Repair Guides

Moderate45 min – 1 h12 steps

If your iPhone 12 Pro has a cracked outer glass, unresponsive touch controls, or displays vertical lines and black spots, a screen replacement is the definitive fix. This repair requires careful handling of delicate internal ribbon cables and transferring the original sensor assembly to preserve Face ID. Expect to work with tiny, specialized screws and strong adhesive, so a steady hand and patience are your best assets.

Required Tools

P2 Pentalobe screwdriverY000 Tri-point screwdriverPhillips #000 screwdriverSuction cup or specialized opening toolPlastic opening picksNylon spudgerPrecision tweezersHeat gun, hair dryer, or heating padReplacement waterproof display adhesiveReplacement iPhone 12 Pro OLED screen
  1. 1

    Safety First & Power Off

    • Before starting, discharge your iPhone's battery below 25% to minimize the risk of a thermal event if the battery is accidentally punctured.
    • Press and hold the side button and either volume button, then swipe to power off the device completely.
    • If your screen is severely shattered, apply clear packing tape over the glass to prevent shards from escaping and to give the suction cup a smooth surface to grip.
  2. 2

    Remove the Pentalobe Screws

    • Locate the two 6.7 mm Pentalobe screws on the bottom edge of the iPhone, positioned on either side of the Lightning charging port.
    • Use a P2 Pentalobe screwdriver to remove both screws.
    • Keep these screws separated from the internal screws, as they have a unique thread pattern.
  3. 3

    Soften the Waterproof Adhesive

    • Use a heat gun, hair dryer, or heated gel pad to apply heat to the bottom edge of the phone for about 1 to 2 minutes.
    • The heat should feel warm to the touch but not uncomfortably hot, which helps soften the strong adhesive sealing the display.
    • Gently move the heat source around the entire perimeter of the screen to ensure an even soften.
  4. 4

    Create a Gap and Insert an Opening Pick

    • Place a suction cup on the lower half of the screen, just above the charging port.
    • Pull up on the suction cup with steady, firm pressure to create a tiny gap between the screen glass and the outer frame.
    • Carefully slide a thin plastic opening pick into this gap at the bottom edge of the phone.
  5. 5

    Slice the Adhesive Perimeter

    • Slowly slide the opening pick around the bottom, right, and top edges of the phone to cut through the adhesive seal.
    • When navigating the left edge (the side with the volume buttons), do not insert the pick more than 2 mm deep, as the delicate display and digitizer ribbon cables are located here.
  6. 6

    Open the iPhone Like a Book

    • Gently swing the display open from the right side to the left, using the left edge as a hinge (similar to opening a book backwards).
    • Do not attempt to fully separate the screen yet, as it is still connected by fragile cables.
    • Prop the display up at a 90-degree angle against a sturdy object to prevent strain on the flex cables.
  7. 7

    Remove the Connector Bracket

    • Use a Y000 Tri-point screwdriver to remove the six screws securing the metal connector cover plate over the logic board.
    • Carefully lift the metal bracket out of the phone using precision tweezers and set it aside, keeping track of which screw goes into which hole, as they are of different lengths.
  8. 8

    Disconnect the Battery First

    • Use the flat edge of a nylon spudger to gently pry the battery connector up and out of its socket.
    • Always disconnect the battery first before touching any other internal connectors to prevent short circuits or damaging sensitive logic board components.
  9. 9

    Disconnect the Display and Sensor Cables

    • Using your spudger, carefully disconnect the display cable, the digitizer cable, and the top earpiece/sensor assembly cable from their logic board sockets.
    • Once all three cables are disconnected, you can safely lift the old screen assembly away from the phone's chassis.
  10. 10

    Transfer the Earpiece Speaker & Sensor Assembly

    • On the back of the old display, locate the earpiece speaker and front sensor assembly at the top.
    • Use a Y000 screwdriver to remove the screws securing the speaker module.
    • Gently flip the speaker down to expose the sensors underneath, then apply light heat to the front of the screen to soften the adhesive holding the proximity sensor, flood illuminator, and microphone.
    • Carefully pry these sensors out of their recesses using tweezers, transfer the entire assembly to the new screen, and screw it securely in place.
  11. 11

