Locking default application:

Want to Lock default application?
Don't want everybody read your SMS?
Then just Lock Messaging Application, here is the way....

1. Open 3rd Party Application like Fexlporer, x-plore.
2. Go to Z/System/Apps/mce
3. Mark two files of mce.aif and mce.app
4. Press Option -> Edit -> Copy
5. Then go into X/System/Apps/ (X stands for either C or E)
6. Create a folder with name "Locked"
7. Paste the two files in that folder
8. Rename mce.aif into Locked.aif
9. And mce.app to Locked.app
10. After that, wait for 5 seconds and then try to open messaging application.
11. You should see the Messaging can't be opened.