Re: 4G internet connection (LTE) on Huawei E398

[Marcel Holtmann <marcel holtmann org>]

Hi Dan,

> > > I can't connect to 4G using Huawei E398 on Ubuntu 11.10.  Connection to
> > > 3G work fine.
> > >
> > > Are you planning to implement in the near future 4G network service in
> > > network-manager? Can I help somehow?
> > >
> > 
> > There is work in progress in ModemManager to support LTE devices.
> > 
> > Which are the specific issues you face when connecting in 4G mode? You 
> > could help us by providing ModemManager debug logs as explained in the 
> > "Debugging NetworkManager 0.8 and 0.9 3G connections" section at 
> > https://live.gnome.org/NetworkManager/Debugging
> 
> That device is the one Bjorn was working on supporting via the cdc-wdm
> and qmi_wwan drivers on the kernel side.  It's got an AT port I think
> but we really, really want to use QMI and the net port for it.

actually the EPS AT commands for the E398 are broken. If you would try
to use them, in most cases the modem will just crash. I bet that the
manufactures will need a long time to get these anywhere near stable.

And on the same note, the Sierra LTE cards just hides this behind the
PDP AT commands. That is also not conforming to the specification.

As of today, I have not seen a single LTE modem, that behaves properly
according to 27.007.

Regards

Marcel