Samsung Galaxy S9 - Replacing the back cover

The back cover is cracked or scratched.

  • Galaxy S9
  • 8 Steps
  • Medium
  • 30 min.
Go to the guide

Introduction

In this guide, we show you how to replace the defective back cover of your Galaxy S9. This repair can help if your back cover is broken or cracked, or you want a new color.

Click the small Play button in the top right of an image to play a video for each step.

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.

    €1.00 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 €14.99 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.

    €10.00 at the iDoc store
  • iFlex opening tool

    iFlex opening tool

    Taking apart the little pieces in your smartphone can be a big pain. The iFlex is tough but compact with a blade thickness of just 0.15 mm so it fits into even the smallest spaces, like the gap between the display and frame or under the logic board. The iFlex is made of stainless steel and designed for a good grip, making this convenient tool the perfect assistant for every smartphone repair.

    €9.00 at the iDoc store
  • iPlastix

    iPlastix

    Taking apart the little pieces in your smartphone can be a big pain. The iPlastix is tough but thin with a blade thickness of just 0.15 mm, so it fits into even the smallest spaces, like the gap between the display and frame or under the logic board. The iPlastix is made of durable plastic and designed for a good grip, making this convenient tool the perfect assistant for every smartphone repair.

    €9.00 at the iDoc store
  • Tweezers

    Tweezers

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

    €10.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

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

    €1.00 at the iDoc store
  • Suction cup

    Suction cup

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

    €2.00 at the iDoc store

Required replacement part

  • Samsung Galaxy S9 Back Cover in Midnight Black

    Samsung Galaxy S9 Back Cover in Midnight Black

    Is the back cover of your Galaxy S9 deformed, cracked or scratched? You can replace it real easy!

    €46.00 at the iDoc store
Show all replacement parts for the Galaxy S9 

Replacement parts and tools for this repair

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

Samsung Galaxy S9 Back Cover in Coral Blue

Is the back cover of your Galaxy S9 deformed, cracked or scratched? You can replace it real easy!

Samsung Toolkit, 16 pieces

Whatever’s wrong with your phone, our tool kit can help you fix it. Each repair kit includes a steel laboratory spatula, an opening tool, a...

together for €95.00

Samsung Galaxy S9 Back Cover in Lilac Purple

Is the back cover of your Galaxy S9 deformed, cracked or scratched? You can replace it real easy!

Samsung Toolkit, 16 pieces

Whatever’s wrong with your phone, our tool kit can help you fix it. Each repair kit includes a steel laboratory spatula, an opening tool, a...

together for €95.00

Samsung Galaxy S9 Back Cover in Midnight Black

Is the back cover of your Galaxy S9 deformed, cracked or scratched? You can replace it real easy!

Samsung Toolkit, 16 pieces

Whatever’s wrong with your phone, our tool kit can help you fix it. Each repair kit includes a steel laboratory spatula, an opening tool, a...

together for €95.00

Getting started with the repair of your Galaxy S9

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

8 steps
  1. Switching off your device

    Galaxy S9 - Switching off your device 01
    Galaxy S9 - Switching off your device 02
    Galaxy S9 - Switching off your device 03
    1. Turn off your device by holding down the power button until the “Power off” option appears.
    2. Use your finger to confirm that you want to shut down your device and wait until the screen goes blank.

    Klick the small Play button in the top right of an image to play a video for each step.

  2. Remove back cover

    Galaxy S9 - Remove back cover 01
    Galaxy S9 - Remove back cover 02
    Galaxy S9 - Remove back cover 03
    Galaxy S9 - Remove back cover 04
    Galaxy S9 - Remove back cover 05

    To loosen the back cover, use a heat gun or an ordinary hair dryer. Warm glue is easier to loosen, allowing you to remove the back cover. The easiest way to loosen the back cover is to use a flat and flexible tool such as the iPlastix or iFlex.

    You will also need several picks to unstick the back cover all around.

    1. Heat the spot where you start and place a suction cup on the bottom of the back cover.
    2. Press a flat tool between the back cover and the frame and pull on the suction cup.

