Modem problem

[MishaX2]

You have to specify your device in /etc/wvdial.conf. You currently have a line saying:

Modem = /dev/ttyACM0

This should not be kept, since apparently your system can't find that device.
Which device right now it is exactly, I don't know. But at least that's where it's going wrong.
I will keep you updated when I find something.

Update: could you try putting this as your device:
/dev/bus/usb/002/003
I don't know if this will work, but let me know...

[Jvdy]

Update: could you try putting this as your device:
/dev/bus/usb/002/003
I don't know if this will work, but let me know...

What do you mean exactly?
Enter it in terminal ???
then I enter it got this error

/dev/bus/usb/002/003
bash: /dev/bus/usb/002/003: No such file or directory

[Jvdy]

You have to specify your device in /etc/wvdial.conf. You currently have a line saying:
This should not be kept, since apparently your system can't find that device.
Which device right now it is exactly, I don't know. But at least that's where it's going wrong.

I ever edit wvdial conf
I've run this command:

sudo gedit /etc/wvdial.conf 

The config file is :

[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
; Phone = <Target Phone Number>
ISDN = 0
; Password = <Your Password>
; Username = <Your Login Name>
Modem = /dev/ttyACM0
Baud = 9600 

Edit

Modem = /dev/ttyUSB0

Modem = /dev/ttyUSB1

Modem = /dev/ttyUSB2

Modem = /dev/ttyUSB3

Modem = /dev/ttyACM1

Modem = /dev/ttyACM2

etc

but nothing works
allways got error saying
cannot open dev/ttyUSB0 no such file/directory
I've another modem that work fine
and it located in dev/ttyUSB2
Connect it to the same port and edit wvdial.conf to dev/ttyUSB2
still can't Detect my ZTE Modem