Hi Guys,
I have not seen any notable change after flashing the new ROM, but certainly it has not degraded my reception quality. Its too early to say if my original issue is fixed with this RADIO, until somebody complains saying I didn't picked their call.
I am not sure weather flashing radio on GENE is safe, I took my chance as I have two GENE's, and I was ready to sacrifice one of then

On device's after kaiser, security can be unlocked, which allow them to flash any radio, even from other devices, and if something goes wrong they can roll back. But such a unlock is not available for GENE
On how to flash the RADIO, just download the .nbh file posted by vaibhav, and flash it as you normally flash any other ROM using the rom update utility.