how to remove my number from old go phoe
I have a new calypso go phone. It was activated at an AT&T store. I have the same number as my old flip phone (LG B470). I would like to turn in my old flip phone and have removed all information on it. But I cannot remove my number from it. Don't want someone else to have my number or see it.
How can I remove my number before I turn it in to recycle.