rick, it depends upon whether your cell phone company has your phone defaulted to hide or reveal its number.  *82 reverses whatever the default is.

Try calling another number you have that has caller ID and see if your calling phone's number is displayed on the incoming phone. If it isn't, you'll need to *82 to turn off the caller ID blocking. Providers want to know who they are talking to.

See the link (about 1/2 way down page)