iFixit - Answers With Device "iPhone 12 Pro"

iPhone 12 Pro: Dark spot on camera

Tue, 31 Mar 2026 11:41:11 -0700

Hello!

Today I was taking a picture at a white background and I noticed this dark shape on my camera. I thought that it was dust or something on my lens and cleaned it carefully with some cotton and some cleaning substance for lens and they looked clean with no scratch or anything. When I opened the camera app again, the spot was still there. I never dropped my phone in water or anything. I dropped it from like 40cm on its face, but it's been like a month since then and i checked my old photos. The spot wasn't present.

Definitely it's something in there. When i zoom in, the spot gets bigger. When i zoom out, it immediately disappears, no matter the zoom out value under 1. Also, in portrait mode the spot isn't visible.

What can it be? A friend of mine told me that it can be a software problem but i doubt…

Thank you!

⟐ Commented March 31, 2026 at 11:41 MST

iPhone 12 Pro: iPhone 12 Pro 4013 Boot Loop - ear speaker replacement did not work

Tue, 17 Mar 2026 09:55:21 -0700

I have an iPhone 12 Pro which stopped working several years ago due to a boot loop where the Apple logo would just continue to re-appear over and over again and never boot to iOS. I opened it back then and by disconnecting the ear speaker/front assembly flex cable, I was able to boot just fine. I did some research and found that perhaps this can be fixed by replacing the ear speaker. I didn't feel like doing it at the time so put it in a drawer for a couple years. Last week I decided to try and fix it. I purchased a replacement ear speaker from iFixit (iPhone 12/12 Pro Earpiece Speaker). Tonight, I de-soldered the old speaker and soldered the new one on. Easy. However, this didn't fix anything. I'm still getting 4013 when I try to restore the phone in iTunes. Also tried DFU mode and I don't get 4013 but iTunes just hangs "Waiting for iPhone...". I also tried the new "Apple Devices" app with the same results.

So I just wasted $22 + shipping on a fix that did not work. Any ideas what else this could be? Kind of bummed out as this is a 512GB and has a brand new Apple battery with 100% max capacity.

I am considering purchasing a new Apple OEM display from Apple's Self Service Repair Store so that I can get this fully restored and working with Face ID but struggling with whether it's worth $250 to do so and also do not know if it's a sure fix.

⟐ Edited by author March 17, 2026 at 9:55 MST

iPhone 12 Pro: cyclic reboot every 3 minutes

Sun, 15 Mar 2026 08:53:20 -0700

Hi, my iPhone 12 pro reboots itself. I looked logs, it says that the thermalmonitord daemon did not respond for 180 seconds, and the system writes that it does not see the Prs0 sensor (it looks like a barometer). Has anyone encountered it? Is it being treated by replacing the cable or is there a problem with the processor?

⟐ Answered March 15, 2026 at 8:53 MST

iPhone 12 Pro: How do infix the No network issue

Sun, 01 Feb 2026 12:50:50 -0700

The phone has been showing no network even though there is a sim card in the phone. What can I do

iPhone 12 Pro: How to unlock 12 pro passcode

Thu, 15 Jan 2026 10:17:34 -0700

How to unlock passcode ?

⟐ Answered January 15, 2026 at 10:17 MST

iPhone 12 Pro: Microphone not work on whatsap

Tue, 09 Dec 2025 10:21:13 -0700

microphone does not work on whatsap

iPhone 12 Pro: How to find the cause when Face ID stops working

Sun, 19 Oct 2025 22:06:13 -0700

I sometimes get iPhones where Face ID doesn't work, either after the front glass has been damaged or replaced, or for no obvious reason.

What's the best way to locate the cause of the problem — and is there any reliable method to make Face ID work again once it has stopped functioning?

iPhone 12 Pro: iPhone 12 Pro Want start or error?

Tue, 07 Oct 2025 03:41:00 -0700

Hey.

I have a iphone 12 Pro. That is charging and getting warm, But it want start now. and i havent done nothing no drop no whater or something. Some one know whats can be the problem? it just died one day. tryied other batteries to.

iPhone 12 Pro: Reattach/replace lightning connector?