    Apply New Adhesive and Reconnect

    • Clean any remaining old adhesive off the iPhone's metal frame using isopropyl alcohol.
    • Apply a new custom-cut waterproof adhesive gasket to the frame.
    • Carefully reconnect the display, digitizer, and earpiece/sensor assembly cables to the logic board, followed by the battery connector.
  12. 12

    Test and Close the Device

    • Before sealing the phone, temporarily power it on to test the new screen's touch responsiveness, brightness, and Face ID functionality.
    • Once verified, power the phone off, reinstall the metal connector bracket with its six Y000 screws, swing the screen down, and press firmly around the edges to seal the adhesive.
    • Reinstall the two bottom Pentalobe screws to complete the repair.

Disclaimer: repairs are done at your own risk. Devices contain batteries and live components; improper handling can cause injury or fire. For a safe, warrantied repair, contact us.

FAQ

Will I lose Face ID after replacing my iPhone 12 Pro screen?

You will only lose Face ID if you damage the original earpiece speaker and front sensor assembly during the transfer, or if you use a replacement assembly. The flood illuminator and proximity sensor on that cable are factory-paired to your logic board. As long as you carefully transfer the original assembly to the new screen without tearing the flex cable, Face ID will work perfectly.

Why does my phone show an "Important Display Message" after the repair?

Apple pairs the original screen's serial number to the logic board. If you replace the screen—even with an official Apple screen from another iPhone—iOS will display an "Important Display Message" in Settings stating it cannot verify the display is genuine. This message does not affect the performance or touch functionality of the screen and will disappear from your lock screen after a few days.

How do I restore True Tone functionality on the new screen?

True Tone is disabled by default when a new screen is installed, even if it is an original Apple part. To restore True Tone, you must use a specialized screen programmer (such as a JC V1S or QianLi iCopy) to read the screen data from your original display and write it onto the new replacement screen before installation.

What should I do if the screen does not turn on after reassembly?

If the screen remains black, force restart the phone first. If that fails, open the device, disconnect the battery, and carefully unplug and inspect the display and digitizer connectors. Dust or slightly misaligned pins can cause a black screen. Clean the connectors with isopropyl alcohol, plug them back in firmly until you feel a distinct "click," reconnect the battery, and try again.

Is the iPhone 12 Pro still waterproof after this repair?

While applying a new adhesive gasket helps restore dust and light water resistance, the phone will never be as waterproof as it was from the factory. Avoid submerging the device or exposing it to heavy moisture after a DIY repair.

Device

Professional Device Repair vs. DIY Guides

While our step-by-step guides are perfect for troubleshooting minor issues at home, complex hardware faults require expert intervention. If you are facing critical issues, choosing a professional phone repair Slovenia or laptop repair Slovenia service ensures your device is handled safely without risking further damage.

Why Choose KRON Servis for Your Tech Repairs?

At KRON Servis, we repair over 3,284 devices every month with an outstanding customer rating of 4.9/5. Whether you need a reliable phone repair Ljubljana or comprehensive servicing for consoles, TVs, and smart mobility, our certified technicians are here to help. We operate in two convenient locations: Zagrebška cesta 83a in Maribor and Vilharjeva cesta 29 in Ljubljana, open Monday to Friday from 8:00 to 16:00.

We use high-quality OEM parts and offer a 12-month warranty on all repairs. Professional diagnostics are available for 25 € (VAT included). Avoid the risks of DIY mistakes and let our experts restore your device. For more details on our rates, visit our pricing page, check our services, or contact us directly at questions@kron.si or via our contact form. You can also track your device anytime on our repair status page.

  • 12-month warranty
  • Original (OEM) parts
  • Your data kept confidential
  • Loaner device for mail-in repairs
  • 3,284+ devices per month