07-03-2013 12:52 PM
Start by seeing if you accidentally hid it. While on your homescreen, press the menu key and select Show All or Unhide All, whichever one is available. If your icon is hidden, this will expose it.
If that doesn't uncover its whereabouts, you can reinstall it using BlackBerry Desktop Software. Plug your phone in to your PC and open BDS. Once your phone has been recognized, click Applications on the left. (I'm not sure if this method will work, it's been a long time since I've used BDS. If not, proceed to my next suggestion below.) Once in Applications, look for your text messages entry. If it has an 'X' beside it, click to change it to a check mark. If you can't do that, you'll need to reload your OS.
To reload your OS, open BDS as instructed above but then click Device at the top of the software then click Restore. Choose the most recent restore point and load it to your phone.
Let us know if that helps you.
07-03-2013 04:37 PM