The audio IC on the iPhone 7 and iPhone 7 Plus cause all sorts of very strange problems. It can cause the phone to boot loop. It can cause the phone to remain on apple logo, even when a restore is successful. It can cause laggy functions and no audio or some audio. When audio IC traces disconnect, jumpers are attached. 4 jumpers are attached to prevent future disconnects from these vulnerable spots as well.
Audio IC is removed and jumpers attached:
Jumpers are coated with solder mask for protection:
Audio IC is replaced:
