As we reported previously, users who switch away from the iPhone are having trouble with their phone numbers remaining tied to iMessage, causing them to miss SMS text messages from other iPhone users. Apple told Re/code that it has fixed a server-side bug that was partially responsible for the issue and that it is working on a software update to address the issue more fully. follow link
Enter Dashboard, Expose, or Spaces Temporarily
Hold down F9, F10, F11, or F12 (or whatever you've set for the Expose and Spaces keyboard shortcuts) for a few seconds, and then release the key to enter and leave the appropriate mode without having to press the key again. This is particularly useful for Dashboard, in which you can check the contents of a widget and then return to your work with only a single key press.
Visit plucky tree
Apple Working on a Fix for the iMessage Trap