https://motherboard.vice.com/en_us/article/8xem8x/iphone-7-grayed-out-speaker-loop-disease-boot-loop-hangs-on-apple-logo

Federico Cerva runs a iPhone and iPad repair business in London. Instead of replacing batteries and broken screens, he focuses on more complex fixes, often acting as a subcontractor for other mobile phone shops around Europe that mail him broken Apple products that he diagnoses and repairs with a microscope and soldering iron.

For the past six months, Cerva has been receiving large numbers of iPhone 7 and iPhone 7 Plus devices—often 10 to 15 per week—with a similar issue: one of the pads that connects the audio chip, which is located on the motherboard near the SIM card tray, has come loose.