How to Group Messages on an iPhone 4
The iPhone 4 features a new group text messaging feature. This feature allows you to send a single text message to multiple contacts. You can send the group message to up to 100 recipients, and your cellular service provider will bill the group text message as a single text message. To send a group message on your iPhone 4, you will need to activate the Group Messaging feature.
Tap the "Settings" icon on your iPhone 4.
Tap the "Messages" option.
Slide the indicator next to "Group Messaging" to the "ON" position.
Tap the Home button on your iPhone.
Tap the "Messages" icon.
Tap the New icon to create a group text message. Press the "+" icon and select individuals you would like to send the group message to. Enter the group text message and tap the "Send" button to send the text message to individuals within the group.