I'm uncomfortable with it tbh. Mainly because I don't want a world where we are all tied to smartphones, but it also raises some questions about government overreach and the whole 'thin end of the wedge' thing.
I note you will be able to turn the settings off (which I would probably do on principle!) but this doesn't sound right, does it?
"A message will appear on the home screens of people's devices during the test, with vibration and a loud warning sound that will ring for about 10 seconds, even if the phone is set to silent."