Thanks Peter,
I tried your instructions (the only thing different to what I've tried before was turning off wifi an enabling the mobile hotspot. Don't see these should make a different, but I tried anyway!)
Alas, it made no difference. My Galaxy S6 & iPad 3 refuse to talk over Bluetooth.
I don't think "To download updates, PAW's WiFi would need to be configured as a 'Client' and as Lee has told us several times in the past, it has to be configured as a 'host' so it can supply the necessary data to the Nav systems." is the full store though.
Plenty of devices act as clients and supply information to other devices across the network. But there may be something else going on for which the PAW needs to be the host.
It's a pity though, was it will lead to complications as more devices become connected in the cockpit, where people have to choose between their PAW and some other device that also insists on being the host.