# gammu sendsms TEXT +963934241036
Enter message text and press ^D:
hello there
:)
If you want break, press Ctrl+C...
Sending SMS 1/1....waiting for network answer..error 500, message reference=-1

# gammu --identify
Manufacturer         : huawei
Model                : unknown (E1550)
Firmware             : 11.608.13.01.135
IMEI                 : xxxxxxxxxxxxxxx
SIM IMSI             : xxxxxxxxxxxxxxx

# gammu --networkinfo
Network state        : requesting network

# cat .gammurc
[gammu]
port=/dev/ttyUSB0
connection=at
name=huawei e1550
model=

# ls /dev/ttyUSB*
/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2