To enable group messaging (on any iPhone with iOS 4), launch the Settings app, then tap Messages. Finally, set the Group Messaging slider to On.
You may not notice an immediate change. Indeed, this is not a particularly well-documented feature, which is why ZDNet's Jason O'Grady went so far as to call Apple and AT&T for clarification. Here's what he found out:
- The Group Messaging setting controls whether or not the complete address list is sent to each recipient in the group.
- When set to OFF each recipient only sees you and their name in the thread, but when set to ON things change depending on the recipient's settings.
- If the recipient has Group Messaging turned ON then all recipients are shown on that person's phone.
- When a recipient of the message responds it is automatically sent to all members of the original thread.
- All messages within the group are placed into a single thread, with each message identified with the sender's name.
Oh, and if you're tired of Android-carrying co-workers bragging about their phones, make sure to mention that Android doesn't do group messaging -- as this video explains:
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