Sun, 21 Sep 2025 12:34:07 -0700

Connecting lightning cable doesn’t always charge. It feels like something is loose in there. And when it doesn’t connect, a good smack of the phone downwards into my palm can do the trick. Also, the lightning cable can just kind of slip out, like it’s not catching in the receptacle.

So, what do you think is going on?

⟐ Answered September 21, 2025 at 12:34 MST

iPhone 12 Pro: Unable to configure battery

Sun, 31 Aug 2025 13:38:41 -0700

iPhone starts and operates but does not connect to cellular; run the 'finish repair' routine and it fails - will not allow the digital repair to work. Have been through the Shut Down / Restart to diagnostics routine a few times. This is my fifth iFixit repair and I believe it is installed correctly. Cannot iMessage, phone, etc.

iPhone 12 Pro: What is the bare minimum an iPhone 12 Pro can run on?

Sat, 23 Aug 2025 17:22:44 -0700

I'll try to keep this quick and short.

I have an iPhone 12 Pro which is in the process of getting the back glass off, however this process has taken some time. I currently have all the components in a tray and will be putting it back together soon, but before I do, I wanted to know what was the bare minimum components I needed to get the phone to turn on. This is so that I can add components back in one by one, and be able to identify any faulty components. I would assume battery, charging port, motherboard and screen, but please advice me on this matter.

Thank you

⟐ Commented August 23, 2025 at 17:22 MST

iPhone 12 Pro: keep restarting after new battery replacement

Fri, 08 Aug 2025 01:01:05 -0700

Does anyone know how to diagnose and what the solution is to the problem of restarting after a new aftermarket battery replacement? I tried to change other batteries also, but it does not work.

iPhone 12 Pro: Switch off the phone

Wed, 06 Aug 2025 02:34:18 -0700

how to switch off the phone ?

⟐ Answered August 06, 2025 at 2:34 MST

iPhone 12 Pro: Face ID not working after battery repair

Mon, 26 May 2025 08:19:35 -0700

I replaced the battery on an iPhone 12 Pro. The process seemed to go fine, and Face ID was still working after the new battery was installed. I tested it a few times before closing up the phone, and everything looked good.

But once I closed the phone completely and powered it back on, Face ID stopped working. When I try to set it up now, it just tells me to “move iPhone a little lower” or “move closer,” but it never actually detects my face. The proximity function is still working, so it couldn't be that. I tried running the apple diagnostics, and it said that the True Depth sensor had the problem.

I didn’t mess with the Face ID components during the repair, so I’m not sure what happened. Is it possible something got slightly misaligned or pinched when closing the phone? How could it happen? What should i do now and the next time?

Any help would be appreciated.

⟐ Marked as duplicate May 26, 2025 at 8:19 MST

iPhone 12 Pro: Phone doesn't charge after ifixit battery replacement.

Tue, 06 May 2025 00:23:57 -0700

So I ordered a battery and screen adhesive from ifixit so I can replace my iPhone 12 Pro battery.

At first boot with the new battery, phone reported black screen with "battery needs charging" icon. Alright, plugged it in and it started no problem. I read that sometimes the phone needs charging juice to turn on.

It turned on and reported 60% something percent charge. Alright, following the battery calibration guide on ifixit website and on the battery's box, I left the phone to charge until it reaches 100% and leave it charging for at least 2 more hours.

Done so and came back after 6 hours to phone stuck at 94% charge. Battery optimization was enabled at the time. There was no mention of this feature in the guide. I disabled battery optimization and put the phone to charge again. Came back after 2 hours and phone was still stuck at 94% charge?

I force restarted the phone while it was charging and it showed 98% charge. Cool. I'll leave it to charge to 100% then. Except... it didn't charge...

It stayed at 98%. I thought I would have to drain it completely and charge it back up so I started using it until it would shut down, no problem. Came back home and phone went to 0%. Cool. I left it to charge overnight and in the morning I woke up with 70% battery. When I unplugged it, the % started to go down about 1% every few minutes. Strange... Plugging the phone back in told me it was charging but the % was still decreasing. Force restarted again, it showed 94% battery and it started dropping fast again.

