I have now enabled APRS messaging on my igate (G3CWI-6). I set the range filter to m/30 which I think means it will enable messaging within a 30 mile(?) radius of its location.
I have set up a Tracker G3CWI-8 to allow messaging by enabling it for IoS BLE.
I have subscribed to messaging with the APRS.fi Iphone app (~£13). The app has connected to the Tracker BLE. Fiddled around with some other settings and it may now be working.
Can anyone send a message to G3CWI-8 to test?