Create a group to combine contacts that you typically contact together. You will be able to select the group as you would a contact for text messaging. Note that a group might have a limit on how many contacts can be added depending on the device.
1.
From the Contacts app main screen, tap Groups.
2.
Tap the Plus sign icon.
3.
Enter a group name.
4.
Tap Add members.
5.
Select a contact.
6.
Tap Add.
To add more contacts to the group, repeat steps 4-6.