Resposta para "How to fix "This accessory is not optimized for this iPhone” error?"i started having the same problem since yesterday. i realized i had removed my hone from docking station with out pausing or stopping phone from playing. so the sound controls where gone. i also realized i had change the volume from docking station before removing. so i put the phone back on docking station and change volume to what is was before (max) and phone is working fine now. hope this helps.