I recently bought an Anker SoundBuds In-Ear Sport but I have a problem with them. When I connect my iphone 6 (iOS 10.2.1) there is too much interference and it sounds really really bad even if the phone is very close. I tried to disconnect the Wi-Fi and put the phone in airplane mode only with bluetooth on and the problem continues. I’ve also tried with an old iPhone 5 (iOs 9.3.1) that I have and it works perfectly without any interference. Why is that?
Could someone please help me with this problem?