I've recetly switched to a 4g router and unlimted data SIM running on the Vodafone UK network.
The router is doing internet stuff fine and working well.
However I want to setup an openVPN server on the router.
This is to access my home network securely.
I've used a TP Link dynanmic DNS and tried setting up open VPN.

I've used Port 1194 and UDP.
Unfortunately so far I haven't been able to connect to the VPN.
I am primarily using my phone to try and connect.

Any ideas?

Edit - I'm starting to wonder if my IP address is public