• Install minicom.

  # pacman -S minicom

• Add yourself to the uucp group.
• Check to see if device is recognized.

  # lsusb |grep Huawei
  Bus 002 Device 002: ID 12d1:1573 Huawei Technologies Co., Ltd. 
  
  dmesg |grep CDC
  cdc_ether 2-1:2.0 eth3: register 'cdc_ether' at usb-0000:00:13.2-1, CDC Ethernet Device, 00:a0:c6:41:37:70

• Determine USB tty's.

  # ls /dev |grep -i ttyusb
  ttyUSB0
  ttyUSB1 
  ttyUSB2
  ttyUSB3
  ttyUSB4

  • ttyUSB0: MODEM port: simulated using USB, for AT command interaction and establishing data connection.
  • ttyUSB1: DIAG port: simulated using USB, for DIAG (diagnostic) command interaction (mainly used to debug modules at present).
  • ttyUSB2: PCUI port: simulated using USB, for AT command interaction only.
  • ttyUSB3: GPS NMEA port: simulated using USB, sending unsolicited indications for NMEA positioning data only.
  • ttyUSB4: GPS Control port: simulated using USB, for GPS AT command interaction only.
  • eth3: ECM port: for establishing communication connection.
• Connect to the gsm module.

  # minicom -s

• Go to 'Serial port setup' →
  • Serial Device: /dev/ttyUSB2
  • Bps/Par/Bits: 115200 8N1
• Go back and then to 'Modem and dialing parameter setup'
  • Clear init string and reset string.
• Select 'Save setup as dfl'.
• Select 'Exit'.
• Check SIM.

  AT+CREG?
  +CME ERROR: SIM PIN required

• If you see +CME ERROR: SIM failure check if the SIM card is inserted and the module is in mPCIe 2 slot.
• enter SIM PIN.

  AT+CPIN="1234"
  OK
  
  ^SIMST: 1
  
  ^SRVST: 2
  
  AT+CPIN?
  +CPIN: READY
  
  OK

• Check status operator selection. In this case; 0=automatic, 0=long alfanumeric, string, 2=current.

  AT+COPS?
  +COPS: 0,0,"simyo",2
  
  OK

• Check network status. 0=report off, 1=registered

  AT+CREG?
  +CREG: 0,1
  
  OK

• Query signal strength. Good signal strength here: -79 dBm (17 * 2 – 113).

  AT+CSQ
  +CSQ: 17,99
  
  OK

# pacman -S gammu dialog
# gammu --identify
# gammu --networkinfo
# gammu --monitor 1
# echo "Testing a test." | gammu --sendsms TEXT +31623456789

sudo mkdir /var/log/gammu
sudo chown root.uucp /var/log/gammu
sudo chmod 775 /var/log/gammu

gammu-config

cat ~/.gammurc 
port = /dev/ttyUSB2
connection = at
synchronizetime = no
logfile = /var/log/gammu/gammu.log
logformat = textall

dmesg |grep cdc_ether
[   13.265612] cdc_ether 2-1:2.0 eth3: register 'cdc_ether' at usb-0000:00:13.2-1, CDC Ethernet Device, 00:a0:c6:41:37:70
[   13.265743] usbcore: registered new interface driver cdc_ether
[   13.705124] cdc_ether 2-1:2.0 enp0s19f2u1c2: renamed from eth3

Configure NDIS dialing, and APN:
echo "at^ndisdup=1,1,portalmmm.nl" >


at^ndisdup=1,1,"portalmmm.nl"

dhclient -v enp0s19f2u1c2

pacman -S ppp 
cp /etc/netctl/examples/mobile_ppp /etc/netctl/
vi  /etc/netctl/mobile_ppp
netctl start mobile_ppp

Firmware version:
AT+GMR
AT+CGMR

Manufacturer:
AT+GMI
AT+CGMI

Model:
AT+GMM
AT+CGMM

Serial:
AT+GSN
AT+CGSN

IMEI:
AT^IMEISV?

Chip temperature (0.1 deg. C)
AT^CHIPTEMP?