iFixit - Answers With Device "iPhone 4S"

iPhone 4S: Fix error-29 on 3UTools @50% of flashing

Wed, 21 Jan 2026 20:10:01 -0700

Recently I changed the battery of my iPhone 4S and itunes can't sign in then I need to sign in so I decided to restore it with iTunes but it gets error then I tried with 3UTools even switched and tried everything flashing options available for the device on the 3UTools dashboard including flashing from DFU mode but still those tools can't restore my iPhone 4S properly. iTunes just got blind fail and 3UTools gave me error-29.

Is there a way to solve this without using original battery bms tweak by changing the bms from the original battery to the new battery or installing original battery then restore and replace new battery afyer successful flashing and activating the iPhone 4S because I don't have access for the original battery(including the last usedRuggas™ battery too) thrown it unfortunately:/*, it was changed around 2018 and after that I am using another 3rd battery battery from "Ruggas™" and got same issue and bypassed using host file replacement but now I can't if I put the block on my windows host file and try to flash the phone iTunes can't connect to the Apple servers to do pthe proper flashing gave me connection error code for iTunes.

My newer battery brand is called "Moon™" another Chinese brand, same as "Ruggas™"

I don't know why it blocks update and why I can't bypass the issue wirh the host file method on this battery like what I do for Ruggas™ a long ago.

iPhone 4S: iPhone 4s screen problem

Thu, 23 Oct 2025 08:15:44 -0700

My old IPhone 4s has run into a strange issue. I have replaced the battery thinking that it was causing the black screen but it looks like tht is not the issue. If I disconnect the battery and leave it off for a minute or so the phone will come on as usual. When I power down it will not restart until I disconnect and then reconnnect. I only use the phone as a music player but would like to get it working again. It also appears that the home button has stopped too, I am not sure if this is linked? Odley when attempting to turn on it does appear to switch on but with a black screen. Any ideas

iPhone 4S: Stuck on boot loop while activating

Sat, 04 Oct 2025 15:01:39 -0700

I just bought a brand-new iPhone 4S from a thrift store today and it worked for the first parts of the setup. It then went into it's activation process and went into iOS quickly. It then turned off with a message saying "Activation Required" I opened it again and does the same thing over and over again. Anything I could be able to do? I already tried a force restart and Recovery Mode (with my MacBook Air, 13-inch, 2020, Intel) and prompted me to do DFU. It took a little bit. It didn't reinstall iOS and is currently stuck on the Connect to iTunes screen. Any help?

Thanks,

wholovechromeMe

iPhone 4S: How we fix the disabled iPhone 4s

Tue, 15 Jul 2025 08:22:23 -0700

How we fix the disabled iphone 4s

iPhone 4S: Error 29 upon replacing battery, OEM battery not available

Fri, 11 Jul 2025 20:07:02 -0700

I recently replaced my battery on my iPhone 4s using the battery from iFixit. Before the new part arrived, I naively disposed of the OEM battery, and cannot retrieve it anymore to do the traditional fixes to Error 29. I have attempted to restore my phone normally, as well as through putting it in DFU mode. This has not worked, and made my device essentially bricked. Any idea as to how to continue? I'd rather not try to find another phone to attempt that fix, so I'm open to any suggestions!

iPhone 4S: Battery replacement not working

Tue, 27 Aug 2024 13:53:18 -0700

Replaced the battery with your new one. Followed instructions but won't respond to charging. Does nothing.

⟐ Commented August 27, 2024 at 13:53 MST

iPhone 4S: iPhone 4S stuck in Recovery Mode, Error 9

Sat, 15 Jun 2024 09:58:10 -0700

Hello. I have an iPhone 4S which is stuck in Recovery Mode. Every single time I restore the phone, no matter if I use Windows or Mac. It's stuck and tells me an error occurred while telling me it was Error 9. I only have one 30 PIN cable and it has minor cosmetic damage, and it works with my other devices. I would like to repurpose the phone, so I need it. I don't need the data, so hopefully that makes things more flexible.

Thank you.

iPhone 4S: iPhone 4s won’t turn on or charge after battery replacement

Thu, 06 Jun 2024 17:21:45 -0700

I found this iPhone 4s lying around in my closet, it worked for one week until i had to get the battery replaced. When i replaced the battery and connected it into a charger, the apple logo wouldn’t show up and it didn’t even show the charge symbol. It was just plain black with nothing. The power button is stuck and the home button is nonfunctional. I have tried cleaning the charging port and checking if the battery is placed in correctly, but still nothing. Is there any way to fix it, if so it’ll mean a lot as this iPhone holds some precious memories.

iPhone 4S: Why is my iPhone 4s stuck on the apple logo?

Wed, 03 Apr 2024 05:13:06 -0700

Hi.I was using my iphone 4s for music until it reached 18% battery.I left it for the night and the next day I found it dead so I went to charge it.At first It was bootlooping but after leaving it for 2 hours it is stuck on the apple logo.I also put the positive probe of a multimeter to a part of the motherboard and the frame and it beeped.Does that indicate a short?Ive replaced the battery but it's still isn't working.Ive also try hard reseting it but nothing.I want to fix it but I also don't wanna lose any data.Is this possible?Thank you very much

iPhone 4S: iPhone 4S boot-looping, cannot update or restore.

