Internet phones and the 2027 copper switch-off

The UK's old copper phone network is being retired. Moving to an internet-based phone now is straightforward, usually cheaper, and lets you keep your existing number.

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What is changing

The traditional phone network — known as the PSTN — is being switched off, with services due to close by 31 January 2027. The infrastructure is decades old, increasingly expensive to maintain, and parts are hard to source. After the switch-off, all calls run over a broadband connection instead.

Any device that plugs into the old wall socket and depends on the copper line — including cordless phones, some alarm systems and telecare devices — may stop working unless it is moved across. It is worth planning the change in good time rather than waiting for a forced switch.

Further reading: Ofcom — the future of landline calls.

Lower cost

An internet phone is often much cheaper than keeping a copper line purely for voice. As an indication, BT's standard landline is around £13 a month, whereas an internet phone line starts from about £1.60 a month.

Keep your number

You do not lose your existing phone number — it moves with you to the new service. It can also be set to ring your mobile at the same time, or to divert to it, so you are reachable whether or not you are at home or at the desk.

What I can do

Explain the options in plain terms, based on how you actually use the phone.
Set up the handset or adapter and connect it to your router.
Arrange number transfer and call routing to your mobile.
Check that alarms, door entry systems or other connected equipment will still work, and advise where they will not.

Will my phone still work in a power cut?

An internet phone needs power to the router, so it will not work in a power cut unless it is on a battery backup. If you rely on the line for emergencies, I will talk through the options — including keeping a charged mobile as backup.

Do I need to change broadband provider?

Not necessarily. In many cases the internet phone service can be added to your existing broadband.

I only use my landline for incoming calls — is it still worth it?

Often yes, because keeping a copper line for that alone is the most expensive way to do it. Routing the number to your mobile may be all you need.

Get ahead of the switch-off

Tell me how you use your phone line and I will explain the simplest way to move it across.

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