The screen of your Galaxy S21 FE 5G is broken? The touch screen does not work properly anymore?

Then it's time to replace the screen. In this detailed photo tutorial, we will show you step by step how to do it best.

If the glass of your screen is heavily cracked, secure it with parcel tape beforehand to avoid potential injuries during the repair.

A clean and even workspace prevents scratches on case and screen glass.

We wish you good luck with your repair!

Required tools

  • Flat Picks

    Flat Picks

    You need a very flat tool such as a flat pick to pry out parts that are glued in place.

    €4.00 at the iDoc store
  • Heat gun

    Heat gun

    You can use a heat gun to heat parts that are glued on so they’re easier to remove. In most cases, you can also use a hairdryer.

    from €14.47 on Amazon
  • For storing screws

    For storing screws

    We recommend storing your screws so you don’t mix up the various screws and small parts.

    €9.00 at the iDoc store
  • Tweezers

    Tweezers

    We recommend using tweezers to remove screws and various small parts from your device.

    €11.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

    You need a flat plastic prying tool to disconnect the various plugs and connectors.

    €2.00 at the iDoc store
  • Suction cup

    Suction cup

    A suction cup is perfect for lifting smooth surfaces such as displays or rear glass panels.

    €3.00 at the iDoc store
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    €13.00 at the iDoc store

Required replacement part

Show all replacement parts for the Galaxy S21 FE 5G 

Replacement parts and tools for this repair

Our tools plus the right spare part help you fix your device easily.

Getting started with the repair of your Galaxy S21 FE 5G

If you get stuck or have questions, you can post a comment. We’d be happy to help.

37 steps
  1. Switching off your Samsung Galaxy S21 FE 5G

    Galaxy S21 FE 5G - Switching off your Samsung Galaxy S21 FE 5G 01
    Galaxy S21 FE 5G - Switching off your Samsung Galaxy S21 FE 5G 02
    Galaxy S21 FE 5G - Switching off your Samsung Galaxy S21 FE 5G 03

    Use our checklist to test the basic functions of your Galaxy S21 FE 5G before repairing. This way you can check afterwards if your repair was successful.

    1. Press and hold the side and volume down button simultaneously for a few seconds. You can also switch off your Galaxy via quick access.
    2. Tap on Power off in the displayed menu.
  2. Removing the SIM tray

    Galaxy S21 FE 5G - Removing the SIM tray 01
    Galaxy S21 FE 5G - Removing the SIM tray 02
    Used tools
    1. Press a pointed object into the small opening of the SIM tray to push it out of the device frame. We use a SIM tool for this purpose.
    2. Then pull the tray completely out of the frame.
    Used tools
  3. Heating up the back cover

    Galaxy S21 FE 5G - Heating up the back cover 01
    Used tools
    Heat gun

    Once you open your device its specified IP68 certification will expire.

    The edge of the back cover is heavily glued. In order to remove it, you first have to heat the adhesive sufficiently with hot air. Use a heat gun or an ordinary hair dryer for this purpose.
    1. Heat the edge of the back cover by running the hot air device evenly over it.
    Used tools
  4. Lifting up the back cover

    As an alternative to the suction cup, we can recommend the iSclack, which requires less force to lift up the back cover.

    The iFlex can be inserted particularly well between the back cover and the screen unit due to its sharp edges.

    1. Attach a suction cup to the lower edge of the back cover and pull it upwards to create a narrow gap.
    2. At the same time, insert a flat tool into the gap between the back cover and the screen unit.


    Used tools
  5. Detaching the back cover

    Galaxy S21 FE 5G - Detaching the back cover 01
    Galaxy S21 FE 5G - Detaching the back cover 02
    Galaxy S21 FE 5G - Detaching the back cover 03
    Galaxy S21 FE 5G - Detaching the back cover 04
    Used tools
    Heat gun

    To avoid damaging the camera module, you should not insert your tool too far.

    In order to prevent the glue of the back cover from bonding again, we recommend sliding flat plastic picks under the back cover at regular intervals.

    1. Drive your tool completely around the edge of the back cover to loosen it piece by piece.
    2. Put the detached back cover aside.


