How to reflash stock sprint ROM?

[akates]

I'm been flashing a few of OMJ's ROMs and I've found that my phone has a problem nobody else's seems to have in that a good deal of calls don't ring on my phone and go straight to voicemail. I don't mean that it flashes and I just don't hear the ring as I've fixed that issue, there is no indication at all that there is a call and there is no missed call in the call log. I can't seem to figure this out and I'm going to bring my phone in to Sprint for a hardware exchange. When I download the sprint ROM it has a Sprint_Stock.nbh file but not a RUU_Signed.nbh file. How do I go about flashing to this Sprint_Stock.nbh file?

Thanks