Andreas Kostyrka andreas at
Fri Apr 6 22:15:20 CEST 2007

* Knight Walker <moko at> [070406 21:31]:
> On Fri, Apr 06, 2007 at 10:31:47AM -0700, Tim Newsom wrote:
> > That seems weird... Even in email you can turn off read receipts... It 
> > seems like an invasion of sort (though a minor one) to not allow 
> > disabling of delivery reports for the receiving party.
> There are two kinds of delivery reports, because I've specifically got
> them turned off in my phone, but my sister still gets them when she sends
> to me, so I think they're network-generated, and that means they will
> only work as far as the network can tell, so if transferring to a
> different network (She's on a different one than I am), she'll only know
> when they're sent to my network, not to me.  And I know my phone doesn't
> send them back, because she has received some when I was out of coverage.

Well, at least in Europe, delivery reports are generated when the SMS
is delivered, no matter what network the recipient is on. OTOH, I once
had a sick case of an SMS to an Aussie number, which was delivered
after a week, and I got the delivery report also when it was delivered.

> > Does the sms message system work while the phone is in call mode? Does 
> > that require multiplex code also like the gprs while on a call does?
> > If it doesn't work while calling, you can always find out when someone 
> > is done talking on the phone / is available to talk (assuming they are 
> > at the phone) by sending an sms with delivery report first... Right?
> It may depend on the phone, but on my current phone yes, SMS can be sent
> and received while I'm on a call. I've had that happen MANY times, and
> my phone isn't one of the ones that can GSM and GPRS at the same time.
I'd guess most if not all phones can do. The only thing that keeps
people from using that is that it's hard to type in a message while
> Assuming that the receipts are sent from the phone, yes, there should be.
> However, if (as I suspect) they are generated by the network, there's
> nothing you can do about them, but they're not terribly accurate to begin
> with.

Well, there is only one way on standard GSM modules to disable SMS
delivery to the phone: When the SIM card SMS slots are filled up. All
phones/modules I've programmed always receive SMS via these storage
slots on the SIM. So I guess filling up these slots would disable SMS


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