    Used tools
  6. Detaching the board cover

    • 9 × 3.8 mm Phillips

    We recommend using a screw storage to keep all disassembled parts and screws safe and organized. Our magnetic pad has the additional advantage that nothing can move on it.

    A small arrow as well as a notch show you where you can place your levering tool best.

    1. Loosen the nine Phillips screws that secure the plastic cover above the motherboard.
    2. Then carefully lever the cover out of its guide with a spudger.
  7. Disconnecting battery and charging coil

    Galaxy S21 FE 5G - Disconnecting battery and charging coil 01
    Galaxy S21 FE 5G - Disconnecting battery and charging coil 02
    Galaxy S21 FE 5G - Disconnecting battery and charging coil 03
    Galaxy S21 FE 5G - Disconnecting battery and charging coil 04
    Galaxy S21 FE 5G - Disconnecting battery and charging coil 05
    Used tools
    • Connector

    To avoid a potential short circuit during the repair, you should always detach the battery connector first.

    When separating connectors, always start from the side where there are no small components on the board. This way you avoid potential damage.
    1. Fold the loosened board cover around.
    2. Carefully disconnect the orange battery connector and black charging coil connector with a spudger from the motherboard.
    3. Pull the glued end of the cover off the speaker.
    Used tools
  8. Removing the speaker

    • 6 × 3.8 mm Phillips
    1. Loosen the six Phillips screws that hold the speaker in place.
    2. Carefully lever the speaker out of its guide and set it aside.
  9. Separating the screen cable

    • Connector

    The screen cable of the S21 FE 5G can be fully removed. The lower part of the cable is connected to a separate slot that sits somewhat recessed in the screen unit.

    1. Carefully separate the two connectors of the screen cable with a spudger.
    2. Take the disconnected cable out of your device.
    Used tools
  10. Separating the connecting cables

    • Connector
    1. Separate the two connecting cables from the motherboard and the USB board with a spudger.
    2. Put the disconnected cables aside.
    Used tools
  11. Heating up the battery's adhesive

    Galaxy S21 FE 5G - Heating up the battery's adhesive 01
    Used tools
    Heat gun

    The battery of the S21 FE 5G is heavily glued into the display unit. In order to loosen it safely, you need to heat up the glue in advance.

    Never heat the sensitive battery directly, but only from the display side.

    1. Heat the battery by running a hot air gun evenly over the corresponding opposite area on the screen.
    Used tools
  12. Removing the battery

    Galaxy S21 FE 5G - Removing the battery 01
    Galaxy S21 FE 5G - Removing the battery 02
    Galaxy S21 FE 5G - Removing the battery 03
    Galaxy S21 FE 5G - Removing the battery 04
    Galaxy S21 FE 5G - Removing the battery 05

    The battery can be loosened particularly well if you move the iPlastix under the battery with a knife movement.

    1. Place a battery spudger on the lower edge of the battery and carefully lift it upwards.
    2. Remove the detached battery from the device.
    3. Insert the flat iPlastix under the battery at the lifted edge and detach the battery bit by bit from the bottom of the screen unit.
    Used tools
  13. Separate connectors from the motherboard

    Galaxy S21 FE 5G - Separate connectors from the motherboard 01
    Galaxy S21 FE 5G - Separate connectors from the motherboard 02
    Galaxy S21 FE 5G - Separate connectors from the motherboard 03
    Used tools
    • Connector
    1. Separate the two remaining connectors from the motherboard. These belong to the front camera and the volume buttons.
    Used tools
  14. Removing the motherboard

    • 1 × 3.3 mm Phillips

    Be careful when removing the motherboard, to avoid damaging the still connected main camera as well as the connector of the front camera.

    1. Loosen the single Phillips screw that secures the motherboard.
    2. Then use a spudger to carefully lever the loosened board out of the device.
  15. Removing the vibration motor

    Galaxy S21 FE 5G - Removing the vibration motor 01
    Galaxy S21 FE 5G - Removing the vibration motor 02
    Used tools
    Heat gun

    The vibration motor is slightly glued. To make it easier to remove, you can heat it briefly with hot air.

