iFixit - Answers With Device "iPhone 12"

iPhone 12: Syscfg information on nand?

Sun, 26 Jul 2026 19:54:45 -0700

I have an iphone 12 with broken pads on the nand. Is the SYSCFG information is stored in the nand, and do i need a bga110 programmer to write the syscfg data on the new nand?

iPhone 12: Swapping 12 Board to 12 mini or data to 13 mini

Mon, 22 Jun 2026 04:51:23 -0700

Hi, I have a iphone 12 which was broken and need to replace the whole housing and display. So my question is they are asking about 15k indian rupees to fix this for the same price there are iphone 12 mini in the marketplace, Is it possible to swap the motherboard of my iphone 12 to the 12 mini ?, im using s23 now as a primary im looking for a compact device 12 mini would be nice or even 13 mini too as a secondary work related phone !. You can say i can use the mini than replacing the board but i need the data, please give me some solution it the whole data can be recovered from my 12 to 13 mini i would be great or if swapping the board will work, i will go for the 12 mini ! What's your suggestion

⟐ Commented June 22, 2026 at 4:51 MST

iPhone 12: Why is my back camera and flash light not working

Wed, 27 May 2026 02:40:22 -0700

What causes the back camera and flash light to stop working

iPhone 12: screen and power button

Tue, 19 May 2026 08:22:10 -0700

My phone screen just went black but i can hear notification but it would not turn on and my power button is not working how can i fix that and it still have battery

iPhone 12: iPhone12 not turning on

Thu, 15 Jan 2026 11:35:40 -0700

My iphone12 is not turning on. Fistly i found out that when in room temperature my iphone sometimes just turns off and not turning back on, but it turns back on after using a air blower to heat the phone up. Then i found out when i go into my camera the iphone just stuck and have to force shut down but then not turning back on.

iPhone 12: مشكلة عدم سماع صوت Problem with not hearing sound

Sat, 06 Dec 2025 14:41:04 -0700

مشكلة عدم سماع الصوت عند الاتصال في السماعه الداخلية

Translation Arabic - English

Problem with not hearing sound when calling on the internal speaker

⟐ Edited December 06, 2025 at 14:41 MST

iPhone 12: iPhone running hotter after battery replacement

Mon, 10 Nov 2025 09:47:32 -0700

My daughter is reporting that her iPhone 12 is feeling much warmer after I replaced the battery and screen this past weekend. She didn’t notice any issues with performance, and she does use a case- the same one she used before the repairs. Is this normal?

iPhone 12: Top of screen not working

Sat, 25 Oct 2025 08:43:05 -0700

Hey everyone,

After a fall the top of my iPhone 12 screen isn’t working anymore. It’s about 3 cm that aren’t working anymore. I tried restarting, updating, completely resetting the phone but nothing works.

I now believe it’s a hardware failure. Is there any way to fix this without having to replace the whole screen? Btw my screen isn’t cracked at all as I had a screen protector on it (which I have now removed)

Thanks for your help!

iPhone 12: Screen dead after dropped - screen flickers when a call comes in.

Fri, 10 Oct 2025 06:41:51 -0700

Greetings,

The phone was dropped and now the screen is non-responsive. It has been hard reset to see if that would get it back. I'm not for sure if the right steps were done for a hard reset, as I don't have the phone. If it did work, the screen isn't working.

I've looked at ordering a kit to repair, but see three options that I don't see quite an explaination of.

In-Cell LCD
Hard OLED
Soft OLED

Even though I could fix this phone myself, I'll have to determine if the price difference on Swappa.com verses having this one fixed is worth it.

Any input on the different options would be appreciated and any pros/cons on fixing verses buy a used one off Swappa.com

Thanks!

iPhone 12: iPhone 12 Board Shield Screw/Standoff Mix-Up

Fri, 19 Sep 2025 04:19:27 -0700

Hi everyone,

I’m almost finished successfully replacing the housing on my iPhone 12, but I’ve run into an issue with the screws and standoffs near the upper left corner of the logic board (where the shield plate secures).

Here’s the photo of the screws/standoffs I’m working with:

The standoff on the top left in the photo matches the screw on the bottom left, but that standoff doesn’t actually fit into the phone.

The standoff on the top right in the photo fits perfectly inside the phone, but the screw on the bottom right is the only one that threads into it — and as you can see, the head is way too tiny to properly hold down the shield plate.

So I’m stuck with either a standoff/screw pair that doesn’t physically fit the phone, or one that fits the phone but uses a screw that’s clearly wrong for the job.

Could anyone clarify which exact standoff/screw combination is correct for this spot, or point me to a diagram/photo showing how this area should look when properly assembled? I’m using a separate aftermarket screw set, but it may be missing the exact screw or standoff I need. I got the phone with those screws already lost, so I’m just trying to put it all back together as it’s supposed to be.

