What's App/Hub on modem only - UDP? "unable to initiate call"
I have just put my super hub 3 on modem only and connected a TPLink deco M5 system as the wifi just keeps on dropping out. The jury is still out on that but 3 days in and all seems ok.
However, before I did this and now, my wife's work phone (she is a psychotherapist and does 50% of her work via whats app) intermittently says "unable to initiate call". This can be at very bad times for her clients.
I am not a technical whizz and I read on What's App website that it might be something to do with UDP??
If I have put the hub on modem only, is this still a thing? Please excuse my ignorance, I have no idea at which point in the network the UDP is a thing.
Does anyone know if I can do anything about this? This is quite serious for my wife.
Many thanks in advance.