Hide ur Phone number while calling

Most of you want to call someone while hiding your own phone number identity..??
so i am publishing the trick for hiding your phone number while calling.
If you want to hide your phone number when calling, put one of these codes in front of the number that you are going to call.
*#30# , *31#
eg. *#330#9855812345
If u want to show the number then add any of the following code in front of number u r calling to:
*#31# , #31#
Note : Trick may work depending upon ur operator!!!!!