I’m trying to connect my IPhone with Bluetooth but it says failed everytime. I’ve tried deleting personal data and try doing several times. I’ve connected the sd card with my laptop as well which says format the sd card in order to use it. when ever I try to register new device it promt me to my mobile device to confirm the passcode and before tapping allow on my device the process fails. Sometimes my phone shows connected but stereo doesn’t show it on registered or connected device.