Subject: Wi-Fi Calling Drops After ~10 Minutes on XB8 with Xfinity Mobile Post: Hello, I recently switched from AT&T to Xfinity Mobile an

Subject: Wi-Fi Calling Drops After ~10 Minutes on XB8 with Xfinity Mobile

Post:

Hello,

I recently switched from AT&T to Xfinity Mobile and also upgraded my Xfinity Internet equipment from the XB7 gateway to the XB8 (model XB8-T). Ever since the switch, my Wi-Fi calling drops consistently after about 10 minutes—even when sitting 5 feet away from the router with a strong connection.

Important details:

• On AT&T + XB7, Wi-Fi calling worked flawlessly.
• Since switching to Xfinity Mobile + XB8, calls drop mid-conversation.
• Internet speeds are excellent (tested during and after drops).
• Weak cellular signal in my area means I depend on Wi-Fi calling.

Troubleshooting I’ve already tried:

• Reset network settings on iPhone
• New SIM card from Xfinity Mobile
• Turned Wi-Fi calling off/on again
• Forced phone to only connect to 2.4 GHz band
• Tested on 5 GHz as well
• Reset modem multiple times
• Ensured iOS and XB8 firmware are up to date
• Turned Wi-Fi security features on/off in the Xfinity app
• Contacted both Mobile and Internet support multiple times (each refers me to the other)

What I suspect:

This appears to be a compatibility issue between the XB8 firmware and Xfinity Mobile Wi-Fi calling (possibly related to SIP ALG, firewall handling, or NAT timeouts). The fact that it worked perfectly with AT&T and the XB7 points to the XB8 as the source of the issue.

Request:

Can this be escalated to engineering or tier-2 support? I’d like to either:

1. Get a firmware fix for XB8 Wi-Fi calling stability, or
2. Swap back to an XB7 gateway if the XB8 issue is unresolved.

Thank you—I rely on Wi-Fi calling as my only reliable way to make calls from home and I use it for my business as calls as well.