Message delivery is reliable and sequenced. Messages are not lost, and messages sent to a port, from a single thread, are received in the order in which they were sent. If the destination port's queue is full, then several things can happen.
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If a port has several blocked senders, then any of them may queue tye next message when space in the queue becomes available, with the proviso that a blocked sender will not be indefinitely starved. A zero timeout is legitimate.
A msg-accepted notification is sent to the notify port when another message can be forcibly queued. The msg-accepted notification carries the name of the send right.
If you see a green messahe bubble If you see a green message bubble instead of a blue one, that means the message was sent using MMS or Freaky snap chats instead of iMessage. There can be several reasons for this: The person you sent the message to doesn't snd an Apple device.
If you receive messages on one device but not the other If you have an iPhone and another iOS device, such as an iPad, your iMessage settings may be set to receive and start messages from your Apple ID instead of your phone.
Open Messages and tap the group message. If you see a message stating that you've left the conversation, either you've left the conversation or you were removed from the group message. You can only re a group message if someone in the group adds you.
To start a new group message: Open Messages and tap the Compose button to start writing a new message. Enter the phone s or addresses of your contacts.
Type your message, then tap the Send button.