This is mini Howto in order to install sony vaio vgn-fe31h modem in ubuntu linux.
First we will need to know the kernel release ( uname -r ) that we have, and then we will download the corresponding file with HSF drivers from here.
Unzip the file with unzip hsfmodem*.zip
and install it with sudo dpkg -i hsfmodem*.deb <— need reboot
We will make our wvdial.conf file with sudo wvdialconf /etc/wvdial.conf
Open wvdial.conf with sudo nano /etc/wvdial.conf and add the correct username password and phone number. Save and exit file.
Then just type wvdial from terminal to connect.