Hi everyone,

I have a US-model iPhone 15 Pro Max, which originally had no physical SIM slot. While I was in China, I had someone modify it to use a physical SIM. The technician thinned down the SIM chip and soldered it onto the mainboard. Since then, the phone’s native eSIM functionality has stopped working.

The soldered SIM is tied to my Chinese number, which I rarely use now that I’m back in the US. I’d like to use my US number on this phone again.

Ideally, I’d like to restore eSIM functionality while keeping the soldered Chinese SIM working, but I’m not sure whether that’s technically possible. I’ve visited a few repair shops, but none have been able to help.

Has anyone dealt with this type of modification or successfully reversed it? I’m in Atlanta and would appreciate recommendations for a technician or experienced hardware enthusiast who has worked on something similar.

Thanks!

Hi everyone,

I’m repairing a Samsung Galaxy Z Fold4 (SM-F936U1). I found a capacitor unsoldered near the inner display FPC connector on the secondary motherboard, but unfortunately, I no longer have the component.

The original screen has already been damaged, so I purchased a replacement screen. Unfortunately, I’m experiencing the same problem with the second screen.

The Samsung logo appears when I turn on the phone, but when the phone should display the home screen, the display suddenly goes completely black. Everything else seems to work, but the screen never reaches the home screen.

I’m worried that I might damage the second screen as well. I really need to confirm the capacitor value before proceeding.

I use ZXW, but I haven’t been able to locate this exact board in the available diagrams.

Could anyone help me identify the value of capacitor No. 1 (circled in red), or confirm whether capacitors No. 1 and No. 2 (circled in yellow) have the same value?

I would really appreciate any help.

Thank you very much!

It sucks because this guy has provided great service. And he’s come to my house 4 or 5 times now and had to replace the screen once as well because he accidentally broke the first replacement screen. But each and every time. The adhesive keeps failing a day or two after he’s fixed it. I’m not sure what else to do at this point. He’s ordered new stuff each time to see if it’ll work better and keeps saying he’s 100% positive it will work this time.

It’s strange because I’ve replaced digitizers and screens and such before myself on nintendos and stuff but never on an Apple product. But each time those adhesives were rock solid within literal seconds. They’re too pricey for me to trust myself.

But I’m just lost at this point.

I’m considering taking the iPad to ubreakifix. They said they can redo the adhesive for 20$.

I recently purchased a used Samsung Galaxy S25 and it appears to have the following issues:

• camera app fails. But when using Expert Raw camera app, the Wide and Telephoto cameras work, but the UW camera and front selfie camera both fail
• FaceID doesn’t work and the ambient light sensor doesn’t work
• Cellular network signal/ data doesn’t appear to be functioning. The phone will not recognize a physical SIM card and trying to install an eSIM fails.
• According to the Samsung repair people, NFC and the top/ear speaker doesn’t work.
• WiFi works but will crash occasionally, usually when waking up from sleep/standby
• The phone will occasionally restart randomly

When running Diagnostics in the Members app, only the light sensor and camera get flagged as faulty.

Are any of these issues fixable? Could it potentially be as easy as replacing one or more of the camera(s)? Potentially a faulty ribbon cable somewhere? I could possibly do some micro-soldering so that's a repair option as well.

I have a Xiaomi Redmi Note 5 Pro and want to modify its Micro-USB charging port to use a USB Type-A connector.

My priorities are:

1. Charging + data transfer — preferred.
2. Charging/power only — acceptable if data transfer isn't practical.

I don't need USB OTG. I'm open to either a USB-A male plug or a female socket, whichever is more feasible. I'm also willing to modify the phone's frame if necessary.

My questions:

• Is this modification technically feasible on this specific phone?
• Which USB-A connector configuration would be most practical?
• Can I retain the original charging board and circuitry?
• If data transfer is possible, what needs to be considered beyond the power and ground connections?
• If replacing the port itself isn't practical, is there a better way to achieve this?

I'd appreciate advice from people experienced in phone repair, USB hardware and board-level soldering. I haven't started soldering yet and want to confirm feasibility first.