    The iPlastix is made of plastic, so it won't scratch the device. On the other hand, it's very soft and tricky to insert.

    Be extra careful, the back cover can break very easily. If necessary, apply the heat several times and try again. Removing the back cover might take half an hour. Take a little more time and work carefully to make sure you don't break anything.

    1. Once the tool is inserted, stick a pick into the gap to keep it open. Then run the tool around the entire edge to gradually loosen the glue.
    2. Then heat the next part and insert the picks one by one.

    The back cover glue is extra strong on the lower edge.

    1. Once the back cover is loosened, lift it very slightly. The fingerprint sensor underneath the camera is still connected with a cable.
  3. Disconnect fingerprint sensor

    Galaxy S9 - Disconnect fingerprint sensor 01
    Galaxy S9 - Disconnect fingerprint sensor 02
    Galaxy S9 - Disconnect fingerprint sensor 03
    1. After detaching the back cover, carefully lift it and disconnect the fingerprint sensor using the spudger.
    2. Then you can completely remove the back cover and set it aside.
  4. Remove fingerprint sensor

    Galaxy S9 - Remove fingerprint sensor 01
    Galaxy S9 - Remove fingerprint sensor 02
    Galaxy S9 - Remove fingerprint sensor 03
    Galaxy S9 - Remove fingerprint sensor 04
    Galaxy S9 - Remove fingerprint sensor 05
    1. Carefully run the steel spatula around the edges of the fingerprint sensor to unglue it.
    2. Once it is completely unglued, you can take out the sensor easily.
    3. If the sensor is hard to remove, use a heat gun to soften the glue.
  5. 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
  6. Prepare new back cover

    Galaxy S9 - Prepare new back cover 01
    Galaxy S9 - Prepare new back cover 02
    1. Remove all protective films from the back cover.
    2. Remove all adhesive residue from the display frame and fingerprint sensor.

    We didn't use a new rear glass panel for this guide, so you can see some glue residue on the reused rear glass in the following steps.

  7. Insert fingerprint sensor

    Galaxy S9 - Insert fingerprint sensor 01
    Galaxy S9 - Insert fingerprint sensor 02
    1. Put fingerprint sensor back into its original position on the back cover.
    2. Slightly press down the sensor so the glue bonds better.
  8. Connect fingerprint sensor

    Galaxy S9 - Connect fingerprint sensor 01
    Galaxy S9 - Connect fingerprint sensor 02
    Galaxy S9 - Connect fingerprint sensor 03
    Galaxy S9 - Connect fingerprint sensor 04
    • Fingerprint connector
    1. Before attaching the back cover, plug in the fingerprint sensor connector.
    2. Use a plastic tool to reach the connector.
  9. Attach back cover

    Galaxy S9 - Attach back cover 01
    Galaxy S9 - Attach back cover 02
    1. Before reattaching the back cover, check the glue. It should be sitting evenly on the back cover. You can remove any excess glue.
    2. Then press on the back cover.
    3. Heat the back cover again to bond the glue.
    4. You can press on the back cover with your fingers while the glue cools down.

    Please note that your smartphone's water ingress protection is no longer the same after you open it.

Ø 5 (4 Ratings)




Rate this repair guide

Did our instructions help you? We're looking forward to your feedback.

Submit rating

Submit rating

How did you like this repair guide?

Exceptional

Similar guides

You might also be interested in these guides.

You might be interested in

Get in touch with iDoc

Please contact our customer service for any questions about iDoc's products and services.

  • Send a message

    If you have a question about a guide or want to give us general feedback, just use our contact form

    Write a message
  • Free shipping

    From a minimum order value of 39.00 € your order will be shipped free of charge within Germany.

  • Call iDoc

    If you have any questions about our guides or services, call us from Monday to Friday, 10:00 a.m. to 6:00 p.m.

    +49 30 200 514 455
  • 5 star service

    We offer top quality and service. Our customers confirm this as well.

    Show reviews