmware ZTE BLADE V7 LITE + NVRAM CM2 Backup Last update.