Call someone from another number or probably with their own number and surprise them. This is one the best prank you could play on an April Fool's day. Here I will explain a simple method you can use to trick your friends...
When you talk about calling someone from some fake number, its called Caller ID Spoofing. There are several sites that allow doing this and its legal in most places till your intentions are innocent.
Many of you may know this and many would have used it to play pranks. For those who don't, here is a small prank I would like to discuss. You can play it on your friends and capture their expression.
From the number of sites around, I would select Mobivox mainly because:
1) I've tried it myself
2) It works for everyone including Indian audience
3) Registration is free and you get 10 minutes of free calling
With all these features, it also allows keeping the caller's number and calling number same. This can be used to play the trick.
Now lets call someone with their own number. :)
> Visit Mobivox
> Click on Register for Free
> On the next screen, fill all required details
> Note: In the Phone number field, you will insert the Victims mobile number.
> Once the registration is done, confirm your email address.
> Login to your account
> Your account header will show enough fund for a 10min call.
> Click on Direct WebCall
> Enter your Victim's number you wish to call.....and freak him out :)