4Basic Call FeaturesTo add a Skype for Business contact:1. Tap the desired contact from the search results.2. Tap Add to SFB.3. Tap the desired group.To add a contact to the Favorites groupWhen you add contacts to the Favorites group, those favorites display on the Favorites screen too. Bydefault, local favorites are displayed before the Skype for Business favorites. Local favorites are indicated bythe icon . Skype for Business favorites are indicated by the presence status icon.To view a contact’s information:1. Tap Contacts.2. Tap the desired group.3. Tap the desired contact to view the detailed information.To call contacts from the directory:1. Tap Contacts.2. Tap the desired group.3. Tap the desired contact to view the detailed information.4. Tap .To place a call:1. Do one of the following:- Pick up the handset.- Press .- Press .2. Enter the number and then tap .To answer a call:1. Do one of the following:- Pick up the handset. The call is answered in handset mode.- Press . The call is answered in hands-free (speakerphone) mode.- Press . The call is answered in headset mode.To end a call:1. Do one of the following:- If you are using the handset, hang up the handset or tap .- If you are using the speakerphone, press or tap .- If you are using the headset, tap .To redial a call:1. Press when the phone is idle to dial out the last dialed number.To mute or un-mute a call:1. Press to mute the microphone or press it again to un-mute the microphone during a call.