Originally Posted by
0pusX Has anyone bought an FM modulator for their car that works with the iphone 4/4s?
Any of them will work. You don't need one specifically for the iPhone 4s. They just don't work very well in general. Do you really have no other connectivity options? Have you looked into aftermarket Aux In or iPhone/iPod interfaces if you have a factory radio (assuming you're intending to use this in your car)?
I had one long ago that was fairly decent but it Scosche stopped making them quite a while back and their newer ones are nowhere near as good. Don't assume that price means anything. This Scosche FM modulator that I had outperformed most of the others and it was something like $19. Definitely read up on them if you have to go with one for whatever reason(s).