will first you need to install the modem drivers the tool i use to make the connection is wvdial so 1.apt-get install wvdial 2.configer the vim /etc/wvdial.conf file will for my isp its work like that : (you only need to compare and change it) [Dialer Defaults] Init1 = ATZ #Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Init2 = AT+CGDCONT=1,"IP","internetg" Modem Type = Analog Modem Baud = 460800 New PPPD = yes Modem = /dev/ttyUSB0 ISDN = 0 Phone = *99# Password = cellcom Username = cellcom save it and run it with the command " wvdial " have fun ! :-) OR use the script : for HSDPA [Dialer Defaults] Phone = *99# Username = cellcom Password = cellcom Stupid Mode = 1 Dial Command = ATDT [Dialer hsdpa] Modem = /dev/ttyUSB0 Baud = 460800 Init1 = ATZ Init2 = AT+CGDCONT=1,"IP","internetg" ISDN = 0 and to connect use : "wvdial hsdpa"