I've tried flashing some more things to the phone thinking that the Radio is corrupt or something, but nothing works.
- Sprint Radio 1.96WV
- Sprint Stock ROM again
I wonder if the phone requires CDMA signal somehow when it is reflashed with radio or something to initialize some parameters however here there is no CDMA, only GSM. I've rebooted the phone here and it came back up normally, but after the soft-reset from Advanced Settings app it got screwed completely.