In Teams for your personal life, you can start a one-to-one chat with SMS participants in Brazil, Canada, Colombia, Great Britain, India, Mexico, and the United States. SMS participants from other countries will receive an invite to join Teams; once they join, you can start a chat with them.
To start a chat with an SMS participant:
Select New chat .
Enter the SMS participant's phone number in the To: field, then select the phone number in the results.
Enter a name in the Add contact name field (Type a name on Desktop) and select Add (Add Name on Desktop).
Tip: The SMS participant will not see the name you assigned them; it is only for your reference, so you know with whom you're chatting.
Send a message to finish creating your one-to-one chat. The SMS participant you invited will receive an SMS from Microsoft starting the chat. The SMS will also contain links for the SMS participant to join Teams via the app and learn more about Teams.