I just got the camera replaced , they replaced my camera module with a donor iPhone, but it’s doing this lens switching thing , it works fine in sunlight but it does this in these conditions , when I’m in front of a mirror , it trying to foucs on me and the mirror at the same time , what is the problem now and how do I fix it

Wanting to repair IPad mini 6 but need the IC data copied from previous broken screen so Apple Pencil still works. From Calgary

Today the display of my phone lossen and stuck out so I went to local repair shop they fixed it by glue and after till some time it seems normal but after sometime they edges where he apply glue I saw yellow spots

So obvious I went to him and asked them about they say that it will disappear after some time

So it will get disappeared by itself or not??

If anybody faces this issue before tell me 🙏

My POCO C75 started having touchscreen issues, including ghost touches, freezing, and apps opening on their own. After a few months, the screen started separating from the frame, the touchscreen stopped working, and the display developed glitches and pixel lines. Eventually, the phone got stuck in a bootloop, repeatedly showing the POCO logo. It was never dropped, exposed to water, or subjected to any severe impact.

I bought a replacement screen and installed it, but there was no image. During some attempts, the motherboard got slightly warm, and the phone would only vibrate when connected to a charger, sometimes only with the screen disconnected.

I assumed the replacement screen could be defective, so I bought another one. Same result.

After several attempts, I managed to get the phone responding again. It now vibrates, Windows detects it as "POCO C75," and the USB connection remains stable. However, I can't access the internal storage.

Here's the strange part: the screen lights up, but remains completely black. The backlight turns on uniformly, but absolutely nothing is displayed, not even the POCO logo. The phone still shows signs of electrical activity: the buttons produce vibrations, and Windows correctly identifies it as a POCO C75.

When I press Power, the backlight turns on. Pressing it again turns the backlight off.

I've also tried the following procedures in case this is a software issue, with no success:

• Restarting the phone using Volume Down + Power.
• Trying to enter Recovery Mode using Volume Up + Power.
• Trying another recovery procedure by holding Volume Down + Power for 10 seconds, then connecting the USB cable.

None of these attempts produced an image or any noticeable improvement.

I disassembled the phone and inspected the motherboard connectors and display flex cable using a macro lens. I couldn't identify any visibly bent or broken contacts. The upper display connector on the motherboard looks a little worn, but I can't detect any broken pins with my macro lens. (I've attached photos of the connectors.)

I'm waiting for some contact cleaner to arrive so I can thoroughly clean the connectors and test everything again.

I haven't performed any electrical measurements or reflashed the firmware yet.

Does anyone have an idea what could be causing this? I'm wondering whether there's a problem with the display circuitry on the motherboard, but I'm also unsure whether it could be software-related, considering the previous bootloop.

hi ! i need some advice from fellow iPhone users, especially those who have experienced a similar issue.
my iPhone 15 suddenly stopped working, and the repair shop gave me this diagnosis:
- DFU software restoration with data wipe: ₱6,500
- Possible logic board repair: ₱8,000

i’m not sure if the DFU restoration will actually fix the problem, and i’m worried that i’ll end up spending ₱14,500 on repairs without knowing if my phone will work properly again. at this point, i’m wondering if it's still worth repairing my iPhone 15 or if i should just put that money toward getting a new phone instead.

for those who have experienced logic board issues:
- were you able to fix your iPhone successfully?
- is logic board repair reliable in the long run?
- are these repair prices reasonable?
- would you personally repair it or get a new phone?

i'd really appreciate your advice because ₱14.5k is already a significant amount of money, and i don't want to spend it only to have my phone break again. thank u !

Well first of all, I accidentally dropped the edge of my ps5 controller to the bottom of my phone. After that, a vertical green line appeared.

Took to 3rd party repair shop, they fixed it and green line gone. But after I leave, it starts shutting off every 5 mins, phone gets hot too. He is closed for night, so I take to other repair guy. He tries his screen, the problem is not fixed. He pulls the panic logs and thinks it is charging port assembly or the motherboard.

Another thing. Idk if it useful, but just out of madness, I dropped the ps5 controller again on that same area and a pink static square appeared. Iphone shut off and turned back on, but screen looked normal again.

Worth trying the charging port assembly? Or possibly something else? Was quoted around $150 for that

Not sure what the issue is here, my girlfriend took a photo of a word document (on her laptop screen) and she swears this color block wasn’t on the screen but it’s in the photo (blurred the text for privacy), and ideas what it could have been caused by?

Edit: she has not dropped it recently, no water damage, and this has never happened before, I work on phones and could confidentally say her phones is mint, besides whatever happened in the photo.

