Samsung Galaxy Alpha - Manual (Page 69)

Phone
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Making calls from call logs or contacts list
Tap Logs or Contacts, and then drag a contact or a phone number to the right to make a call.
To deactivate the call by dragging an icon to the right feature, tap
→ Settings → Contacts,
and then deselect Swipe to call or send msg.
Making calls from the favourites list
You can easily call contacts that you communicate with frequently by adding them to the
favourite contacts list.
To add contacts to the favourites list, tap Contacts, select a contact, and then tap .
To make a call to a favourite contact, tap Favourites and select a contact.