Might not be the case now, but I seem to remember MNO’s (certainly Orange) used 
to intercept 999 calls back in the day to reduce pocket dials etc from tying up 
the 999 operators. Once your call was validated as a genuine call you would be 
passed to the ‘real’ 999 operator.


From: uknof [mailto:[email protected]] On Behalf Of Joseph 
McDougall
Sent: 18 October 2019 21:36
To: David Walters
Cc: [email protected]; Ben Oliver
Subject: Re: [uknof] [Ext] Re: Three hosed. Make it right please!

On Fri, 18 Oct 2019 at 12:01, David Walters 
<[email protected]<mailto:[email protected]>> wrote:
On Fri, Oct 18, 2019 at 10:33 AM Ben Oliver 
<[email protected]<mailto:[email protected]>> wrote:
>
> On 2019-10-17 17:15:38, Leo Vegoda wrote:
> >I was under the impression that the mobile networks all allow a powered
> >up phone to call 112 or 999 even if there is no SIM card in there. Is
> >that not the case?
>
> I too thought this was the case. I just pulled the SIM on my phone and
> it says 'emergency calls only'.

It depends on how the mobile network is configured. Wikipedia has an
unsourced claim that UK networks don't allow it due to hoax calls.

If for some reason it's important that you have a phone that calls 999, you can 
always arrange a test call.

Email [email protected]<mailto:[email protected]> and they'll send you a 
script. They'll need to know the CLI you'll be presenting (ie the mobile 
number) and the time you want to do it all

This is usually used for confirmation routing of a PBX, but I don't see why 
they'd reject your request to test the mobile.

BTW they'll ask you to test 112 as well.
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