Cannot Register on Selected network issue

[slickjestap]

Ok I have a question and I have seen a few fixes but none that have worked for me.
I have paid for the unlock and the patched radio,(Sprint) and it shows ATT Tmobile and CBW Cincinnati bell in my manual selection settings in the GSM only area. When I try and connect it says "Cannot register on selected network.Choose another network,or disconnect your data connection and try again." I have tried flashing a different patched radio,a different rom,stock rom, hard and soft resetting multiple times,and no there is no data connection active and is not connected to activesync. I also tried in various locations that I know have good signal for each carrier.
Anyone have this happen,or am I misreading that the SIM unlock will let us use GSM when CDMA networks are not available?