God bless the RssReader v18.104.22.168 … Made my life easier =P
Hackaday published an article about a hardware which can be used to mess around with SIM cards… You can read and write!
Adafruit Industries made their SIM card reader kit which allows you to read and write any SIM card (even though the word “ANY” scares me out… But I’ll use it since Hackaday did)…
As you can see, you can connect it to your Serial Port and connecting a 9v battery. Or connect an FTDI USB cable to the extra pins just like the Boarduino. The FTDI USB provides power from the bus so you wouldn’t need the 9v battery.