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What it looks like on your phone

Mon Sep 28, 2026

Five phones actually on the network

iPhone 7

A 2016 iPhone. Supports VoLTE once turned on explicitly. Fully functional.

iPhone 7 home screen showing carrier W2FBI.XCL.IS on LTE
That's our network up in the status bar, on LTE.

iPhone 12 mini

A newer one, same story. Still have to turn on VoLTE.

iPhone 12 mini Control Center showing W2FBI.XCL.IS
Still W2FBI.XCL.IS, straight from Control Center.

Moto G

The Moto 5G stylus whatever model. I believe I needed carrier privileges to enable IMS.

Moto carrier settings recognizing the network
The carrier menu knows us: 4G calling, VoLTE, network W2FBI.XCL.IS.
Android internet panel: xcl.is connected on 4G
On, and on 4G.
portal.xcl.im network apps list
portal.xcl.im, where the network runs its own services: file drop, user directory, live status, speedtest, F-Droid, single sign-on, Nextcloud.
User directory showing who is online with call and SMS buttons
Who's on right now. Call them or text them.
xcl.is speedtest: 54.7 Mbps down, 5.51 Mbps up
A speedtest over the air: 54.7 down, 5.51 up, 60 ms.

Sonim XP8

IMS fully working, including video calling. Only current candidate for eMBMS experimentation.

Sonim XP8 home screen showing W2FBI.XCL.IS
W2FBI.XCL.IS, same as the rest.

W6 Pro

The W6 Pro. Pretty sure this needed carrier privs for IMS too. It’s been a while.



This phone wouldn't attach on stock Open5GS at all, now it has VoLTE fully working.
W6 Pro VoLTE video calling settings
Video calling over VoLTE, negotiated on the network.
W6 Pro data usage labeled xcl.is
A data meter, and it says xcl.is.

Bonus: EPC

A snapshot of the visualization of the EPC.

CoreDump snapshot: node graph, attached UEs, events, DNS, and packet feed
Screenshot of a graph of nodes, showing the software stack behind XCL.is. Dots flow between different nodes to indicate data movement. Lists of eNBs, UE on the left, packets and other events on the right.

Each phone is a little different. Open5GS had some bugs, and will have some more bugs.
That’s part of the experimentation and fun.