Open the Messages app
Tap the New Message icon
Enter multiple contacts in the To field
Type your message
Tap the Send button
To name the group, tap the group icons at the top
Tap Info
Tap Change Name and Photo
Enter a group name
Tap Done
Open the Messages app
Tap the New Message icon
Enter multiple contacts in the To field
Type your message
Tap the Send button
To name the group, tap the group icons at the top
Tap Info
Tap Change Name and Photo
Enter a group name
Tap Done