We got headphones with a defective jack. Because of this, when they tried to insert it into the phone (Samsung S7), they got stuck and bent the contact in the phone, which is responsible for the microphone and buttons. Now the native S7 headphones do not adjust the volume and the microphone does not work. Moreover, everything is fine on the tablet, that is, the problem is not in the native headphones, but in the fact that the phone contact is damaged. Upon closer examination, it turned out that the plug of these JBLs does not have a plastic ring between the contacts (more precisely, it is somehow defective, defective), and because of this, a gap is formed, where the foot of the Samsung connector apparently fell. Since the connector of the S7 is such that you need to stick the headphones in with a little effort (they are fixed at the very end with effort), then out of habit I pressed these JBLs a little, and that was enough. If you don’t consider that the sound is turned up at high frequencies, that the wire does not feel soft like silicone, but hard, and that they damaged the jack on a phone that was once bought for 50k, then in principle the headphones are normal (no). I am attaching a photo of the defective plug against the background of the drawn correct one. I straightened the connector's foot with a medical probe and this helped, however, in 90% of connections, the phone does not recognize the type of headphones, and the microphone with the buttons does not work. I did not expect a jamb from JBL, which recently celebrated 70 years
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