I have a Free.fr (French) SIM in my iPhone and an EE UK SIM - I received the
message twice.

On 24 Apr 2023, Mark Carver wrote
(in article <kanfcaFcie5U1@mid.individual.net>):

> On 24/04/2023 14:37, S Viemeister wrote:
> > On 24/04/2023 11:39, notya...@gmail.com wrote:
> > > On Monday, 24 April 2023 at 03:02:08 UTC+1, S Viemeister wrote:
> > > > On 24/04/2023 01:59, Java Jive wrote:
> > > > > On 23/04/2023 21:29, S Viemeister wrote:
> > > > > > On 23/04/2023 21:26, Java Jive wrote:
> > > > > > > On 23/04/2023 17:04, Tweed wrote:
> > > > > > > > Further reports suggest some, but not many, 3 sites managed to
> > > > > > > > send the
> > > > > > > > alert.
> > > > > > > I didn't get it in Sutherland.
> > > > > > There's less 4g and 5g in Sutherland, than there is down south.
> > > > > I'm posting this via a Three 4G mobile broadband connection, and my
> > > > > phone is on Three 4G as well, neither received any sort of alert.
> > > > I wasn't in Sutherland when the signal went out.
> > > > When I'm home, my phone is on BT wifi - wonder if I would have received
> > > > the alert?
> > >
> > > It should unless you had mobile data switched off (not quite sure if
> > > the alert is an SMS, MMS or a separate feature), however it seems
> > > millions of Three customers did not get it.
> > I only allow mobile data for the country I'm in. I switch over just
> > before shutting off my phone for take off. So I likely would have
> > received an alert on my UK SIM.
> >
> > Can I assume that had I left mobile data activated on my US SIM, I
> > would have received the alert? Some years ago, I was in the US and had
> > an Italian SIM in my phone - an alert came in on it (in Italian!) due
> > to extreme flooding conditions in the area.
> As I understand it you would have received the message if connected to a
> UK mobile network (Three's cock up not withstanding). So if you were
> roaming abroad using a UK SIM nothing will have happened. Conversely
> people from abroad roaming here, will have received the alert ?