through /dev/ttyUSB2 but old OS’ won’t pick these up and will instead have /dev/tts/USB0 through /dev/tts/USB2, which are located on all systems, the ttyUSB being symbolic links anyway. The contents of /etc/ppp/chat/3G-connect should read as follows (for Vodafone 3G, other providers’ details can be found at the end of the code): ABORT