What is a VoIP number?

A VoIP number is a business phone number that works over the internet rather than a traditional phone line, allowing calls to be made and received on any device from any location.

Can I use VoIP on my mobile?

Yes — most VoIP systems include a mobile app that lets you make and receive business calls on a smartphone over Wi-Fi, 4G or 5G, using your business number rather than your personal one.

Can VoIP work without an internet connection?

No — VoIP relies on an internet connection to carry calls. However, call forwarding, mobile apps and backup internet connections mean your business can stay reachable even during an outage.

How do I reduce VoIP latency?

To reduce VoIP latency, prioritise voice traffic with Quality of Service (QoS) on your router, use wired Ethernet instead of Wi-Fi, upgrade outdated networking hardware, and choose a provider with UK-based servers and low-latency routing. Aim for one-way latency under 150ms.

Why is my VoIP call quality poor and how do I fix it?

Poor VoIP call quality is almost always fixable. The four main causes are insufficient bandwidth, network congestion, misconfigured settings and inadequate hardware. Test for latency under 150ms, jitter under 30ms and zero packet loss, then enable QoS, use a wired connection and check your codec settings.

Does VoIP work during a power cut?

A power cut will stop on-site desk phones, but cloud-hosted VoIP calls can reroute instantly to mobiles the moment power drops. A UPS keeps your router running for roughly 20–60 minutes, and Ofcom expects providers to offer at least one hour of emergency call access during an outage.

Will VoIP replace my landline?

Yes — the UK's traditional copper phone network is being switched off on 31 January 2027. After that date, all businesses will need to move to VoIP or another internet-based system. Most businesses find VoIP offers more features and lower costs than a traditional landline.

What are the security risks of VoIP for businesses?

Common VoIP security risks include unauthorised access, eavesdropping, phishing, malware and denial-of-service attacks. These can be prevented with strong passwords, multi-factor authentication, encrypted voice traffic, secure firewalls and regular staff training.

What equipment do you need for VoIP?

To use VoIP you need a reliable internet connection, a VoIP service provider, and a compatible device — an IP desk phone, a softphone app on a computer, or a mobile app on a smartphone. Many businesses can use existing handsets with an adapter.

Case Studies

See how UK businesses across every sector have cut costs, improved call handling, and future-proofed their communications with The VoIP Shop.

500+

Businesses migrated

15+

Years of VoIP expertise

Jan 2027

PSTN switch-off deadline

All Case Studies

Estates

Berkley Estates: One System, Three Offices

Berkley Estates unified multi-site communications with a single, cost-efficient cloud phone system, delivering smart call routing, branded call flows, and seamless connectivity.

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Education

The Mountbatten School Goes Cloud

The Mountbatten School replaced its legacy phone system with a modern communications platform, providing Teams integration, reliable connectivity, and automated absence handling.

Read Full Case Study

Healthcare

Dental Tech: Five Sites, One Platform

A leading Irish dental technology provider connected four clinics and a laboratory facility with a fully managed Yeastar deployment, achieving seamless connectivity with zero downtime.

Read Full Case Study

Software

Eazi Apps: Smarter Calls, Lower Costs

Eazi Apps improved business communications with a flexible cloud phone solution, delivering reliable connectivity, streamlined call handling, and a better experience across the business.