Hi-pitched screeching sound while making calls

This problem seems to be something internal to the iPhone 5S I have. Since June 2014, I have to attend a daily teleconference and one day, my iPhone 5S started screeching during the call. My iPhone 5S was on mute at the time and I had headphones on. I disconnected from the call and called back into the teleconference. The leader of the teleconference asked who just joined and after I confirmed it was me, the said they all heard the screeching noise.

I thought the issue was with my mobile provider (T-Mobile), so I started using Skype to attend the teleconferences. I thought everything was fine using Skype, but just the other day it happened again. My coworker in Europe confirmed everyone heard the screeching noise before I could disconnect.

This is not good. There can be up to 20 people on these teleconferences and my iPhone 5S is causing them all to pause until I can get disconnected. This needs a fix, and ASAP.

My wife is having this problem as well. Nobody seems to know how to fix it or even pinpoint the problem. What service are you two with? We are with Verizon and they said it could be the network. They indicated that it wasn't a problem with the handset, but I remain skeptical since I am not having the problem and we are on the same plan & network.

I think I have figured it out. The issue is with the LifeProof case and, for me, iPhone 6. For some reason there is feedback between the case and phone. It sounds like I am putting two microphones near one another. I am on my second brandnew iPhone 6 in a Lifeproof and still get the screeching. You can resolve this issue by going to another case that isn't fully encapsulated/waterproof (Otterbox Commuter) or when it starts to screech click the speaker phone on then right back off and the screeching stops. I have done some research and can't find any other forums where people are having issues with other non-apple phones and the Lifeproof cases. Seems to me to be an Apple/Lifeproof issue. Hopefully this helps.

I have a lifeproof nuud for my iphone 6 and I'm having the same issue. I called lifeproof today and the customer service rep told me that it's fixable. Go to your settings -> general -> accessibility-> scroll down to 'phone noise cancellation' and turn it off. Seems to have worked so far...

UPDATE- I turned off the noise cancelation and kept the Nuud lifeproof case on the phone. I have not had the screeching sound come back in almost a month. Seems to have solved the annoying issue. To turn off the noise cancellation see below-

Go to your settings -> general -> accessibility-> scroll down to 'phone noise cancellation' and turn it off. Seems to have worked so far...

This problem started with my son's phone today. I noticed when I called him a few hours ago from my iphone. Our family's iphones are with Verizon. I checked other boards for a resolution, but didn't find any. I plan to take his phone into Verizon store for troubleshooting.

I'm having the same high-pitched screech. It happens when I call a Verizon phone or land-line.

I called Verizon and they didn't know what to do to fix it. They are sending a new SIM card (not very hopeful that will help) and asked me to track calls where it happens by dialing ### (send) after a call where I was experiencing the problem. After 5 times, they can escalate the issue.

iPhone 5, OS 7.1.1.

iphone 5 7.1.2, Verizon

I am having this issue since 4 months. I have received multiple devices as replacement as my phone was still under warranty. Nothing seems to solve this.

I was being suggested below , I tried them all

1. Mark calls with ###, once I marked them they came up with an answer there is nothing wrong with the network , change the phone

2. Next phone had same issues, answer was its due to incoming calls from T mobile.

When I showed them even AT&T people heard it, they suggested to change the phone

3. Next phone had same issues, they suggested me not to use bluetooth and talk from an area with full bars (now dots). I receive at least 3 dots if not 4 or 5 at my home.

4. Next phone, they suggested to not restore the back up but setup Iphone as new. I did and only installed 1 app. Still people on other side had screeching sound, this time it was Sprint and T mobile both.

Funny part when I called apple support and verizon for the first time, even they could hear that sound.

No one seems to know why this is happening. I may buy a basic clamshell phone, insert my SIM card in that and use it for a few days to deduce if its device related or carrier. Again I am no expert.

I have the same problem when I am using my landline and calling to someone on an iPhone 5s who is with Verizon (doesn't matter if they are using a bluetooth). I can't take it. It kills my ear. The person on the cell phone doesn't hear the noise. Someone fix this problem..... Ahhhh!!

I think I have stumbled upon the answer to this problem.

My phone, too, started screeching a few months back. I went thru the ATT routine and the Apple routine. I did the wifi/bluetooth/speakerphone drill. I factory reset the phone (a new 6). Finally, Apple replaced the phone. Nothing worked.

Since the screech was electrical in nature, we even thought perhaps my hip joint replacement might be causing interference. Then we thought it might be my iPad. My computer. My car.

I got a new car. Still screeching.

Finding the answer became a career.

Last week, my sister said, 'You've tried everything else. Could it possibly be an app that's doing this?"

Bingo.

I dumped the apps that were newest and I also unchecked Notifications in Settings for most things. I have not had any screeching since then, and it's been almost a week.

I wish I could tell you which app(s) are involved but I have no idea, since I dumped about 20 of them. And it if was a Notification problem, I can't tell you which one there either.

All I can say is that after months of the most unbearable screeching you could imagine, it has finally stopped.

I'd love to hear if this works for anyone else.

Good luck!

Patty Soffer

I am with AT&T and have an iPhone 6 in a lifeproof case. I have this same issue frequently. Any more suggestions? I have had multiple iPhones and never had this issue. This is the first time I have ever used a life proof case. Could it be the case causing the issue?

I have a 6 plus with life proof case. The squeeling makes my phone unusable. It usually occurs within the first couple minutes of use. Only I can hear it. I can sometimes get it to stop by switching to speaker phone then back. When I do this the person on the other side hears a brief loud noise.

I am with Att. This problem occurs when talking to anyone. Their provider does not matter. This is my third iPhone and first time having the problem.

IVe ice wonder if it were the case. I don't think it is apps. It started before I had any apps on it. I've only had the phone two weeks.

I have a life proof case as well. I am on verizon. It happens whenever I call or receive a call. It sounds like a microphone noise. If I remove the plug and open the power port cover, it seems to stop. I am going to call life proof and see if I can get a new case.

thanks I have been having the same issue and I contacted Apple Support last week and they executed a diagnostic and backed up my phone and reloaded - then my next call I had the screeching came back on the incoming call as well as my out going call. I will remove the Lifeproof case and see what happens.