So my series 3 mic has stopped functioning after 1 shower. It was working fine right after until about an hour later Siri couldn't hear me. Text transcription couldn't dictate. I went thru apple care, did all the troubleshooting including remote diagnostics with them. Nada. Did the sound lock 4 times and allowed it to charge 24 hours as well. Doing a replacement. This is just a heads up to be weary of the water proofing and mic durability when in contact with any water. Not just high velocity water.
