i just flashed to rcmixhd runny v.4 .. which radio version should i flash to? (how do we know which radio for which rom? )

RIL? is it the same as radio? long time didnt flash.. im outdated..

yo guys, im surprised still gt discussion here early in the morning.
i gt problem regarding my calling thingy. i cant hear anything when i try to call someone or when i answer a call. no voice heard from both party. i need to put on my ext speaker to be able to hear. it happened when i was listening to music and earphone plugged into my DHD. then, someone called, i answered and plugged out my earphone.
eversince that this problem appeared and i did try troubleshoot by reversing the process how it happened. it worked once. now it happens for 2nd time. anyone have ideas? i did ask Prof google but cant find solution.

yo guys, how to flash back to normal rom? where to get the file??