Virtual number is a communication service for small and large companies. To use virtual UK mobile number https://freezvon.com/virtual-number/united-kingdom-mobile/ , you do not need to buy SIM cards or install physical telephone exchanges in the office. A virtual PBX is formed by the provider: it creates and maintains servers, organizes data transfer and offers a ready-made solution - numbers and services for doing business. To receive and make calls, in the simplest case, it is enough to have mobile phones.