ARC unable to connect to cellular, only Wi-Fi (ref#XLC4KQ)

Network Setup

· I use my ISP's router alongside a personal router.

ARC Status

· ARC is *Ready*

Describe the issue

not connected into the cellular only wifi ..

Describe your network setup

TM Malaysia
Nucleus One
1 link to my Apple iPad and mobile
Running from my home set up

Hello @sudesh,

Welcome to the community!

It’s quite unusual for ARC to show a “Ready” status but then fail specifically when you switch to cellular. Usually, if it works on Wi-Fi but not on LTE/5G, there is a hidden communication gap between your Nucleus and the outside world.

To help us get to the bottom of this, could you please share a screenshot of your Settings -> Roon ARC page from your Roon Server?

I’d like to verify that “Ready” message and see if there are any diagnostic codes hidden underneath it. Since you are using TM Malaysia with both an ISP router and a personal router, we are often dealing with a “Double NAT” situation where the connection looks good internally but is blocked at the second gateway.

On your mobile device, ensure that the Roon ARC app has permission to use Cellular Data in your phone’s system settings.

Once we have that screenshot, we can see exactly what the “handshake” is doing!

Hi @sudesh,

What do you see in ARC currently under Settings for your cloud and server connectivity status? Are you able to share a screenshot here?

Did you configure port forwarding manually or via automatic configuration in Settings → Roon? Or do you rely on Tailscale?

We’ll watch for your reply. Thank you!