SpoofCard can be accessible from its iOS app, Android app, or from their website, at SpoofCard.com.
What does SpoofCard do? You can spoof your caller ID, while making your voice sound either male or female. In addition, you can make it sound like you are somewhere else, like at a nightclub or party, or make a group spoof call. Unfortunately, you can’t do all at the same time.
I know this post was a little late, considering yesterday was April Fool’s Day, but whatever, this might give you an idea of what to do next year.
Android App(Different name- same company): http://play.google.com/store/apps/details?id=com.phone.gangster
Note: You cannot use the app in an unlawful way. Read more: http://www.spoofcard.com/blog/2011/01/06/an-update-on-s-30-the-truth-in-caller-id-act-of-2009/