Introduction

Use this guide to replace the back panel glass on the Samsung Galaxy S8 Plus.

If your replacement part does not come with adhesive mounted on it, you will also need to purchase adhesive for the rear glass and the fingerprint reader. You can buy pre-cut adhesive, or thin high-bond tape.

Opening your phone will compromise its waterproof seals. Have replacement adhesive ready before you proceed, or take care to avoid liquid exposure if you reassemble your phone without replacing the adhesive.
  • Opening your phone will compromise its waterproof seals. Have replacement adhesive ready before you proceed, or take care to avoid liquid exposure if you reassemble your phone without replacing the adhesive.

  • Prepare an iOpener and heat the back of the phone along its left edge for about two minutes. This will help soften the adhesive securing the back cover.

    • You may need to reheat and reapply the iOpener several times to get the phone warm enough. Follow the iOpener instructions to avoid overheating.

    • A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the OLED display and internal battery are both susceptible to heat damage.

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In the following steps, you'll be cutting through the adhesive securing the back cover. The adhesive is laid out as seen in the first image, which shows the inside of the cover after it has been removed.
  • In the following steps, you'll be cutting through the adhesive securing the back cover.

  • The adhesive is laid out as seen in the first image, which shows the inside of the cover after it has been removed.

  • As seen from outside the phone, you'll be slicing through the adhesive in the areas shown:

    • Thick portions of adhesive

    • Thin areas of adhesive

    • Avoid prying or slicing in this area, to protect the fingerprint sensor flex cable.

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Secure a suction cup to the back cover, as close to the heated edge as possible. The suction cup will not make a good seal on the curved portion of the glass, so avoid putting it on the very edge.
  • Secure a suction cup to the back cover, as close to the heated edge as possible.

    • The suction cup will not make a good seal on the curved portion of the glass, so avoid putting it on the very edge.

    • If the phone's back cover is cracked, the suction cup may not stick. Try lifting it with strong tape, or superglue the suction cup in place and allow it to cure so you can proceed.

  • Lift the back cover's left edge with your suction cup, opening a slight gap between the back cover and the frame.

    • This may require a significant amount of force, but you only need to open a very slight gap with the suction cup to insert your tool.

    • If you have trouble, apply more heat to further soften the adhesive, and try again. The adhesive cools very fast, so you may need to heat it repeatedly.

    • If you're using an iOpener, follow instructions to avoid overheating it, or the gel pack may burst.

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Insert an opening pick into the gap. The rear glass can break if you use too much force or attempt to pry with metal tools.
  • Insert an opening pick into the gap.

  • The rear glass can break if you use too much force or attempt to pry with metal tools.

  • Optionally, once the pick is inserted, you can add a few drops of isopropyl alcohol into the gap to help weaken the adhesive in the following steps.

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Slide your opening pick along the left edge of the phone to slice through the adhesive securing the back cover. Afterward, it may help to leave the pick in place and grab a second pick as you proceed to the next step. Leaving the pick inserted can help prevent the glue you just separated from re-adhering. Afterward, it may help to leave the pick in place and grab a second pick as you proceed to the next step. Leaving the pick inserted can help prevent the glue you just separated from re-adhering.
  • Slide your opening pick along the left edge of the phone to slice through the adhesive securing the back cover.

  • Afterward, it may help to leave the pick in place and grab a second pick as you proceed to the next step. Leaving the pick inserted can help prevent the glue you just separated from re-adhering.

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Continue slicing through the adhesive along the bottom edge of the phone. Re-heat the back cover as needed to prevent the glue from cooling and hardening.
  • Continue slicing through the adhesive along the bottom edge of the phone.

    • Re-heat the back cover as needed to prevent the glue from cooling and hardening.

    • The glued area is larger here, so you'll need to insert your pick farther into the phone to fully separate it.

  • Again, it may help to leave the opening pick in place and grab another one for the following step.

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Slice through the remaining adhesive along the top edge and right side. You can damage the fingerprint sensor's flex cable if you insert your pick too far in this step. Work carefully and use the diagram in step 2 for guidance. You can damage the fingerprint sensor's flex cable if you insert your pick too far in this step. Work carefully and use the diagram in step 2 for guidance.
  • Slice through the remaining adhesive along the top edge and right side.

