Often it’s the wireless earbuds, which won’t reconnect or are connected to the wrong device.
More often the fact that no matter how much a reviewer praised your earbuds' call quality, it's total shite and the person on the other end of the line will ask if you're in a car or using speakerphone.
Not sure if it’s because I have a big head or mumble but nobody can hear me clearly on AirPods. It’s fine with wired headphones where I tend to hold the mic in position more. It’s annoying because AirPods are great apart from that.
More often the fact that no matter how much a reviewer praised your earbuds' call quality, it's total shite and the person on the other end of the line will ask if you're in a car or using speakerphone.