oh yeah and i tryed to port forward but on the video that i was watching it looked diffrent even tho we both hade asus but yeah that failed to
You have not provided any details on your phone or your VPN (client configuration on the phone and server configuration on the ASUS router) so that limits what help we can provide.
I can say it should work from your phone when on its cellular network or when on a WiFi connection.
i managed to get the port forwarding to work on my modem that also hase a router..... weird stuff but finaly worked