Flashed Sprint iPhone 4 To Cricket?

I have a flashed sprint iPhone 4 to cricket and I went with my mom to the cricket store to get it activated and they said the couldn't or their store would get shut down. I heard that I can go to an authorized dealer to get it turned on and not a corporate store (Cricket Store) is that true because I LOVE this phone and I would like to use it on Cricket. Can someone please inform me!

Can't happen

As the iPhone you have is not listed as part of Cricket's inventory, you can't take it over to them. Cricket, Virgin, and most other CDMA carriers that have the iPhone do not allow outside iPhones on their network as a method to prevent phone trafficking of stolen models.

As your phone's serial number is not in their system, they can't tell if the phone is paid for or stolen for that matter.

If you want to use an iPhone on Cricket, you will need to buy one from Cricket. That is their rules, and if you do not care for them, you can go elsewhere.

Yes you can have them flashed to a cricket phone I just did my daughters