If you have no service days left your, Tracfone will be deactivated. You can buy minutes for the phone and add them and by doing this it will add service days to you phone. It is best however to call Trackfone before you do this that way if you run into any problems they will be on the telephone to troubleshoot. Tracphone is a telephone service for people who do not want the hassles of a contract. I know, I have one.