So, my friend got himself iPhone headphones and tried to use them as the primary device for steam voice communication as the in build mic is shitty but what happens is that whenever I call him, I can hear myself after 0.5-1 sec. He only has the one audio jack, both for mic and voice so technically it should work fine. He is not a very tech savvy person so I'm trying to help him out here. What I suggested last time was to disable the onboard mic but apparently when he did that I couldn't hear him at all so I'm not 100% if that was the correct advice or if he just did something wrong. His Windows is 8.1. I was thinking about gettin a new mic for him but shouldn't the Apple ones work just fine, especially with the one combined jack? I think the issue here is purely software based as he tried to cover his laptop but I could still hear my voice clearly. The model of his laptop is Lenovo g680.