Prepare your phone line for the PSTN switch‑off
in an instant
The UK’s traditional phone network is being switched off as part of the PSTN switch‑off, completing in January 2027. If you currently rely on a voice‑only phone line without broadband, your existing service will stop working unless it’s migrated - and legacy phone lines are also expected to see price increases of up to 80%.
We’re helping customers understand what this change means for their setup and identify the most appropriate next step, whether that’s a simple voice replacement or a more specialist solution.
For many voice‑only lines, Instant Line 4G can be a suitable, future‑ready option that keeps your phone number, works without broadband, and can be plugged in where your current phone line already is, with no rewiring required. If your business moves, with Instant Line 4G you can retain your existing phone number no matter where you go. Where phone lines support alarms, lifts, or other safety‑critical services, a specialist‑led approach is required.
Complete the form to request a Phone Line Migration Review, and one of our specialists will help you understand your options and what to do next.
Why you need to take action
As part of the PSTN switch-off, traditional phone services are being withdrawn nationwide. This means older voice‑only phone lines will no longer operate after January 2027, regardless of how lightly they’re used today.
If no action is taken, services relying on these lines - including inbound and outbound calls - may stop working. Planning ahead helps ensure continuity and avoids last‑minute disruption.
A clear path to a compliant phone service
Every phone line is used differently, which is why there’s no one‑size‑fits‑all solution. Our role is to help you identify the right approach based on how your line is used today.
For many customers with simple voice‑only needs, Instant Line 4G provides a straightforward replacement that does not require broadband and allows you to retain your existing phone number.
For more complex or safety‑critical setups, we’ll guide you through a specialist‑led migration to ensure reliability and compliance.
Instant Line 4G is right for you, if:
Your phone line is:
- Used primarily for inbound and outbound voice calls
- Not connected to broadband
- Not supporting alarms, lifts, or other safety‑critical systems
Key features include:
- Designed specifically for voice services
- Keeps your existing phone number
- Uses mobile connectivity rather than broadband
- Built to work after the PSTN switch‑off
Important information for alarm and lift lines
If your phone line supports an alarm system, lift, or other safety‑critical service, it will require a specialist‑led assessment.
These setups are not suitable for a simple like‑for‑like replacement. Our specialists will work with you, and any third‑party providers involved, to ensure the right solution is put in place safely, reliably, and in line with industry requirements.
Completing the form will ensure your enquiry is routed to the correct team.
What to Expect
We evaluate your setup
We’ll look at how your phone line is currently used.
A short migration review
One of our specialists will talk you through your options and answer any questions.
Clear guidance on next steps
Whether your setup is simple or complex, we’ll outline the most appropriate way forward.
There’s no obligation, and no requirement to make an immediate decision.
Get clarity on your phone line before the switch‑off
If you’re unsure how the PSTN switch-off affects your phone line, or what you need to do next, requesting a Phone Line Migration Review is the simplest way to get clarity.
Complete the form and we’ll help you understand your options.
Making IT Work For You
Chess is one of the UK’s leading independent and trusted technology service providers, employing more than 240 skilled people across the UK, supporting over 18,000 organisations.
We believe IT should work for you, reduce costs, deliver efficiency, keep you secure, enhance your work-life balance, improving performance. At Chess, we’re passionate about our unique culture and our continuous investment in our people to be industry experts.
We’re extremely proud that our people voted us No.1 in ‘The Sunday Times 100 Best Companies to Work for’ list 2018, and we continue to celebrate more than 17 years in the top 100.
