The cause of the shrieking, high-pitch squeal, audible distortion is the contamination of MEMS microphone (micro-electro-mechanical system). Yes, that little aluminum can that's centered over the driver has been contaminated by earwax. Yikes! This tight package is vulnerable to nano particles entering the internal systems and creating capacitive bridges which result in nasty audio feedback. You'll find that the distortion is triggered by bringing the affected MEMS microphone closer to your ear. There's apparently an unexplained biological connection between earwax contamination and proximity to the ear. You won't hear the distortion until your ear is near the MEMS microphone. You can absolutely clean the microphone with an 99% ISA (isopropyl alcohol) bath followed by drying under a warm lamp.

I repair this loud distortion at my shop on Long Island. http://installments-payment-plan-financing.business.site/

I’ll pose yet another question to answer your question… What will it cost and what mechanical knowledge is required to professionally separate digitizer glass from the LCD? There are two scenarios: 1. You’ve damaged your digitizer screen and want to salvage the LCD. You want to defy everything that you’ve heard about botched screen extractions. You’ve purchased a digitizer screen and LCD, separately, from two different foreign companies. The neither foreign seller can offer you instruction or even instructional video on how to do the repair. They’ll just say: “it’s easy.” Right, buddy! 2. You’ve managed to come across a local company that has the proper equipment, but wait… The parts cost you USD$30.00 altogether and the company that will fuse the parts together, properly, will want $20.00 to do it for you. Under the circumstances you should have simply purchased the digitizer/LCD full assembly and spared yourself the runaround and backflips. Scenario #1: has a failure rate of 9.5 out of 10 attempts. Do...

A silver, contact lense-shaped metalic dome is adhered on just the underside of your home button. The adhesive film is wrapped over the metalic dome to keep it in place under the home button. The adhesive film will dry out, loosen or shift from hundreds of home button presses. Once loose, it seperates from the back of the home button and may shift slightly, which causes "ghost presses" that will cause the device to make spontanious and eratic jumps back to the home screen. It jumps to home on its own, so if you're in one of the apps; the home button may "ghost press" and initiate a call, some other app or command that's normally initiated by your physical press of the home button. The home button becomes jammed and you may have to press it multiple times to regain control of your device. The solution is to remove the home button flex and replace it, if you can't re-adhere it properly.