Setting up Diamond on Cricket

[Nosey]

I have seen posts where people have been able to set their diamond up on cricket, I currently use alltel prepaid but don't have any data plan (they don't offer one for prepaid)

I have read all the posts and believe I have everything all set to flash and connect

my question is, I called cricket to get an account, they said I can bring my own phone but they had no way to setup an account without me purchasing one of their phones and setting up the account online, then I can change to my own phone

has anyone setup an account without purchasing a phone of theirs? the least expensive phone I have found is $30

Thanks in advance for any help you can give