Re: [PATCH 4/4] Add a MessageWaiting interface to track message waiting indications.

[Denis Kenzior <denkenz@gmail.com>]

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Hi Andrew,

> 2009/8/5 Denis Kenzior <denkenz@gmail.com>:
> > Hi Andrew,
> >
> >> > For setting mailbox numbers, a working EF-MBDN is required since the
> >> > only alternative would be to store them on the filesystem.
> >>
> >> mw_set_indicator does the right thing, I missed this fact.  But when a
> >> mailbox number is set or received from network all clients get a
> >> PropertyChanged and the new number can be retrieved from the interface
> >> but only when the store succeeded, previously it would be available
> >> regardless of MBDN on the card and the writing to card was secondary.
> >> The number is kind of important if you want to hear the messages.
> >
> > So you're right that even if we get an enhanced voice mail notification
> > message the Mailbox number won't be signaled unless we have the SIM
> > provisioned with EF-MBI & EF-MBDN.
> >
> > The problem is, if we don't have the SIM files available, then the next
> > time oFono is restarted this information is lost anyway until the next
> > MWI notification arrives.  So you're back to not being able to dial the
> > mailbox.
> >
> > This is also an issue with the indications themselves.  If we don't have
> > EF- MWIS provisioned, the information is lost when oFono is restarted.
> >  So we're now inconsistent between MBDN/MWIS, so maybe we shouldn't
> > update them either in this case.
>
> True.  (or update them both in this case)
>
> It would make sense for the providers to resend the MWI information
> everytime subscriber connects the network and then it would be less
> problematic in case the information couldn't be written to SIM, but I
> don't know if they ever do this.

Probably they don't, there are also weird roaming cases to consider, where you 
receive MWI, turn phone off, step on a plane and turn phone on with some other 
network entirely.

Can we make the MWI interface smarter somehow?  Perhaps by not enabling it 
unless at least the EFmwis file is available, or by always storing the EFmwis 
contents on the filesystem?

Regards,
-Denis