VoIP phone service, explained simply.

VoIP (Voice over Internet Protocol) sends your phone calls over the internet instead of copper phone lines. You can use a desk phone, a cordless phone with an adapter, an app on your mobile or your computer. Read what VoIP is and how it works.

Most homes and offices are. Each call needs only about 100 kbps each way, but steady latency and low jitter matter more than raw speed. Run our free VoIP speed test to see how many calls your connection can carry.

Usually, yes. VoIP plans often bundle unlimited calling in your country plus features that landlines charge extra for. Use our VoIP cost calculator with your own numbers, and check current pricing with providers.

It depends on your team size, the apps you use and whether you need video meetings or a contact centre. Our guide to the best VoIP for small business compares the well-known providers feature by feature.

In most cases, yes. Moving a number between providers is called porting. Your new provider requests it for you; keep your old service active until the port completes.