| Conference Calls | 22Blocking Calls with No Caller IDBefore you beginMake sure you are in Personal account mode.Procedure1. Navigate to > Settings > Calls.2. Turn on Block calls with no caller ID.Related tasksSigning into Your Phone in Personal ModeAnonymous CallYou can hide your phone number when dialing people who are outside of Microsoft Teams.Before you beginMake sure you are in Personal account mode.Procedure1. Navigate to > Settings > Calls.2. Turn on Hide your phone number when dialing people who are outside of Microsoft Teams.Related tasksSigning into Your Phone in Personal ModeConference CallsThis chapter provides basic operating instructions about initiating and managing a conference call.• Initiating a Conference by Calling Multiple Contacts• Initiating a Conference Call by Inviting Other Contacts• Initiating a Conference Call From Call History• Managing the Conference Participants• Adding Participants to a Conference Call• Leaving the ConferenceInitiating a Conference by Calling Multiple ContactsProcedure1. Tap from the Calls screen.2. Enter the contact information to search and then select the desired contact.You can add multiple contacts.3.Tap at the top-left corner of the touch screen.