Wi-Fi answers
Three Broadband — smart-home gadget keeps going offline
Three Broadband: why does my smart-home gadget keep going offline?
The short answer
Most smart-home kit uses only the slower 2.4 GHz band and needs to be on the same network as your phone. The usual causes are a guest network, a separate 'IoT' network, two different Wi-Fi names, or a router that filters the background chatter these gadgets use to announce themselves.
We publish what breaks for that exact combination and what to change.
| Item | What we have on record |
|---|---|
| Wi-Fi support tier | Supported Wi-Fi |
| WiFiXpert Experience Score | 52/100 |
| Their own Wi-Fi app | Yes |
| Official help page | https://www.three.co.uk/support/home-broadband |
| Service status page | https://www.three.co.uk/support/network-status |
The short answer
- Most smart-home kit uses only the slower 2.4 GHz band and needs to be on the same network as your phone. The usual causes are a guest network, a separate 'IoT' network, two different Wi-Fi names, or a router that filters the background chatter these gadgets use to announce themselves.
Is it the line or the Wi-Fi?
- Test wired next to the router
- Test in the room that struggles
- Write both numbers down with the time
Free things to try first
- Put your phone and the gadget on the same Wi-Fi name — Not the guest network, not a separate 5 GHz name.
- Turn off client or AP isolation — This setting stops devices seeing each other, which breaks most smart-home apps.
- Turn on multicast / mDNS forwarding if your router has it — It is the background chatter speakers and cameras rely on.
Where Three Broadband fits in
- Three Broadband is a "Supported Wi-Fi" provider in our comparison, scoring 52/100 for the Wi-Fi support they actually give you.
- The Three app sets up the 5G hub and personalises the Wi-Fi, but it is mobile broadband — coverage in the home depends on the signal reaching the hub.
- Take dated evidence with you — it changes how the call goes.
If it is not fixed
- Ask for a formal complaint reference
- Six weeks unresolved, or a deadlock letter, opens the free independent route
People also ask
- Is this a Three Broadband fault or my Wi-Fi?
- How do I report this to Three Broadband?
- Will a Three Broadband engineer visit help?
- Can I use my own router with Three Broadband?
If you do end up spending money
Only after the free fixes. Nobody pays to appear here, and no shop link changes anything we say.
- Mesh or a wired second point — only after the free fixes
- Managed Wi-Fi, where the provider owns the fix instead of you
Where this comes from
Related pages
- Three Broadband
- Ring Spotlight Cam Plus (battery) — smart-home gadget keeps going offline
- Ring Video Doorbell — smart-home gadget keeps going offline
- Google Nest Cam — smart-home gadget keeps going offline
- Google Nest Doorbell — smart-home gadget keeps going offline
- Ring Stick Up Cam Pro — smart-home gadget keeps going offline
- Ring Indoor Cam (2nd gen) — smart-home gadget keeps going offline
- Philips Hue Secure camera — smart-home gadget keeps going offline
- GigabitIQ — smart-home gadget keeps going offline