Free second phone number for UK businesses
A free second phone number from Silux Call adds a separate UK business line to your existing smartphone at £0 during the 14-day free trial — work calls stay separate from your personal number, on one device.
What you get free
How the free offer works
The 14-day trial covers one line with 30 outbound minutes; after that it is £4.75 per user a month on Entry and extra numbers are £5.99/month.
Also searched as
UK buyers look for this under many names — Silux Call covers all of them: free second phone number, free second number for business, free second line, second phone number free uk, free 2nd number app, free business line on my phone.
FAQs — Free second phone number
Is free second phone number really free?
A free second phone number from Silux Call adds a separate UK business line to your existing smartphone at £0 during the 14-day free trial — work calls stay separate from your personal number, on one device. The 14-day trial covers one line with 30 outbound minutes; after that it is £4.75 per user a month on Entry and extra numbers are £5.99/month.
What do I get for free?
A second UK number on your existing phone, free; Separate work voicemail and business-hours rules; No second SIM or second handset needed; Free call forwarding and do-not-disturb scheduling; Caller sees your business number, not your mobile.
Do I need a credit card to start?
No. You can start the Silux Call free trial and free trials without a card. You only add payment details if you choose to upgrade to a paid plan.
Is it ready for the 2027 PSTN switch-off?
Yes. Silux Call runs entirely over IP, so it is unaffected by the 31 January 2027 PSTN switch-off — and every account includes a free WLR2 migration audit.
Get a free number in your city
Free for your industry
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