I have grand i10 in which a pioneer head-unit is there from last 8 months. Right from installation it does not have that good a radio reception which i mostly ignored as i use a USB mostly. Lot of times it gives a kharrr kinda noise even driving on city roads which should have no reception quality. I have not had it happen in my new creta or most cars. The signal near the pioneer shop is somehow great as going there i can never reproduce the problem in a 3 km radius and they dont come for a longer drive elsewhere where i can show the issue.
Is the radio stalk on my roof defective internally as from outside it looks all okay? should i go for those aftermarket sharkfin/ short stalk antenna if it can give a better signal ?