Chosen Solution
The microphone doesn’t work after I’ve replaced the back case and screen assembly. The rest of the Lightning Assembly works fine but not the mic. Anyone else run into this problem and resolved it? Everything looks like it’s in the right place after a visual inspection.
I would disassemble the charge port/dock connector to see if the main mic cable has been damaged. Also double check the front camera assembly and see if the speaker mic cable is damaged. If both look good inspect to see if there’s any adhesive or anything blocking the mic between the mesh. I’ve seen this before. The mic is ok but there’s something such as adhesive blocking it. All else fails swap out the charging/dock connector or front camera assembly. Front camera assembly with mic controls your speaker phone mic and recording mic functions…while the bottom mic attached to your dock connector/charging port controls the mic during phone calls when the phone is held yo your ear. Hope this helps.
