Learn how to use contacts group on your Nokia Lumia 928. When you have created contact groups, you can send a message to several people at the same time. For example, you can assign the members of your family to one group and reach them more easily with a single message.
On the start screen, tap People, and swipe to together.
Tap + Add icon > Group.
Write a name for the group, and tap Save icon.
Tap + Add icon and a contact, and tap Save icon.
Tap the group name.
Tap . . . > rename, and enter the new name.
Tap Save icon.
Touch and hold the group name.
Tap members and the contact, and then remove from group.