Hello world - I would like to tell you a brief story on what the hell is going on with my iphone(s) 3g 16mb. I challenge only the most technically skilled with this one. Please visit this website to see photos of everything documented. So I drop my iphone-->cracked glass. So I go on amazon.com, order a new digitizer/glass. All works well. Successfully replaced and everyone is happy. A week goes by, and again, dropped -->cracked, this time, LCD goes with it. So I go on amazon.com and order the LCD, screen with digitizer. Replacement runs smoothly. Everything goes back together just fine. Everything works except when receiving/making a phone call...no sound from the earpiece. So first I say, lets rule out cable #3 being the problem. Checked, checked and rechecked. Cable 3 is snug and secure with no damage. So I test to see if when in a phone call the screen turns black when i put my hand over the entire upper black portion of the phone. Nope - the screen stays on. So next step is to see if maybe I damaged the face proximity sensor. So in the meantime I buy a used, scratched up (but working and I tested it-fully functional) iphone 3g 16mb from my ex girlfriend. I remove the face proximity sensor from it and replace it into my phone. The problem persists. Face proximity sensor is ruled out as a possible problem. I have now ruled out a cable 3 malfunction, a face proximity sensor mechanism problem, the only thing left is maybe the main-board insertion connector. I noticed after repeated attempts inserting cable three i had nicked a piece of the plastic exposing 3 of the wire inserts. So what do I do next you ask? I remove the mainboard (notice in the pic below the mainboard is now blue [new]) from the scratched up phone and REPLACE the entire mainboard onto my phone. Guess what? the problem persists with a new face proximity sensor and new mainboard. At this point the only possible thing left is maybe a dysfunctional internal speaker earpiece is causing the entire face proximity sensor to be defective? So what do I do? I replace the entire front face. Meaning I disconnected the first 3 wires that you must when you FIRST open the phone, and I immediately transferred the entire thing to my phone. The problem still persists. I have now ruled out a speaker problem. The only possible thing left is some kind of short within the circuitry attached to the backplate by the battery. So..my next step is to then say screw it and put back together all of the original parts of both phones. Now I currently have TWO iphones that do not activate the speaker when I cover the phone. Either I am missing something, or I am being haunted by a really nasty and mean face proximity sensor goblin. WHAT AM I MISSING HERE! Can someone please help me out? I am honestly confused What I am basically looking for is to how to get my face proximity sensor/internal ear speaker to work since I cannot seem to figure it out with TWO sets of parts. Replacing: Mainboard: no resolution LCD: no resolution Cable 3/face proximity sensor: no resolution THE ENTIRE PHONE: no resolution There has GOT to be an answer.