first, i used the search button but had no luck to find a solution for my problem .
I have a BlueSparks v5 ROM installed but wanted to try trip's latest MIUI ROM (v1.0), so i flashed it at my .54 baseband but had no radio. so i flashed the .49 bb (from here) and the flashed the rom again but this time i had "Unknown baseband) in the info section beside the radio problem.
so i figured out that i better flash the whole 2.0.2.A.0.24 FW (from here) to have the bb problem corrected, but again im having the same.
at last i restored my backed up ROM till i get this problem solved, so any ideas guys?