I can't connect my IP CAM outside the local network, so I checked forums where users had the same problem. This is what i did:

1. Added 8.8.8.8 in the DNS server of my router.

2. Opened 554 port on my router.

3. Added a permit rule in the router firewall so i could connect throught the cam Ip allowing every port.

4. Created user/pass using the tapo app and connected throught the Internet over RSTP protocol. 

I could connect using a random app over Mobile Data and using my router public IP.

It works, but I wont be able to control the vision range and settings when out of home.

5. At some point, i even disabled the whole firewall my Internet company brings for security reasons and the app still be telling me the message and not letting me access when using mobile data.

"This smart device can only be controlled locally"

Of course I restarted the Cam, plug/unplug, reset.

My girlfriend cant connect the cam either outside the local network. Am i missing something?

Would appreciate some help, dunno what else to do.