To setup your phone and service for cricket follow the steps below. You will obviously have to specify this way if you are setting up absolute new service you can go through the prompts the other way if you are changing a phone out etc on an existing account

1) Get your ESN number #4357* send button (green button) write down ESN number
2) Call cricket new service 24 hour line 1-800-975-3708 opt 2
3) After setting up the new service and giving the rep your ESN number you must ask
the rep for you MIN number. They should provide you with your mobile directory
number or actual phone number. Sometimes the MIN number is the same, but often
times it can be different from your phone number.
4) Be sure to write down your phone number and MIN number
5) On the phone press ##000000 and send button this will bring up NAM programming
menu
6) Under mobile directory number input your phone number and under imsi input the
MIN number press the center button on phone and save the phone may reboot
7) After phone has reboot press *228 to update the preferred roaming list file via
Cricket network
8) You should now be ready to use your phone