Thanks hugely everyone for the great suggestions..
I am not sure if I have stopped it, but I haven't heard it for a couple of days.. but then I never did know exactly what triggered it..
I have a feeling that the Factory Reset I did on the Monitor may have fixed the problem.. But just in case it does come back, does anyone know what this info in the Modem View Log means.
08-29-2021 00:33:31.003 - Modem type: Standard Modem over Bluetooth link
08-29-2021 00:33:31.003 - Modem inf path: mdmbtmdm.inf
08-29-2021 00:33:31.003 - Modem inf section: GenericCellPhone
08-29-2021 00:33:31.003 - Matching hardware ID: bthenum\{00001103-0000-1000-8000-00805f9b34fb}
08-29-2021 00:33:36.164 - Opening the modem device failed with error 00000079
Kind regards