Pertama, eject "removable disk" dengan nautilus, jangan safely remove.
Kedua, gksudo gedit /etc/wvdial.conf
[Dialer Defaults]
Modem = /dev/ttyACM0
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CGDCONT=1,"IP","axis"
Modem Type = USB Modem
Phone = *99#
Carrier Check = yes
Stupid mode = yes
Username = axis
Password = 123456
Dial Attempts = 0
Auto DNS = 1
Baud = 460800