Bringing back the iPhone headphone jack - in China

Remember when Scotty Allen built his own iPhone from parts bought in Shenzhen? This time around, he ups the ante and adds a headphone jack to an iPhone 7. He had to design his own custom circuit board, have it printed, and build it into his iPhone 7. It's an amazing project, and it's an incredibly interesting 30 minute video.I've spent the past four months in Shenzhen, China, modifying an iPhone 7 to add a fully functional headphone jack. To the best of my knowledge, this is the first time anyone has done anything like this.In April, I decided to finally upgrade my iPhone 6s to an iPhone7 to get better camera quality for the videos I was shooting when I was out on adventures in the industrial markets and manufacturing world. But I was super annoyed that it doesn't have a headphone jack! I already have headphones I really liked, and I didnit like the idea of having to keep track of an adapter just to use them.So I figured I'd add my own - after all, how hard could it be?It turns out, really really hard. But possible.He sent the circuit board he designed and built to Apple, and open sourced all the schematics needed so those with the right tools and expertise can build it at home.