Now I'm in the situation where I think the ifixit battery is low on charge and the phone refuses to charge it. What else can I try? Is my ifixit battery DOA and I need to get a new one (and new screen adhesive)?

iPhone 12 Pro: Do I really need to use "new" iPhone screws?

Wed, 30 Apr 2025 15:53:15 -0700

Apple's official repair manuals state: "Never reinstall a screw after it has been removed. Install only new screws. iPhone screw grooves are covered in adhesive that can’t be reused." Is that really something I should be concerned with when doing a repair?

⟐ Commented April 30, 2025 at 15:53 MST

iPhone 12 Pro: Cellular connection going into SOS mode

Sun, 27 Apr 2025 15:35:44 -0700

A few months ago I took my phone to att because my phone would go into sos mode and it wouldn't get service until I restarted it but again it would go back into sos shortly after, I took it to att and they had me take it to apple because they thought the antenna is shot, apple tested it and everything checked out fine except the sim card reader if I remember right, they suggested I take it to att and get a e-sim which I did and its been working fine ever since.

Anyway now it's doing the same thing again on e-sim, I'm going to take it to att again and see what they can do but I'm going to guess it won't be very helpful since I'm prepaid, so is there any way I can just order the 5g antennas and replace them myself? I have solder experience with small pcb components so I don't think this would be too hard but I just don't know where to get the parts.

EDIT:
I just took it too the genius bar at the apple store the evening after posting this and they ran a test on it and the e sim reader AND the sim reader is shot now, from what i'm understanding is i need a new phone but if theres any ways i could possibly fix it myself because like i said i have solder expierence and doing basic stuff with my laptop, if there's any chance that antennas could fix it or try buying a parts phone and just take the board off that?

⟐ Answer edited April 27, 2025 at 15:35 MST

iPhone 12 Pro: My iPhone 12 pro is restarting (AP Watchdog Expired)

Sat, 29 Mar 2025 11:38:08 -0700

Hi, I am so much worried. Any sort of guidance will be appreciated.

My iphone 12 pro randomly restarted and gave the following error:

"bug_type":"210","timestamp":"2023-03-08 18:51:29.00 +0500","os_version":"iPhone OS 16.3.1 (20D67)","roots_installed":0,"incident_id":"1A6325D8-D571-47D2-B0C7-501EC637832E"}

{

"build" : "iPhone OS 16.3.1 (20D67)",

"product" : "iPhone13,3",

"socId" : "0x00008101",

"kernel" : "Darwin Kernel Version 22.3.0: Wed Jan 4 21:24:52 PST 2023; root:xnu-8792.82.2~1\/RELEASE_ARM64_T8101",

"incident" : "1A6325D8-D571-47D2-B0C7-501EC637832E",

"crashReporterKey" : "6968325aceb6511bccfe9c03edd928a76c82454c",

"date" : "2023-03-08 18:51:31.56 +0500",

"panicString" : "SOCD report detected: (AP watchdog expired)",

"panicFlags" : "0x0",

"bug_type" : "210",

"foregroundAppHash" : "1634303044",

"repairStatus" : "1",

"SOCDContainers" : [{"SOCDContainer":"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","SOCDPanicString":"SOCD report detected: (AP watchdog expired)"}],

"binaryImages" : []

}

⟐ Commented March 29, 2025 at 11:38 MST

iPhone 12 Pro: iPhone 12/12 Pro Camera not working after replacement

Thu, 06 Mar 2025 18:49:41 -0700

I have a mobile workshop and I tried to move the original Camera from Iphone 12 pro to another Iphone 12 pro just for learning but I did not get it started, someone has an explanation

⟐ Commented March 06, 2025 at 18:49 MST

iPhone 12 Pro: Bad celluar connection iPhone 12 pro

Thu, 27 Feb 2025 14:00:32 -0700

Dear, today i have changed my iphone screen and battery, but after the replacement the phone loses celluar connection with no signal after 3-5 minutes (or frequent) but it comes back on after few seconds

Can something be damaged like a flex cable? i used to repair multiple phones in past, never accure this problem,

Can it be screen or bad battery issue?

⟐ Edited by author February 27, 2025 at 14:00 MST