JOINING BOOST & ACTIVATING YOUR SIM
SETUP & PHONE SUPPORT
RECHARGE & NETWORK SUPPORT
PureVPN believes that Boost is blocking UDP, TCP & IKEV protocols that the app uses to connect. (Android Samsung phone)
I don't recall having this issue when I was with Telstra directly
Does anyone know why and what the solution is?
That wouldn't make much sense, Boost Mobile uses Telstra APN so it would be routing pretty much the same way. I have used NordVPN on a mobile service on Boost without hassle as well as on Telstra directly.
You could try support, but sadly I think it might be above their skillset. http://livechat.boost.com.au