forbid Roaming

[A. Valentin]

Hi Dan,

thanks for your hint. I've detected in my tests yesterday that manual
network selection forces me to also set the technology / radio type. And
that is not a solution.
I think I will check the roaming state from qmi and loop over it while
the connection is alive. Perhaps in future, when modemmanager is
available in openwrt, this is a better alternative.

André


Am 09.01.2013 22:02, schrieb Dan Williams:
> On Wed, 2013-01-09 at 16:27 +0100, A. Valentin wrote:
>> Hi Aleksander
>>
>> Am 09.01.2013 16:15, schrieb Aleksander Morgado:
>>> What happens if you force it to re-register? Maybe it just doesn't
>>> honour the new request until you re-register. 
>> Even if I switch the device off, the roaming flag is still set. Seems to
>> be permanently stored. And it registers.....
> It's probably the same internally as the QCDM "RoamPref" NV item, which
> may only be relevant for CDMA devices.  In which case it may be
> available to set, but simply ignored for 3GPP devices, since roaming
> isn't handled the same way there.
>
>> Another idea is to only allow manual network selection if roaming is
>> disabled in frontend.
>> Perhaps that's the best workaround...
> Forcing manual network selection can break in-network roaming when your
> operator uses multiple MCC/MNCs, which occurs often in the USA and
> India.  Manual selection isn't a great fix for this.
>
> I think instead that the modem manager should be handling roaming
> control, instead of trying to hack around this at the firmware level.
> For most cases, CREG or the QMI "roaming indicator" will show the
> correct roaming state (determined though various SIM filesystem tables
> and network information) which the connection manager can use to
> terminate the connection if the user has elected to disable roaming.
>
> In short: don't expect libqmi to be a connection manager, that's not
> what it's for.  It speaks QMI only, and leaves the actual interesting
> logic to something like ModemManager.
>
> Dan
>
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