I use my android phone for both private calls and calls to customers, sometimes when calling customers you just don’t want them to know your number.
In android changing your caller ID is just a few clicks to far away, and until today no application is available for creating a shortcut on your homescreen to change this setting.
This is where prefixer comes in and saves my day!
Prefixer is a FREE and great application which allows you to prefix any outgoing call with a code, for my operator the code to make 1 call hide my phone number is #31#, so creating a rule which sets the prefix for any outgoing call to #31# and adding the prefixer widget to my homescreen for turning it off and on really helps me alot!
Check out prefixer :-)