If the phone can't read the radio nvm (as in the case of a dead radio) then you may find it difficult or impossible to update the ROM because that's where the rom update utility verifies your carrier ID. You can try extracting the latest official sprint update and flashing it (or just the nk.nbf which is the main ROM) using the noid flash tools, but I think that may still not work (but worth a try). Worst comes to worst we may be able to use mtty to erase everything so your phone won't even boot up. If you want to do that then come by the chatroom (click Chat at the top of the page) and someone there can walk you through it.
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