ZTE 403ZT supported ?

[Bjørn Mork]

Gopakumar Choorakkot Edakkunni <gopakumar.c.e at gmail.com> writes:

> Hi modem experts,
>
> Is the latest and greatest ZTE 403ZT modem supported by qmi or linux
> serial ? I tried plugging it in, it does create ttyUSB0/1 interfaces,
> but no wwan interfaces. The ttyUSB doesn't respond to AT commands
> either

You can safely assume that any new ZTE modems are unsupported.  They do
their best to prevent any generic support.

Each ZTE device has a unique function layout, with no hints whatsoever.
So the support depends on someone with the actual device figuring out
what the different functions are.  The easiest way is usually inspecting
the Windows driver package.  The *.inf files describe the relationship
between Windows drivers and USB pid/vid/interfaces.  Most of the time
you can guess the function based on the Windows driver name.  But it's
best to verify the guesswork, which can only be done with someone having
access to the device.

So:
1) dig up the Windows *.inf file for your modem
2) run "lsusb -v" on Linux and try to match the output against the *,inf
3) start testing existing Linux drivers based on the above
4) report your findings

Reports in the form of patches against the drivers are preferred, but
any form will do.  Just make sure to include a description of your
device and testing, so that we know how you came to the conclusion in
case some question shows up later.


Bjørn