⚠ BT One Phone switched off March 2026

BT One Phone alternative —
find your replacement

BT One Phone is gone. Your business needs a replacement that keeps everyone reachable — whether they're at a desk, on the road, or working from home. We compare every option so you don't have to.

📞 Number porting available — keep your existing business numbers when you switch
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What was BT One Phone?

Why BT One Phone was switched off

BT One Phone combined a business mobile SIM with a hosted phone system — one number that rang on your desk phone and mobile simultaneously. It was popular with field teams, sales staff and businesses with mobile workers. BT withdrew the service in March 2026 as part of its transition away from legacy telephony infrastructure ahead of the full PSTN switch-off in January 2027.

What you had
One number, desk + mobile
Hunt groups, voicemail, call management
What you need
Same features, modern platform
App, SIM or desk phone — or all three
Key concern
Keep your numbers
All providers support porting — no disruption
Cost
From £9.95/user/mo
Most replacements cost less than BT One Phone
Compare options

Best BT One Phone alternatives in the UK

Four main replacements — the right one depends on whether your team works mostly at desks, mostly on the move, or a mix of both.

Best value · Most flexible

GoYap

£9.95 + VAT/user/mo

The most flexible replacement — works on mobile, desktop and desk phone. One system, one number, every device. UK-based support, no 60-month lock-in.

  • Mobile app — iOS and Android
  • Desktop softphone — Windows, Mac, Linux
  • IP desk phone support
  • Business DDI included
  • Hunt groups and call queues
  • On-demand call recording
  • Voicemail to email
  • 12-month term — no 60-month lock-in
  • Number porting included
Get a GoYap quote →
Mobile-first · SIM-based

PiPcall Mobile+

From £10+ + VAT/user/mo

BT's officially recommended successor — calls route over the mobile voice network via SIM or eSIM, through the native dialler. No app needed on the handset.

  • SIM or eSIM — no app required for calls
  • Native dialler experience
  • Business DDI included
  • Hunt groups and auto-attendant
  • Desktop softphone available
  • Number porting included
Compare with GoYap
SIM/eSIM · EE network

ONSIM

£10 + VAT/user/mo

SIM or eSIM service running on EE's network — same coverage as BT One Phone. Business calling features at network level, no app. Unlimited calls and texts.

  • EE masts — identical coverage to BT One Phone
  • Unlimited UK calls and texts
  • Business DDI and landline CLI
  • Hunt groups, call recording
  • Web portal management
  • Number porting included
Compare with GoYap
60-month contract · BT only

BT Cloud Voice

From £9.52 + VAT/user/mo

BT's own replacement — desk-based hosted VoIP. Good for office teams already on BT broadband. Weaker for mobile workers. Long contract commitment required.

  • Desk phone focused
  • Auto-attendant and hunt groups
  • BT network reliability
  • BT Business Mobile add-on for mobile workers
⚠ Requires 60-month contract commitment
Compare with GoYap
Feature comparison

Side-by-side comparison

All prices exclude VAT. Features and pricing correct as of May 2026.

Feature GoYap PiPcall Mobile+ ONSIM BT Cloud Voice
Price from £9.95/user/mo £10+/user/mo £10/user/mo £9.52/user/mo
Contract term 12 months 12 months 12 months 60 months
Mobile app ✓ iOS & Android ✓ Available ✗ Web portal only ✓ With mobile add-on
Desktop softphone ✓ Win, Mac, Linux ✓ Available ✗ ~ Limited
Desk phone support ✓ ✓ BT compatible ✗ ✓
SIM / eSIM calling ✗ App-based ✓ Native dialler ✓ EE network ✗
Business DDI included ✓ ✓ ✓ ✓
Hunt groups ✓ ✓ ✓ ✓
Call recording ✓ On demand ✓ ✓ ✓
Voicemail to email ✓ ✓ ✓ ✓
Number porting ✓ Included ✓ Included ✓ Included ✓ Included
UK-based support ✓ ✓ ✓ ~ Variable

~ = partial or limited. Pricing and features verified May 2026. Always request a tailored quote for exact costs.

Works on every device

GoYap — one system, every device

Unlike BT One Phone replacements that focus on just one device type, GoYap gives every user the same business number and features regardless of how they work.

📱

Mobile app

iOS and Android. Business number, hunt groups and call recording on your existing smartphone — no SIM swap needed.

💻

Desktop softphone

Windows, Mac and Linux. Full business phone system on your laptop or PC — ideal for home workers and remote teams.

☎️

Desk phone

IP handsets for office-based staff. Same system, same number as your mobile team — no separate phone system required.

Why GoYap beats BT One Phone

BT One Phone required a BT SIM and BT infrastructure. GoYap works on any device, any network, any location — office, home or field. At £9.95/user/month on a 12-month term, it costs less than BT One Phone did and does more.

Free quotes

Get your BT One Phone replacement quote

Tell us about your team and we'll send you tailored quotes. No obligation, no sales pressure — just clear pricing so you can make the right choice.

We will send you up to 5 tailored quotes. No obligation. By submitting you agree to be contacted about your enquiry.

📄
Free download: PSTN Switch-Off 2027 — Complete Migration Guide
Covers all migration options including BT One Phone replacements · 11-page PDF
Download free PDF →
Common questions

BT One Phone replacement — questions answered

BT One Phone was switched off in March 2026. The main replacements are GoYap (app-based, from £9.95/user/month), PiPcall Mobile+ (SIM-based, BT's recommended successor), ONSIM (SIM/eSIM on EE network) and BT Cloud Voice (desk-based, requires 60-month contract). GoYap is the most flexible option as it covers mobile, desktop and desk phone on a 12-month term.
Yes. All the main BT One Phone replacements support number porting at no additional charge. Your existing business numbers — geographic (01, 02), non-geographic (03, 08) and mobile — can be transferred to your new provider. The process typically takes 5 to 15 working days. BT's withdrawal of One Phone does not affect your right to port numbers.
GoYap delivers the same core outcome — a business phone system that works on mobile — but through an app rather than a SIM. This means you do not need a SIM swap and can use your existing mobile contract. GoYap also adds desktop softphone support for Windows, Mac and Linux, and IP desk phone support, making it a more complete system than BT One Phone was.
PiPcall Mobile+ routes calls through a SIM or eSIM over the mobile voice network — calls are made through your phone's native dialler without an app. GoYap is app-based and also supports desktop and desk phones. PiPcall suits businesses whose staff dislike apps or need calls to work in areas with poor data coverage. GoYap suits businesses that want one system covering all device types at a lower price point.
Most businesses can be set up and making calls within 1 to 3 working days. Number porting takes 5 to 15 working days but your new system can be live with temporary numbers in the meantime. Your old BT One Phone numbers remain accessible during the porting window.
BT's withdrawal of One Phone effectively supersedes most contract end dates. Many businesses are not being charged early exit fees because BT is ending the service, not the customer. Check your contract terms with BT directly, but in most cases the switch is being treated as a service termination rather than a customer cancellation.

Ready to replace BT One Phone?

Get up to 5 free quotes — we compare GoYap, PiPcall, ONSIM and more to find the best fit for your team.

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