ix method as i tried:
1. Go to settings
2. Application Manager
3. You will see 3 tabs Downloaded - Running - All
4. The Messaging which is in disabled mode was listed in the bottom & it was not showing in alphabetic order (therefore we may assume that the app has
disappeared) Now click to the app & set to enable & restart (better) the phone , Now you will find the "Messaging " listed in Apps, therefore you can drag & move the app to required screen (desktop).