[xddy]

Sorry for my mistake, actually, I'm just using the ROM. You are absolutely right, it the problem with the radio. I just updated the 2.3.1 from 3.16.651.0 again, this time it works great, and I'm not asked to update the radio again, which might because the 3.16.651.0 has updated the radio already. Thanks you all. Now my brick becomes the cellphone.