Working with GSM modems via AT commands

WHY

Because I just got a Huawei K3520 GSM modem and I'm going to play around with it to make it send notifications in case something at work goes down. Here are the AT commands I found useful.

WHAT

# Entering your pin in case it needs a password.
>AT+CPIN="xxxx"
<OK

# Finding out your service center number
>AT+CSCA?
<+CSCA: "+401234567890",145

# Finding out your own number
>AT+CNUM
+CNUM: "","1234567890",129

#Setting network connection preference ( some might need 2,4 at the end instead of 1,2 )
AT^SYSCFG=2,1,3FFFFFFF,1,2  # for GPRS/EDGE Preferred
AT^SYSCFG=2,2,3FFFFFFF,1,2  # for 3G Preferred
AT^SYSCFG=13,1,3FFFFFFF,1,2 # for GPRS/EDGE Only
AT^SYSCFG=14,2,3FFFFFFF,1,2 # for 3G Only
#The ^Mode status lines mean this:
^MODE:3,2 # indicates GPRS
^MODE:3,3 # indicates EDGE
^MODE:5,4 # indicates 3G
^MODE:5,5 # indicates HSDPA

#Setting OWN Number
AT+CPBS="ON"
AT+CPBW=1,"<number>",,"<name>"
AT+CPBR=1
#Showing OWN Number if set
AT+CNUM

LINKS

Developer's Home Short Message Service / SMS Tutorial - BIG HELP !!!

SMS Messages and the PDU format

Online Javascript PDU Converter

Another Online PDU encoder and decoder

OpenMoko Wiki AT Commands