0. Modem is configured (otherwise modem will not be powered on and visible)
1. Copy Firmware "ME909_UPDATE_11.617.24.00.00.FWL", "sz.tar.xz" file and "upd.sh" script
   to the device, into "/home/martem" directory
2. Login as root
3. Execute upd.sh script in "/home/martem" directory:
     sh upd.sh

Check result:
Result is in "huawei_upd.log" file,
or rerun script and it will tell that update is not needed.

Minimal FW: 2016.08.05-linux_4_1-04-65871e8
