Real-time voice or video communication between users on mobile devices or computers
Hello
Teams has calling plan options, but it is for business users only, meaning you need to get a business tier license, create a separate account for this license. Then you will need to get the Teams phone with calling plan add on.
The business tier license options are here:
https://www.microsoft.com/en-us/microsoft-teams/compare-microsoft-teams-business-options
The add on Teams phone/calling plan options: https://www.microsoft.com/en-us/microsoft-teams/compare-microsoft-teams-business-options#plans-and-pricing_tab1