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 14-day free trial (1 user, 1 UK number, 30 minutes) with no card required. Paid plans start at £4.75 per LINE per month — not per user — with no contract.

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 every plan, typically within 24 hours.

Can I keep my existing phone number?

Yes — Silux Call offers free UK number porting on every plan, 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.

No card to start

Free with Silux Call

Silux Call has a 14-day free trial (1 user, 1 UK number, 30 outbound minutes a month, no card) plus a 14-day free trial of any paid plan. Here is everything you can get at £0 — from a free virtual number and a free landline number to free voice services, free call forwarding, free voicemail and a free PSTN switch-off audit. UK-hosted, GBP-only, no contract.

Start free — no card See pricing

Free VoIP trial
Silux Call’s free VoIP trial lets a UK business test the full hosted phone system — UK number, app, IVR, voicemail and AI features — at £0, with no card required, no contract and no obligation to continue. At 30 days it is one of the longest no-card trials in UK business VoIP (most rivals offer 7–14 days or none), and signup takes about 60 seconds.
Free virtual phone number
A free virtual phone number from Silux Call is a real UK number that rings on an app or any device with no copper line and no monthly fee during the 14-day trial — geographic (020, 0161…), 03 or, on a paid plan, 0800.
Free landline number
A free landline number from Silux Call is a UK geographic number (a virtual landline) delivered over the internet at £0 during the 14-day trial — it behaves like a traditional landline but needs no phone line, line rental or hardware.
Free voice services
Free voice services from Silux Call are a complete set of cloud telephony features — calling, voicemail, call routing and an app — provided at £0 for 14 days, with UK-domestic, GBP-only billing if you ever upgrade.
Free 0800 number trial
You can get an 0800 freephone number free for 30 days on a Silux Call paid-plan trial, then keep it from £1/month — it is a non-geographic UK number that is free for your customers to call.
Free business phone number
A free business phone number from Silux Call gives a company a professional UK number — separate from any personal mobile — at £0/month on the free seat, ringing on an app on every device.
Free second phone number
A free second phone number from Silux Call adds a separate UK business line to your existing smartphone at £0/month on the free seat — work calls stay separate from your personal number, on one device.
Free virtual landline
A free virtual landline from Silux Call is a UK geographic number that works over the internet instead of a copper line, free on the free seat, ringing on an app, desk phone or mobile from anywhere.
Free UK phone number
A free UK phone number from Silux Call is a genuine UK DDI — geographic or 03 — provisioned instantly at £0/month on the free seat, usable on any device with no line rental.
Free VoIP for business
Free VoIP from Silux Call is internet-based business calling at £0 on the permanently free seat — a UK number, softphone apps, voicemail and call routing, billed GBP-only if you ever scale up.
Free call forwarding number
Free call forwarding from Silux Call automatically diverts your UK number to your mobile, a colleague or voicemail at no extra charge, included on every plan and on the free seat.
Free voicemail & voicemail-to-email
Free voicemail from Silux Call delivers every message as an audio file and a written transcript to your inbox, included at no cost on every plan, including the free seat.
Free AI receptionist trial
Silux Call offers a free 30-day trial of its AI receptionist — software that answers your business phone in your brand voice, books appointments and routes calls 24/7 — with no card to start.
Free softphone app
The Silux Call softphone is a free app for iOS, Android, Windows, macOS, Linux and the browser that turns any device into a full business phone, free to download and free to use on the free seat.
Free UK number porting
Silux Call ports your existing UK landline (via STAC) or mobile (via PAC) number for free on the Plus plan and above, typically completing within 24 hours with no loss of calls.
Free PSTN switch-off audit
The free PSTN switch-off audit from Silux Call maps every analogue line, ISDN circuit and ancillary device (lifts, alarms, EPOS) on your site and returns a one-page WLR2 migration plan ahead of the 31 January 2027 cut-over, at no charge.
Free local phone number
A free local number from Silux Call is a UK area-code DDI — an 020 London, 0161 Manchester, 0121 Birmingham or any other local number — provisioned instantly at £0/month on the free seat.
Free phone system for small business
Silux Call’s free phone system for small business is a complete hosted PBX — number, apps, IVR greeting, voicemail and call routing — at £0/month on the free seat, with no hardware to buy.
Free conference calling
Free conference calling from Silux Call lets you host multi-party audio calls from the app at no extra charge, included on the platform alongside your free seat.
Free SIP account trial
Silux Call provides free SIP credentials on a trial so you can register a softphone, IP desk phone or 3CX/FreePBX PBX and test UK calling before committing to a SIP trunk plan.
Free WhatsApp business number trial
On a Silux Call paid-plan free trial you get a UK number wired to a shared WhatsApp Business and SMS inbox alongside voice, so customers reach you on their preferred channel — free for 30 days, no card.
Free call recording trial
Silux Call’s free 30-day trial includes GDPR-compliant call recording with consent prompts, encryption at rest and a one-click compliance report — free to test, no card required.
Free toll-free (0800) number trial
You can trial a UK toll-free (0800/0808) number free for 30 days with Silux Call — a number that is free for your customers to dial — then keep it from £1/month with no contract.
Free click-to-call number for your website
Silux Call gives you a free UK number and click-to-call set-up for your website on the free seat, so visitors can call or request a callback straight from a button, with call-tracking on paid plans.

Free FAQs

What can I get free from Silux Call?

A 14-day free trial (1 user, one UK landline allocated at random, 30 outbound minutes, no card), free voicemail-to-email, free call forwarding, free UK number porting on every plan, and a free PSTN switch-off audit with every account.

Is there a free VoIP plan with no card?

You can start without a card: every account begins with a 14-day free trial, which includes a UK landline allocated at random. It is time-limited — after 14 days the line is disconnected automatically unless you order a plan. There is no free for 14 days plan, and one trial per customer.

Can I get a free UK phone number?

Yes. The free trial includes one free UK number — geographic (020, 0161, 0121…) or 03 — provisioned instantly, with free voicemail-to-email and call divert.

Is the free number a real landline?

It is a virtual landline: a real UK geographic number delivered over the internet, so it works like a landline on any device but needs no copper line or line rental, and it already survives the 2027 PSTN switch-off.