Thu, 02 May 2024 07:16:31 -0700

I recently bought an iPhone 4S on eBay for around £7.00, the phone, when plugged into a computer will display the "Connect to iTunes" screen, iTunes will recognise it, however when I try to update it, it tells me to restore the iDevice, but every time, the phone goes to the "Progress Bar" screen, but restarts and boots back to the "Connect to iTunes" screen, a few minuets later, iTunes says, "The iPhone could not be restored. An unknown error occurred (9)". The Phone will not go into "DFU mode". When the device is not connected to a PC it will continuously boot loop until the battery dies. I have tried on two different PC's and the problem persists, I have tried restoring on 3U Tools, but still it does not work, I have been stuck on this for a while and have no idea what to do, can someone Help?

⟐ Edited May 02, 2024 at 7:16 MST

iPhone 4S: How do I reset an iPhone 4s without the original battery?

Tue, 17 Oct 2023 15:24:22 -0700

How can I reset an iPhone 4s without an original battery? I don't have a reprogramer and the original battery (Mine didn't come with a battery), so is there any tool to fix that issue that is not paid? Also, the iPhone can no longer boot into iOS once I exit recovery mode.

⟐ Commented October 17, 2023 at 15:24 MST

iPhone 4S: Why my iPhone is not able to connect with my windows pc

Sat, 11 Mar 2023 01:42:10 -0700

my iphone is stuck on connect to itunes after updating it and whem connecting it to my windows pc it is showing troubleshooting in connecting "device malfunction"

iPhone 4S: How to get back data on disabled iPhone 4

Fri, 06 May 2022 15:13:56 -0700

I have an iPhone 4 that my parents got disabled because they told me to make my password 1234 and they would not let me change it so I just changed it to something else without telling them any way they tried to get into my phone and instead of just asking me they just tried until the phone became disabled this was many years ago and I want to try and get my data back also but i need to get it to not to be disabled I also forgot my password too

iPhone 4S: Just changed out to your battery and it will charge for 13 seconds.

Wed, 13 Oct 2021 22:13:33 -0700

The phone will charge for 13 seconds at up to 250ma and vary to as low as 130ma. It will then stop charging for 10 seconds and start over and continue to repeat. I have yet to break the cycle. The old battery may have been good but now I see it’s another problem.

⟐ Commented October 13, 2021 at 22:13 MST

iPhone 4S: Bluetooth headset the other party can't hear me on any internet calls

Thu, 07 Jan 2021 12:32:43 -0700

Hello Everyone,

I have iPhone 4S, I bought new bluetooth headset, it is working fine on normal calls, but when using it on internet calls like WhatsApp calls or Messenger calls etc… the other party can’t hear me but I hear him very well, and the Audio button is flickering between (Audio symbol with 3 brackets) and (Audio symbol with bluetooth logo) I have attached gif image showing the flickering.

Here is it

By the way, I bought another one, it worked for the first time but after charging it it makes the same problem.

Please help.

Thank you

⟐ Edited by author January 07, 2021 at 12:32 MST

iPhone 4S: My iPhone charges when it's off but not charging after turning on

Mon, 05 Oct 2020 09:06:51 -0700

I bought a New battery for iPhone 4s. When I charged , it showed charging and after minutes it turned on. But after turning on, it doesn't charge. Is there any problem with my battery? Can anyone help please.

iPhone 4S: Why is my phone always in a Searching mode?

Tue, 12 May 2020 11:13:26 -0700

Why can’t I connect to to my telephone provider (AT&T) . The phone goes into a Searching mode; now I don’t have phone service. And because it’s always searching it’s draining the battery real fast. So I'‘m having to power the phone off to save on battery life.

What do you think is happening? I’ve gone through all the settings— but no change.

I do have WiFi.

Thanks for your help,

Henry Sanchez

iPhone 4S: Why is my screen separator machine losing suction?

Sun, 03 May 2020 18:45:40 -0700

As the title suggests, my screen separator machine is losing suction while trying to separate the LCD from the glass. I’m new to this so I do not believe it is the machine itself as I just got it. When I start out with the screen, everything is fine, however, once the wire has gotten maybe 1/4 of an inch under the glass, it becomes very hard to keep the screen in place.

Any suggestions?

iPhone 4S: 4 Inch Displays on the iPhone 4s, theoretically possible?

Wed, 15 Apr 2020 10:07:47 -0700

Hi, looking to start a (another) iPhone modding for fun. I want to try to use a iPhone 5 LCD on the 4s. I don’t care about touch or backlight for the moment. How difficult would it be (have lots of microsoldering experience already so that’s not the problem).

For resolution could we just do it via software like some of those resolution JB tweaks do?

Could we just map the MIPI Lines to the iP5 Panel or would there be lots of additional work required (like using an FPGA)

Thanks!

iPhone 4S: iPhone 4S will not stay switched off after new battery installed

Sat, 28 Mar 2020 16:43:44 -0700

Original battery not holding charge for more than a few hours from 100% charged.

New compatible battery installed by shop.

Charged to 100%, then iPhone 4S used as normal.

Switching off the phone using power button gets the following behaviour:

it restarts after about 6-10 secs;
repeated attempts to switch off gets same behaviour.

⟐ Commented March 28, 2020 at 16:43 MST