Cricket is a contract-free cellular carrier that essentially buys time on the Verizon towers and sells it to cellular customers on a "pay as you go" plan. They're a lot cheaper but getting a top-end phone on their system is very difficult as you have to flash a custom rom and radios from Cricket to use it on their system. There are plenty of people who claim they can successfully flash a Cricket rom onto the RAZRs, but from my research in almost every case something doesn't work right, leaving the phone handicapped.
They do have some nice phones, including the HTC One V and the Huawei Ascend II, but if you want a RAZR, you have to root and flash.
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