Actually some FM transmitters and most speaker systems get interference from the GSM radio in the iPhone. These new devices have magnetic shielding to prevent this. You get a popup message on the iPhone whenever you plug it into an older device. Clearly you don't have one or you would know this.
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Actually some FM transmitters and most speaker systems get interference from the GSM radio in the iPhone. These new devices have magnetic shielding to prevent this. You get a popup message on the iPhone whenever you plug it into an older device. Clearly you don't have one or you would know this.