Step 1: Download
1.Application: For android: Go to market and download Better Cracked Screen
Check for other apps for other phones
2.Wallpaper: For iphone:
link 1 http://forums.macrumors.com/attachment.php?s=3970dfb3b493c8cc3f7e3c6c6c289d08&attachmentid=149410&stc=1&d=1229891183
Connect your iPod to your computer as you normally would with the USB cable.
Open iTunes if you don't have it open on your computer already. You will be able to access photo options from here.
Choose "Preferences" from the iTunes menu. This will pop up a tab where you will be able to complete step 4.
Click on the iPod tab in the screen that will open up after completing step 3.
Select the "Photos" tab in the "iPod" pane you chose in step 4.
Choose the "Synchronize Photos From" checkbox and select either "iPhoto," "Choose Folder" or "Pictures" (as in your pictures folder) from the pop-up menu.
For android/iphone and other phones:
link 2 http://3.iphonewallpaperclub.com/wp-content/uploads/2010/11/Cracked-Screen-iPhone-Wallpaper-Download.jpg&t=cfcdc3488ceecfa7c09a28979302b1fd
Copy link and paste it
You can choose your own ones in google :P
3. If its a wallpaper then save it on your phone(make sure you use the right resolution).
Step 2: Using It!!
5. The best way for it to look real is to view the "cracked screen wallpaper" through the gallery so thatthe icons dont ruin the prank!!!
For the app just test it out before you give it a try on your friends an your confident it will work. I reccomend to turn off vibrate for better effect
6. Enjoy the shock of your friends, colleges and even your teachers!!!