Installation
Install GnomePpp package (gnome-ppp):
sudo apt-get install gnome-ppp
Configuration
Open it in Menu => Internet => Gnome-PPP
Huawei E220 may be detected in /dev/ttyUSB0
Type of modem: USB-Modem
3774000 .
- Telephon : TONE
 - Telephon number: *99#
 - Initialization string : at+cgdcont=1,"IP","Internet"
 
- Options:  
- Desktop integration ACTIVE
 - Ignore Terminal strings ACTIVE
 - All other options: DEACTIVATED