This is an old revision of the document!
https://www.thefanclub.co.za/how-to/how-setup-usb-3g-modem-raspberry-pi-using-usbmodeswitch-and-wvdial
https://www.raspberrypi.org/forums/viewtopic.php?t=75493
http://raspberry-at-home.com/installing-3g-modem/
