iPhone 12 Pro Lock Sound Issue

I confirm, it’s fixed in 14.4 😉

14.4 - fixed

I’ve had this problem myself.

Go into:

Settings

Sounds & Haptic

Then turn off (Change with Buttons)

This seems to work for me.

Hope this helps

System synths (sound) issue appears across entire iPhone 12 lineup. This includes variable/inconsistent volume levels of all system sounds including keyboard, lock, message sent/receive and other system’s synths. I am working with Apples senior support advisor on this issue.

The Lock synth distortion is triggered by MagSafe synth (when iPhone is connected to the MagSafe charger). iPhone must be restarted to restore proper Lock synth/sound.

Apple is aware of this issue and it is not fixed in iOS 14.3.

I have the same problem with my iPhone 12 Pro on version 14.3. It goes away when I reboot the phone but happens every time putting on my MagSafe phone cover.

I also have this issue on my iPhone 12 Pro, a soft reset seems to temporarily fix it too, my guess is it is a software bug, my wife has the iPhone 12 and that seems ok so far... Someone has suggested that is just when there is a case on but for me it happens whether the case is on or not. Let’s hope Apple get on this ASAP as its very annoying.

I contacted Apple support in the hope that it would get moved to the correct dev team etc by explaining what the issue is and that it is probably a software bug etc only to be advised to try a full reset and restore, even though this has been happening since it was new and out of the box, however I will try it in order to go back to them and have it escalated etc

I will keep posting any updates as and when!

I’ve never used MagSafe accessories and I have had the problem. Apple sent me a new phone and that phone still had the same problem. Keyboard sounds gradually get louder too. I factory reset, reset all settings, reinstalled iOS keeping the data, restored from backup. Nothing works, not on 2 iPhone 12 Pro’s. It’s not a MagSafe issue, it’s an iOS issue. Your case doesn’t matter either.

Having the same issue on an iPhone 12 Pro Max. Noticed the lock sound was sharper, with a lot more treble, shorter with less definition. Basically, less mechanical like the "normal" sound.

1. Rebooted the phone and the sound returned to normal with Apple's Mag-Safe case installed.
2. Attached the mag-safe charger to the back of the phone and this triggered the mag-safe sound and charging animation.
3. Locked the phone and lock sound was now "different" and back to being "short."

For me this issue started on my 11 Pro after updating to iOS 14. I thought upgrading to the 12 Pro the issue would go away, it hasn’t. So I think it’s an iOS 14 issue, not faulty devices. Was also advised to restore iOS etc. I don’t think it will help. MagSafe charger triggers it and soft reset fixes temporarily.

Today I had the chance to try the iPhone 12 Pro of a friend. And what can I say? It had the same robotic/synthetic/echoing sound problem. At first my friend told me he didn't have any sound issues but when we did some tests and comparing songs on my old Pixel 2 against the iPhone 12 Pro and my mini he also became aware of this problem. It's like "What Has Been Seen Cannot Be Unseen" but with hearing. So there seems to be a problem with the audio engine in conjunction with the built in speakers. Strangely it's not very obvious for most listeners at first without having a real comparison. Sadly I know how some songs and voices of audio book readers have to sound and immediately can hear if anything is very wrong.

It is the magsafe attaching to the iphone thst makes the lock sound glitch. 100% to do with magsafe and software. For me happened both times i attached my magsafe case and the issue went away somehow from alone.

On iOS 14.3 on my iPhone Pro 12 Max and it still happens to me. Seems to be triggered after certain apps that produce sound are used. One app being Relax Melodies. This happened on my previous phone some, too: iPhone 7 Plus. Definitely a low priority software bug.

I'm using 12 pro max if the problem occurs even though you don't wear magsafe, make an appointment with Apple

process in Turkey is moving very fast.

They gave me my new phone in just 15 minutes. Also, my brother uses 12 mini and there was no problem with him.