Thanks so much — this is one of the last steps holding me back from finishing the repair!

⟐ Commented September 19, 2025 at 4:19 MST

iPhone 12: iPhone 12; cellular gave hardware error, but now working again?

Sun, 03 Aug 2025 16:01:35 -0700

Hello,

So about a week ago the cellular stopped working on my iPhone. There wasn't even an IMEI output when dialing *#06#. I did the Apple Support check and it said there was a hardware issue. After some googling it seemed like a basebrand issue and I checked some local repair shops who quoted me on the repair.

I tried reseting the phone a few times and then also tried the DFU restore but nothing helped.

I erased the phone and put it up for sale noting the defective cellular service.

THEN, yesterday after ordering an Android phone as a replacement I dug the iphone out of the closet and restored my last backup from my Mac since I wanted to use the Switch to Android app to move my apps and such.

The cellular is working again...

I have used it since yesterday and it is still working. I can also get the imei again using *#06#

Does this mean it was a software issue? If it really was a hardware can leaving it sit really fix it?

I want to keep using it but I also don't want to be stuck without cellular while out on a trip or something.

Thank you for any advice or maybe stories of this happening to somebody else.

iPhone 12: Did I short my phone?

Thu, 24 Jul 2025 20:18:49 -0700

While repairing my iPhone from a broken screen I decided while I’m In there I needed a new battery, so I follow the steps to a tee and with the new battery in the part of my phone right above the connectors for the display immediately becomes extremely hot to the touch. But there should have been no short I only used the plastics poker to release the ribbon cables. And I tried my old battery a known good and it wouldn’t turn on. Was it the battery or me?

iPhone 12: New Battery Detected but Restart & Finish Repair is failing

Fri, 11 Jul 2025 16:06:40 -0700

Parts & Service keeps showing "A new battery was detected" and offers the "Restart and Finish Repair". I tried this several times and each time it would appear to complete successfully but would reappear after a reboot. I finally did a DFU restore (iOS 18.5) to the phone and now the "Restart and Finish Repair" just results in a spinning wheel for about 5 minutes then a return to the blue text "Restart and Finish Repair". This phone has a new aftermarket screen and I was told the battery that is in it was replaced by an Apple store shortly before I bought the phone (it is a genuine Apple battery and shows 100% health - with a warning about unable to determine etc.). Has anyone seen this before and what can I do to correct it? Or, will the phone be usable by someone if they just ignore that? I would like to sell the phone.

⟐ Commented July 11, 2025 at 16:06 MST

iPhone 12: After attach pendrive otg , Data is not showing in file manager

Tue, 13 May 2025 09:33:09 -0700

After attach pendrive otg in iphone 12 it is not showing data in file manager how to preview

⟐ Commented May 13, 2025 at 9:33 MST

iPhone 12: New charging flex still restarts every 3 mins

Wed, 12 Feb 2025 06:56:58 -0700

When I was on holiday my iPhone got wet which let to the phone screen being blank when the phone was still making sounds. When I got home I replaced the screen and battery which fixed that problem but then it started restarting every 3 minutes.

The crash log said Prs0 /nservice backboardd, so I really this was linked to the charging flex cable. I replaced the cable only to find the issue still being present. I decided to purchase an entire new casing with an authentic charge flex cable, battery etc all I need to do was place my motherboard and screen. So I've just done that but still the phone restarts every 3 mins and the same error log. I have come to the conclusion that there must be water damage on the motherboard? If this is the case is there any way I can fix it like cleaning with a cotton bud and alcohol?

Thanks

iPhone 12: Why am I having text message issues receiving after update 18?

Mon, 09 Dec 2024 11:12:40 -0700

I've tried everything recommended to fix this issue n nothing has worked

iPhone 12: What is the purpose of EFM sticker under the iPhone displays?

Fri, 26 Jul 2024 01:58:06 -0700

I see a small black sticker on the edge inside of iPhone displays. I wonder what that tiny sticker is doing inside there. And, what does it stand for?

⟐ Edited by author July 26, 2024 at 1:58 MST

iPhone 12: iPhone crashing after battery replacement

Fri, 05 Jul 2024 14:45:09 -0700

My iPhone after replacing the battery crashes and is stuck on 0% I brought it to a phone repair shop and at first it was all fine but then it just stopped working right any ideas?

⟐ Edited by author July 05, 2024 at 14:45 MST

iPhone 12: Why is my phone saying unavailable because I forgot my passcode

Wed, 26 Jun 2024 04:45:47 -0700

How do I get my phone to work if it says unavailable because I forgot my passcode

iPhone 12: Uknown Error While Restoring iPhone

Sat, 15 Jun 2024 11:08:05 -0700

After an update my iPhone went to a default blinking Apple logo. Now it says I need to restore the device. After plugging in and restoring I get an unknown error (35). 064E.0023. Any solutions? Thanks!