Global Travel Pass 5G Roaming failing on one of two lines - Provisioning Issue

Hello!

I am currently traveling in an eligible Global Travel Pass country and experiencing a persistent issue with one of my mobile lines. I have two iPhone 17 Pro Max devices on my account; one is connecting to 5G roaming perfectly, while the second is failing to connect to data entirely (strong signal bar but none 5G indicator showed up).

Because one device works in the exact same location, I have confirmed that the local roaming partner's network is functional. This appears to be a line-specific or provisioning issue on the Xfinity backend.

Troubleshooting already completed with phone/chat support:

• Verified "Data Roaming" is toggled ON.

• Reset Network Settings on the affected device multiple times.

• Attempted Manual Network Selection (switching between local carriers).

• Confirmed Global Travel Pass is active on this specific line.

• Standard device restarts.

I haven't had much luck with those steps so far. I'm hoping someone here can help me figure out why this iPhone 17 Pro Max is having trouble connecting while my other device is working fine in the same location.