Gnokii

modem/fax driver for the mobile phones

Install gnokii
Install gnokii with the sms usb use flags enabled.

Configuration
Login with root user.

Edit the /etc/gnokiirc file:

Setup save the password for PIN login

Set PIN to work with gnokii
/usr/sbin/chat is part of net-dialup/ppp

An other way is just using gnokii:

Show the PIN status: