"Fully accessible outside your network" but I can't access it through my phone's LTE

[tom80H]

Can you connect to your server from outside your home network using a different connection?

Here’s some more troubleshooting steps you could try to verify your remote access is actually working:

The Basics of Remote Access Troubleshooting

When it comes to remote access, there’s a lot of different factors which can impact your setup. Some are under your own control, others not so much. First off… there’s a dedicated support article on troubleshooting your remote access. I strongly recommend you have a look at that. Find below some additional remarks on how to troubleshoot your remote access setup. Review your internet access / remote access configuration It’s good practice to review if Plex gets the correct public IP address…