Mobile operator Three UK has begun to notify customers that their indoor 3G femtocell based signal booster device and service (‘Home Signal‘), which harnesses an existing fixed line broadband ISP connection to create its own indoor 3G mobile signal over a specific band, is to be “retired” on 5th September 2022.

The move will not come as a huge surprise because Three UK had already stopped selling their Home Signal devices in 2020, although until now they had continued to support their existing users. On top of that, the operator has already revealed that it plans to switch off their legacy 3G (mobile broadband) network by the end of 2024 (here).

The other main reason for retiring such services is because they’ve largely already been replaced by the spread of Wi-Fi Calling across the UK’s major operators. This uses your home or other internet (broadband) connection to serve mobile calls and text (SMS) messages via WiFi.

The catch is that, for some people, Wi-Fi Calling is still far from perfect (i.e. support varies between phones, and it can struggle to work in areas of weak or congested WiFi). Nevertheless, the writing has clearly been on the wall for their 3G Home Signal service for a long time, and related users are now being notified of its closure (Credits to Tom).

Copy of Three UK’s Customer Message

“We’re just letting you know, that from 05/09/22, we’re retiring our 3G Home Signal Box service. With ongoing investment in our network, and the wide availability of Wi-Fi Calling across the UK, this service should no longer be needed. To find out more click 3.uk/s2c“

The website link provided in the message doesn’t really say much more than that, except to direct customers toward WiFi calling, while providing no alternative to those who may not be able to get such a feature working. In terms of alternatives, Vodafone closed their equivalent service in 2021, while EE followed last month and the only one left is O2’s Boostbox service for business customers (happily this works with both 4G and 3G mobiles).

I have 1 bar of signal on three. I’ve begged and begged for one of these things but they told me they don’t exist / can’t have one / stopped selling etc. They say WiFi calling works for most people. I do have a WiFi calling symbol but whenever someone calls me with it the sound quality is so bad it’s unintelligible or the other person can’t hear me etc.

I’d swap networks, but the only other one here is Vodafone and the speed is really 1999 GPRS speed.

There are some cases where a traditional landline (or VoIP/Digital voice over the broadband with a landline number) is still the only option, and redirect your mobile to the VoIP when at home to ensure you get your calls.

If you have non-mobile based broadband, it usually doesn’t cost anything more per month to have a landline number enabled for it, although if you have heavy usage then an outgoing calls package will add a few quid.

Buy a 4G antenna and a 4G router with a telephone port, use that.

On my previous O2 contract I had two settings for Wi-fi calling on my phone – one to enable it, and one to make it preferred over the mobile network. Since moving to Three, despite using the same phone, I only have the setting to enable it. The icon that shows I’m on wi-fi calling comes on really sporadically despite a consistently good wi-fi connection to my phone, and with O2 the wi-fi calling indicator was on 90% of the time at home.

As far as I understand it, the phone has to decide that the cell network signal/quality isn’t good enough before it decides to swap to WiFi calling. In other words, it would always prefer the GSM network. On my old phone I also used to have an option to switch between preferred and always. However none of it works properly for me. I have a WISP as my broadband, they do a SIP service for VOIP but I’ve taken one with Sipgate but I usually give folks my mobile number not my VOIP one especially since my mobile calls are included in the plan but SIP calls have to come out of my credit.

Wanted one of these boxes for a while as my business unit is a Faraday cage in the middle of the country side that gets no less than 100dB of signal.

WiFi calling does not work on that many devices and they don’t respond to requests to add support to more phones. Why it is a locked down feature idk…

Just means my work uses VOIP instead. Total loss for Three.

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