  • You can damage the fingerprint sensor's flex cable if you insert your pick too far in this step. Work carefully and use the diagram in step 2 for guidance.

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Don't try to fully remove the back cover yet. Lift the back cover from its left edge and hinge it open slightly.
  • Don't try to fully remove the back cover yet.

  • Lift the back cover from its left edge and hinge it open slightly.

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Use the point of a spudger to pry up and disconnect the fingerprint sensor flex cable. Use the point of a spudger to pry up and disconnect the fingerprint sensor flex cable.
  • Use the point of a spudger to pry up and disconnect the fingerprint sensor flex cable.

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During reassembly, in order to reconnect the fingerprint sensor cable, first angle the back cover into position until the cable connector lines up perfectly over its socket. Then, use the flat end of your spudger to gently snap the connector into place by pressing it straight down. If you have slender hands, you may be able to press the connector into place with your finger. Just be careful not to strain the cable.
  • During reassembly, in order to reconnect the fingerprint sensor cable, first angle the back cover into position until the cable connector lines up perfectly over its socket.

  • Then, use the flat end of your spudger to gently snap the connector into place by pressing it straight down.

    • If you have slender hands, you may be able to press the connector into place with your finger. Just be careful not to strain the cable.

  • This takes patience and a bit of practice. Don't rush it or attempt to force the connector into place.

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  • Remove the back cover.

  • To reinstall the back cover:

    • First use tweezers to peel away any remaining adhesive from both the back cover and the phone's chassis.

    • Then, clean the adhesion areas with high concentration isopropyl alcohol (at least 90%) and a lint-free cloth. Swipe in one direction only, not back and forth. This will help prep the surface for the new adhesive.

    • Be sure to turn on your phone and test your repair before installing new adhesive and resealing the phone.

    • Replacement adhesive comes in a pre-cut sheet to match the exact contours of the back cover. If that's not available, you can use a high-bond double-sided tape, such as Tesa 61395. Be aware that this leaves gaps that are vulnerable to liquid intrusion.

    • After installing the rear cover, apply strong, steady pressure to your phone for several minutes to help the adhesive form a good bond, such as by placing it under a stack of heavy books.

  • If desired, you may reinstall the back cover without replacing the adhesive. Remove any large chunks of adhesive that might prevent the back cover from sitting down flush. After installation, heat the back cover and apply pressure to secure it. It won't be waterproof, but the glue is usually more than strong enough to hold.

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If you're installing a new rear glass panel, you'll also need to transfer the fingerprint sensor to your new rear glass panel as follows: Reheat an iOpener and apply it to the fingerprint sensor, in order to soften the adhesive securing it to the rear glass.
  • If you're installing a new rear glass panel, you'll also need to transfer the fingerprint sensor to your new rear glass panel as follows:

    • Reheat an iOpener and apply it to the fingerprint sensor, in order to soften the adhesive securing it to the rear glass.

    • Push gently but firmly against the fingerprint sensor from the outward-facing side of the glass panel, until the adhesive securing it separates.

  • If you have trouble pushing the fingerprint sensor out, apply more heat, and/or carefully slide a pick along the edge of the sensor to cut some of the adhesive.

  • For best results, remove all old adhesive from the sensor, clean it carefully with isopropyl alcohol, and install new adhesive.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

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Adam O'Camb

Member since: 04/11/2015

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5 Comments

If I don't have a microwave to heat the iOpener, can i boil it for a few seconds maybe?

Nick F - Reply

@Nick sure, you even can put some noodles while you cook your s8.

Jaro Alekseenko - Reply

If the back is very cracked, it will be a lot harder!

bartonjenn314 - Reply

If I'm purchasing the Tesa 61395 Tape separately, which size did I need? The 1mm?

Ana Hernandez - Reply

Hi Ana, I’d recommend the 1 mm tape, as it can fit into the small edges around the cover.

Adam O'Camb -

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