It should be noted that the Messenger feature is NOT available when you are offline.
- You can create a group, and you can send messages to both groups and an individual. However, the messages will appear in an "undelivered" status while offline. Once the app is online, the status of the message will change to delivered. You will know it's been delivered because a "double tick" will appear over your message conversation!
- When you're offline, all of the existing conversation in messages previously sent should appear!