Today i found my car jack that i thought lost long long ago. It actually on kanan side near poket. I face palmed myself.:35/s; I still can't find the car antenna though!
I am using Pioneer headunit and the radio reception is clear. Last time I tried Sony, but not as clear - perhaps different brand has different signal strength reception. One shop told me Pioneer and Alpine are better brand when it comes to this. But haven't tried Alpine myself though.