yea....if you have verizon, and log into my account (which is free) you can do an ESN swap when ever you want online...so you keep an old ohone at the office or car....if you forget your phone at home simply log in, type in the ESN number located on the back of the phone under the battery and reset the phone...viola! the old phone now rings your number! when you get home that night just switch it back! all free!