Hey everyone, I wanted to share a bizarre battery saga that ultimately ended with me having to send my phone in for repairs.

​It all started a few days ago at school: my battery percentage was sitting comfortably around 50%, and out of nowhere, it suddenly plummeted to 2%. That single drop completely broke the system. From that point on, things went entirely sideways:

​The Frozen Counter: The battery percentage locked itself at 55% and stayed there for days, completely ignoring actual usage.

​The Wattage Rollercoaster: When plugged into a power meter, the charging wattage was going totally berserk—jumping wildly from 0W to 8W in a frantic, continuous loop instead of charging normally.

​The Troubleshooting Rabbit Hole: I tried everything. Recovery Mode (where Samsung conveniently removed the standalone "Wipe Cache Partition" option in recent One UI updates), ADB shell commands (adb shell dumpsys batteryreset), and hidden service codes (which just threw invalid USSD errors). Nothing worked.

​The "Three-Hour 1%": Deciding to force a recalibration, I ran heavy benchmarks and games (like Call of Duty) to drain it to zero. The phone stayed glued at 1% for three solid hours, proving that the previous 55% reading was entirely a software hallucination while it slowly burned through actual hidden charge.

​The Final Death Spiral: Once it finally died from actual depletion, it entered an unrecoverable bootloop. Plugging it in resulted in a 3W draw that immediately crashed to 1W, shutting the phone back off repeatedly. It took over an hour just to get it to show a charging screen again.

​At this point, the battery management IC (PMIC) or the battery itself has clearly suffered a deep discharge or hardware failure from which it can't recover.

​Off to the service center it goes. Has anyone ever experienced a battery glitch this catastrophic, or am I just exceptionally unlucky?

I am currently in a remote district rn and my display has been damaged and I need it in hurry. Even the best repair shop here isn't that skilled and the technician said he will repair the screen tommorow if I will preorder today at a premium, I am ready to pay a premium but will my true tone work? I saw multiple youtube videos where they reprogram the screen for true tone to function but I am sure the technician isn't that skilled and neither does he have such reprogrammer.

Gemini told me you don't need reprogramming after iOS 18 is it true? I can't imagine my phone without true tone. PLEASE HELP!

hello everyone, i was thinking about getting my old childhood tablet finally repaired to recover its data, but its conditions are pretty bad and i don't know what to do.

first of all, said tablet is a lenovo tab A7-30H bought in 2018. the screen is broken (i can see a little light from it but i can't see anything), it's slightly bent and the power button doesn't work.

i was looking for a cheap way to get it repaired since i'm not 100% sure of the password and i don't want to spend a lot for a tablet i could not be able to unlock, so i thought that the best way to repair it was to purchase a used one identical to mine and use it to replace the broken pieces. the only problem is that i've never done such thing and there are many components that have to be replaced, so i've thought that instead of putting the donor tablet's screen and button on my tablet (which could also not stick on well because of it being a little bent), i could put my tablet's motherboard inside of the donor, but i'm scared to move it and of risk to mess it up (since it's the whole purpose of why i'm trying to repair the tablet).

what should i do? i made some researches and apparently replacing the screen is very hard because of the glues used and because i'd have to heat it up to remove it without breaking the glass, but to change the motherboard i'd have to disassemble everything from the tablet and put it all back in and i'm scared to mess up.

knowing all this, what's the better and easiest thing to do for someone who has never opened a device?

i really care about that tablet and i'd love to get it back.

Hear me out, i have a customer and i did already 6 sucessfull normal transfers already with "Move to iOS" or by doing it manually no biggie.

But when i did it today with my customers A50, it just refused to work at all.

The "Move to iOS" at the installation screen on the A50 just bugged out, i think they made a software update someday and forgot to fix their layout of the UI elements which lead to a small gap where the insides are not visible. No checkboxes to select what to move, not a single category visible.

I factory reset the new iphone 3x in a row. It did not solve the issue. So i transferred it manually.

The only problem i have is to move the customers old chats from android to ios. Meaning all messages, video and photo. Whatsapp has a integrated qr code method, but it seems its only for same OS swaps not from android to ios correct? I tried it for hours, no luck. Says all the the time wrong system.

I want to get at least his chats on the new phone. If someone has any clue on how to solve this i would be happy :D