Mobile telephone alert notifications

When I lived in Eastern Tennessee, occasionally my mobile telephone would sound with a broadcast notification, typically amber alerts about children in a different Grand Division. The alarm usually sounded at the worst possible time, I remember one was when I was at the closing for my house purchase. I would hit OK to silence it then, at least under Android, I could find no way afterward to find what the message had been.

They are rolling out such a broadcast system in the UK and yesterday we had a test. It didn't actually reach everybody's mobile telephone, even if household members right next to them, on the same plan, did receive it. For some users, like R., their telephone subsequently lost data connectivity, even after reboots, etc. This morning, R. found a cure: turn data roaming on for a while, then off again.