Some things about iPhone 7 Compatible Headphones. Today we have one good news. iPhone 7 will have 3.5mm audio jack. Yep. We spoke with our friends from Foxconn and they confirmed that Foxconn keeps goods 3.5mm audio jack in 2016 like in 2015. It’s mean than Foxconn must have a stable supply of parts for the new iPhone 7 and iPhone 7 Plus.