Phantoms in the Ice Cream Shop!

[AudioMan]

Hi,

Connect it via Ethernet.
WiFi is your very last option
No Bluetooth. This is isn't secured and be aware no password is needed to connect a Phantom.

My thinking as well! Thanks for the confirmation. 
Funny thing now is, I can't get one of the Phantoms to connect via Bluetooth... 

Hello. My system is set exactly the way it is in your diagram. However, you can replace your router/modem+internet with internet from your mobile hotspot+laptop (the laptop is linked to hotspot and is bridged in the settings to output the mobile internet via its Ethernet port).
This way you have alternative source of internet/router without the original router. It should work. If it doesn't, then maybe the fault is not with the original router.

I have tried this method a few times.

Rgds

Okay, great. We will try that out. Thanks!