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#1 2013-12-31 13:14:29

Ashen91
Member
Registered: 2013-12-31
Posts: 3

[SOLVED] 4G ZTE MF823 Modem - no connection

Hi everyone.

I've been enjoying Archlinux until now without big problems, but here is one I can't deal with.
I bought a ZTE MF823 modem, it works perfectly on Windows, but I can't make it work in Linux.

It's identified correctly by lsusb:

Bus 003 Device 019: ID 19d2:1403 ZTE WCDMA Technologies MSM 

PID 1403 is a RNDIS (modem only) mode, I switched it on Windows entering some commands in diagnostics mode via putty.
Before that, it's was identifying as 1225 (out of the box mode) and then 1405 mode (usb_modeswtich did it of the box for that)


Finally I can't make it work on Linux, if I check /dev/ttyUSB0, it doesn't exist, so I can't dial it with wvdial. It appears only in diagnostic mode (PID 0016), but is not usable anyway.
I tried to load the drivers with:

 # modprobe usbserial vendor="0x19d2" product="1403" 

and tried with product="1405" in that mode, but no way.

In networkmanager-applet there's a Ethernet connetction named ZTE WCDMA Technologies MSM, it seems to be connetcted, but doesn't work. Adding a GSM connection finished, doesn't appear available for connection.
Dmesg shows that network interface usb0 was renamed to enp0s16f3u2, it's seen in ifconfig


Am I missing something obvious? I tried many ways mentioned in Wiki and other forums, but I'm out of ideas for now.
Please help smile

Last edited by Ashen91 (2014-01-05 18:13:55)

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#2 2014-01-01 14:42:55

Ashen91
Member
Registered: 2013-12-31
Posts: 3

Re: [SOLVED] 4G ZTE MF823 Modem - no connection

I finally made /dev/ttyUSB0 and ttyUSB1 appear by adding 19d2 1405 to /sys/bus/usb-serial/drivers/option1/new_id1.
But still no luck when dialing them. Error message is:

Device or resource busy

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#3 2014-01-05 18:13:28

Ashen91
Member
Registered: 2013-12-31
Posts: 3

Re: [SOLVED] 4G ZTE MF823 Modem - no connection

Problem is solved: you don't need to operate it as modem (ttyUSB*), it appears as a ethernet interface.
But there's one important thing: to connect to a network, you need to follow the link:

http://192.168.0.1/goform/goform_set_cm … CT_NETWORK

The modem will start to blink and internet will flow!

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