im using an iphone 3gs and an iphone 5 both updated to iOS 6.1.
I just got the Interphone F4 stereo bluetooth headset (www.interphone.cellularline.com) and when i pair it with any of my iphone and placing a call i can hear only in one speaker. I ve tried to incoming and outgoing calls, internet radio, mp3 music but i always get sound only on one speaker.
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