A sent message leaves your phone but stays in the service providers server until the other phone signal it catches. When it catches the other phone the message reaches the other phone and will be...
Mailbox is similar to a queue, which allows only atomic operations. They can be bounded/unbounded. Get/put task is used to suspend abounded mailbox. That?s why mailbox is used more for communication...
iMessaging is only available for iOS 5 devices (iPod Touch 3g/4g, All iPads, and iPhone 3Gs 4 and 4S. You can only send these over wi-fi and to other people with iMessage. If you want a cell phone,...
Both email an instant messages are sent over the internet using electronic devices; the difference is that the text of the instant message will appear on the screen of the recipient as soon as it's...