In my beloved car I've got a FM-transmitter to be able to listen to my phone's music. Sure, this won't give me the best sound quality. Using another iPhone or another device to output sound to this FM-transmitter, it works flawlessly. The sound is actually very impressing, no static noise or cracks at all!
However, once I use my iPhone to play music, the quality becomes awful with cracks, static noise, everything. Ironically, both devices use 320kb MP3's - which makes it even more wierd.
Is my iPhone broken or am I missing something?
(both are iPhone 4S, mine is running iOS 5.0.1 while the other one is running the latest version)