Freestyle Libre not working?

This is a really interesting thread. I'm on my 2nd Libre 2 sensor. The first one was faulty and I kept getting various error messages, including no sensor found. Abbott replaced it and didn't want the faulty one.
The 2nd sensor will scan but the alarms don't function, I'm getting error messages
Alarms unavailable due to one or more of the following
Channel notifications disabled
Lock screen notifications disabled
Notification sounds disabled
Sound and pop up notifications disabled

Anyone any idea how to fix this?????? I can't find any of these on my phone Samsung Galaxy A20e

 

This was a most helpful thread as I think the nfc issue applies to me. Only issue is I’m not THAT technical and I have an iPhone SE which doesn’t have a switch to shut down / restart nfc to re-set. Any ideas?

I did call Abbot and they say it’s a sensor failure. (The call centre said it definitely wasn’t my phone , but I’m fairly sure it is as I have now applied a new sensor and still no joy)

Any help gratefully received!

 

Is it the original iPhone SE, or the 2020 version? A quick google said that if it's the 2020 one, you can't turn NFC off and on.