Replacing the battery was pretty easy and I was careful about it. Didn't think I damaged anything, but to be sure, I then replaced the mic/dock/jack port assembly. Still no sound during calls or voice memos.Im guessing you might have damaged the charger port/mic assembly when removing the battery? That part can be replaced pretty cheap if I remember correctly.
YES! Very frustrating!I hate when I try to fix one thing and something else breaks