    A small notch in the guide of the vibration motor shows you where to place your tool.

    1. Carefully slide under the vibration motor with ESD tweezers and detach it from the bottom of the screen unit.
    2. Put the detached vibration motor aside.
  16. Removing the front camera

    Galaxy S21 FE 5G - Removing the front camera 01
    Galaxy S21 FE 5G - Removing the front camera 02
    Galaxy S21 FE 5G - Removing the front camera 03
    Used tools
    Heat gun

    The front camera is heavily glued in the screen unit. Therefore, you should heat it for a sufficiently long time to be able to remove it more easily.

    1. Carefully lever the camera out of its guide by gently running ESD tweezers between the adhesive layer and the camera guide.
    2. Put the detached camera aside.

  17. Disconnecting the fingerprint sensor

    Galaxy S21 FE 5G - Disconnecting the fingerprint sensor 01
    Galaxy S21 FE 5G - Disconnecting the fingerprint sensor 02
    Galaxy S21 FE 5G - Disconnecting the fingerprint sensor 03
    Used tools
    • Connector
    1. Disconnect the fingerprint sensor by carefully levering its connector off the USB board.
    Used tools
  18. Removing the USB board

    • 3 × 3.3 mm Phillips

    Be careful not to damage the flex cable of the fingerprint sensor when removing the USB board. If necessary, hold it aside.

    1. Loosen the three Phillips screws that secure the USB board.
    2. Then lever the loosened board out of the device.
  19. The right tools for your repair

    With the right tools, you will succeed in any repair. In our store you will find a large selection of professional quality tools.
    VIEW NOW
  20. Removing the fingerprint sensor

    Galaxy S21 FE 5G - Removing the fingerprint sensor 01
    Galaxy S21 FE 5G - Removing the fingerprint sensor 02
    Galaxy S21 FE 5G - Removing the fingerprint sensor 03
    Used tools
    Heat gun

    The fingerprint sensor is slightly glued. To make it easier to remove, you can heat it briefly with hot air.

    1. Carefully slide under the fingerprint sensor with ESD tweezers and detach it from the bottom of the screen unit.
    2. Put the detached sensor aside.
  21. Preparing the new display

    1. Prepare your replacement screen by removing all protective films from the screen's inside.
    2. In order to protect the screen from scratches, you can leave the film over the screen glass on until the end of the repair.
    Used tools
    Verwendete Ersatzteile
  22. Inserting the fingerprint sensor

    Galaxy S21 FE 5G - Inserting the fingerprint sensor 01
    Galaxy S21 FE 5G - Inserting the fingerprint sensor 02
    1. Place the fingerprint sensor in its guide in the screen unit and press it firmly.
    Used tools
  23. Installing the USB board

    • 3 × 3.3 mm Phillips
    Be careful not to pinch the flex cable of the fingerprint sensor when inserting the USB board. If necessary, hold it aside.

    When inserting the USB board, make sure that the charging jack is properly inserted into the edge of the case.

    1. Put the USB board back in the screen unit.
    2. Fix it with the three Phillips screws.
  24. Connecting the fingerprint sensor

    Galaxy S21 FE 5G - Connecting the fingerprint sensor 01
    Galaxy S21 FE 5G - Connecting the fingerprint sensor 02
    • Connector


    Never press down connectors with force. Damage can lead to the failure of an entire component.

    1. Reconnect the fingerprint sensor by gently pressing its connector onto the board. It should click into place audibly and perceptibly.
  25. Inserting the front camera

    Galaxy S21 FE 5G - Inserting the front camera 01
    Galaxy S21 FE 5G - Inserting the front camera 02
    1. Put the front camera back into its guide and press it firmly.
    Used tools
  26. Inserting the vibration motor

    Galaxy S21 FE 5G - Inserting the vibration motor 01
    Galaxy S21 FE 5G - Inserting the vibration motor 02
    1. Put the vibration motor back into its guide and press it lightly.
    Used tools
  27. Installing the motherboard

    • 1 × 3.3 mm Phillips

    Make sure not to pinch any connectors when inserting the board. If necessary, hold them aside with a pair of tweezers.

