Currently, there are two ways to build a virtual call center. One is that a business purchases virtual call center software from a service provider, installs and uses it as a standalone software, not affiliated with the system. The second is connecting API directly to the system, virtual call center will be integrated with full features: incoming and outgoing calls for customers from web / app, storing call history, reporting and call statistics. ... It can be clearly seen that, with the first way, businesses must use a lot of software to call customers, having to download data from the virtual call center software and update it onto the system to easily lead to false customer information.