Are you trying to the device for a new SIM, or are you trying to repair a connection error?
Modifying device firmware can permanently damage your hardware if interrupted or done incorrectly. @IAMmwagalwa MF927u.zip
After a successful unlock, you may need to log into the web interface (usually 192.168.0.1 ) using the default credentials "admin / admin" to configure your new APN. Are you trying to the device for a