Hi Pekka,

> However, 27.007 implies (see, for instance, commentary on +CPIN) that
> things the atmodem voicecall driver takes as granted (+CLCC, +CHLD) do
> not necessary work when there is no SIM or SIM is missing PIN code.
> +CIND polling is only thing promised by spec (however, it did not work
> on my MBM).

I'm not following, why would we ever need +CHLD if the SIM is missing?
Would we ever be able to establish multiple emergency calls to actually
call this?

+CHLD not working when PIN is ready and an emergency 3-way call
situation is another matter though...

> 
> Another thing is the radio handling: making an emergency calls
> requires that radio is explicitly turned on (with AT+CFUN=1). If there
> is no SIM or SIM is missing PIN and radio is on, modem registers with
> its IMEI code (it gets so called limited service). Keeping radio on in
> limited service state just wastes battery (unless you want to make an
> emergency call).
> 

What do you propose here?

Regards,
-Denis