When does the UK PSTN switch off?

BT Openreach is retiring the UK PSTN (WLR 2) on 31 January 2027. Every UK business landline must move to a digital service such as VoIP or full-fibre voice before that date.

What is the cheapest UK business VoIP?

Silux Call offers a free seat tier (1 user, 1 UK DDI, 30 minutes/month) and Pay-as-you-go from £0/month + £0.02 per UK landline minute, with no contract. Paid plans start at £6.95/user/month and come with a 30-day free trial.

Does Silux Call have a free trial, and do I need a credit card?

Yes. Every paid plan comes with a 30-day free trial and no credit card is required to start — most UK rivals offer only a 7 or 14-day trial, and several require a card up front. You can also stay on a permanently free seat with no card at all. Signing up takes about 60 seconds.

How quickly can I get a UK virtual landline number?

You can sign up in about 60 seconds and choose a UK virtual landline number (020, 0161, 03 or 0800) instantly — no engineer visit, no hardware and no contract. Existing numbers port across free on Plus and above, typically within 24 hours.

Can I keep my existing phone number?

Yes — Silux Call offers free UK number porting on Plus and above, typically completing in 24 hours. We support PAC and STAC porting workflows.

Does Silux Call work with Microsoft Teams?

Yes — Silux Call supports Microsoft Teams Direct Routing on the Pro tier, including a self-service onboarding wizard that issues the PowerShell snippet for your Teams admin.

Is Silux Call GDPR and HIPAA compliant?

Silux Call ships UK GDPR-compliant call recording with two-party consent flows, plus one-click HIPAA enrolment that locks 6-year retention, KMS-backed encryption, and PCI DTMF redaction. A one-click compliance report exports an auditor-ready PDF.

How does Silux Call block scam calls?

Silux Call screens every inbound call with an AI scam shield in under 0.5 seconds. Known HMRC, parcel, and account-spoof patterns are blocked before your phone rings — a feature no other UK business VoIP provider ships.

Best VoIP UK 2026: the complete buyer’s guide & ranked list

A ranked, honest buyer’s guide to UK business VoIP in 2026 — Silux Call, bOnline, Yay, Voipfone, Tamar, Gradwell, Sipcentric and other UK providers — with a plain-English pros/cons table.

This guide is being expanded. In the meantime, see our 19-vendor comparison or read about the UK PSTN switch-off.

UK PSTN switch-off 2027: what every small business must doguide
How to port your UK phone number to VoIP (PAC and STAC explained)guide
Silux Call vs bOnlinealternative
Silux Call vs Yay.comalternative
Silux Call for Estate agentsindustry
Silux Call for Legal practicesindustry
PSTN switch-off countdown 2027: what every UK SMB must do in the next 12 monthsblog
Pre-ring AI scam shield: why your UK business phone should drop scam calls before it ringsblog

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Best VoIP UK 2026: the complete buyer’s guide & ranked list

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