Crazy Call is the ultimate tool for making prank calls and fooling your friends.
You can change your CallerID, so when you call someone he sees on his Caller ID display the number you selected.You can also change the pitch of your voice for deep and creepy or high and funny.
To use the app, your phone will dial to an International or premium rate number. The call rate vary depending on your carriers charges.
You can check the rates and use the app from any phone at Click Here
The app is not working in the USA because of the Truth in Caller ID Act.
Download its application for Android Download 1.2 : Official