Each country or region has different descriptions, different types of phone numbers (geographic/non-geographic and service (toll/toll-free)), and rules/regulations for getting phone numbers that can be used in Microsoft Teams. You can refer to this document to select the country where you want to get your numbers. You'll find information about availability, and the downloadable PDF LOA forms you'll need for porting numbers.
Reference documentation: https://learn.microsoft.com/en-us/microsoftteams/manage-phone-numbers
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