    1. Put the motherboard back into your device. It must sit level all over.
    2. Fix it with the single Phillips screw.
  28. Attaching connectors on the motherboard

    Galaxy S21 FE 5G - Attaching connectors on the motherboard 01
    Galaxy S21 FE 5G - Attaching connectors on the motherboard 02
    Galaxy S21 FE 5G - Attaching connectors on the motherboard 03
    • Connector
    1. Reconnect front camera and volume buttons by gently pressing their connectors onto the board.
  29. Inserting the battery

    Galaxy S21 FE 5G - Inserting the battery 01
    Galaxy S21 FE 5G - Inserting the battery 02
    1. Put the battery back into its guide and press it firmly. The remaining glue on the back of the battery is usually enough to securely reattach it.
  30. Attaching the connecting cables

    • Connector

    The cable labeling will help you align them in the device.

    1. Align the two connecting cables one after the other in the device and attach their two connectors on the USB and motherboard each.
    Used tools
  31. Attaching the screen cable

    • Connector

    The cable labeling will help you align it in the device.

    1. Align the screen cable in the device and attach its two connectors on the motherboard and the separate slot in the screen unit.
    Used tools
  32. Installing the speaker

    • 6 × 3.8 mm Phillips
    Make sure that the speaker sits level all over. Its plastic lugs must fit into the edge of the case.
    1. Put the speaker back in its original position.
    2. Screw it in place with the six Phillips screws.
  33. Connecting battery and charging coil

    Galaxy S21 FE 5G - Connecting battery and charging coil 01
    Galaxy S21 FE 5G - Connecting battery and charging coil 02
    Galaxy S21 FE 5G - Connecting battery and charging coil 03
    Galaxy S21 FE 5G - Connecting battery and charging coil 04
    • Connector


    Always connect the battery last to avoid a potential short circuit.

    1. Align the charging coil above your device.
    2. Connect the black charging coil connector and the orange battery connector to the motherboard.
  34. Installing the board cover

    • 9 × 3.8 mm Phillips
    1. Place the board cover in its guide. It must sit level all over.
    2. Reattach its glued end to the speaker.
    3. Screw the cover in place with the nine Phillips screws.
  35. Testing the replacement screen

    Galaxy S21 FE 5G - Testing the replacement screen 01
    Galaxy S21 FE 5G - Testing the replacement screen 02
    Galaxy S21 FE 5G - Testing the replacement screen 03

    Before you close your Galaxy S21 FE 5G for good, we recommend testing the replacement screen as well as other basic functions of your phone. This way, you can make sure that your repair was successful. Again, use our checklist for this or the internal Samsung test menu, which you call up via the code *#0*#.
    If something doesn't work properly during testing, double-check that everything is installed and attached correctly.

    1. Switch on your Galaxy again.
    2. Test the touch function by dragging an app across the screen.
  36. Attaching a new adhesive frame (optional)

    If the adhesive frame is still in good condition, you do not need to install a new one. However, if it has defects or no longer sticks properly, we recommend that you use a new adhesive frame. On our YouTube channel you can find a detailed video on the topic.

    1. Peel off the carrier film from the bottom of the adhesive frame and press it onto the edge of the back cover. A spudger can help you with this.
    2. Now carefully peel off the remaining protective film from the top of the adhesive frame.
    Used tools
    Verwendete Ersatzteile
  37. Attaching the back cover

    Galaxy S21 FE 5G - Attaching the back cover 01
    Galaxy S21 FE 5G - Attaching the back cover 02
    Used tools
    Heat gun

    We recommend that you run hot air over the edge of the back cover again, so that the glue bonds properly. You can also weigh down your device with books for a few minutes.

    1. Close your Galaxy S21 FE 5G after the repair by pressing the back cover back onto the screen unit.
    Used tools
  38. Inserting the SIM tray

    Galaxy S21 FE 5G - Inserting the SIM tray 01
    Galaxy S21 FE 5G - Inserting the SIM tray 02

    Make sure to insert the SIM tray the right way around.

    1. Re-insert the SIM tray once the back cover is properly and firmly in place. It has to click in place audibly and perceptibly.
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