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Featured Guide

Difficulty

Moderate

Steps

15

Time Required

                          45 minutes - 1 hour

Sections

4

  • Samsung Galaxy M31 Back Cover Removal
  • 6 steps
  • Samsung Galaxy M31 Motherboard Cover
  • 2 steps
  • Samsung Galaxy M31 Battery Disconnect
  • 1 step
  • Battery
  • 6 steps

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Introduction

If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling your phone. This reduces the risk of a dangerous thermal event if the battery is accidentally damaged during the repair.

You’ll need replacement adhesive to reattach components when reassembling the device.

What you need

Step 1

              Remove SIM Card Tray
  • Insert a SIM card eject tool, a SIM eject bit or a straightened paper clip into the hole on the SIM tray located at the left side of the phone.
  • Press firmly to eject the tray.

Insert a SIM card eject tool, a SIM eject bit or a straightened paper clip into the hole on the SIM tray located at the left side of the phone.

Press firmly to eject the tray.

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Step 2

  • Insert an opening pick between the phone assembly and the back cover at the bottom edge of the phone.
  • Slide the opening pick around the bottom right corner to release the clips holding the back cover in place.

Insert an opening pick between the phone assembly and the back cover at the bottom edge of the phone.

Slide the opening pick around the bottom right corner to release the clips holding the back cover in place.

Step 3

  • Insert a second opening pick between back cover and the phone assembly at the bottom edge of the phone.
  • Slide the opening pick around the bottom left corner to release the plastic clips holding the back cover in place.

Insert a second opening pick between back cover and the phone assembly at the bottom edge of the phone.

Slide the opening pick around the bottom left corner to release the plastic clips holding the back cover in place.

Step 4

  • Slide the opening pick along the left side of the phone to release the plastic clips on the left side of the back cover.

Slide the opening pick along the left side of the phone to release the plastic clips on the left side of the back cover.

Step 5

  • Slide the opening pick along the right side of the phone to release the plastic clips on the right side of the back cover.

Slide the opening pick along the right side of the phone to release the plastic clips on the right side of the back cover.

Step 6

              Remove Back Cover
  • The flex cable of the fingerprint sensor is very short and the sensor is likely to disconnect itself during the following removal procedure. Avoid damaging the cable by removing the back cover too quickly.
  • Carefully lift the phone assembly out of the back cover.
  • During reassembly, this is a good point to power on your phone and test all functions before reinstalling the back cover. Be sure to power your phone back down completely before you continue working.

The flex cable of the fingerprint sensor is very short and the sensor is likely to disconnect itself during the following removal procedure. Avoid damaging the cable by removing the back cover too quickly.

Carefully lift the phone assembly out of the back cover.

During reassembly, this is a good point to power on your phone and test all functions before reinstalling the back cover. Be sure to power your phone back down completely before you continue working.

Step 7

              Unfasten Motherboard Cover
  • Remove the seven Phillips #00 screws (3.9 mm length).

Remove the seven Phillips #00 screws (3.9 mm length).

Step 8

              Remove Motherboard Cover
  • Insert the tip of an opening pick underneath the top edge of the motherboard cover.
  • Use the opening pick to pry up the motherboard cover.
  • Remove the motherboard cover.

Insert the tip of an opening pick underneath the top edge of the motherboard cover.

Use the opening pick to pry up the motherboard cover.

Remove the motherboard cover.

Step 9

              Battery Disconnect
  • Use the flat end of a spudger to pry up and disconnect the battery flex cable.

Use the flat end of a spudger to pry up and disconnect the battery flex cable.

Step 10

              Display Cable Disconnect
  • Use the flat end of a spudger to pry up and disconnect the display flex cable.

Use the flat end of a spudger to pry up and disconnect the display flex cable.

Step 11

              Interconnect Cable Disconnect
  • Use the flat end of a spudger to pry up and disconnect the interconnect flex cable.
  • Fold both cables to the bottom edge of the phone in order to have free access to the battery.

Use the flat end of a spudger to pry up and disconnect the interconnect flex cable.

Fold both cables to the bottom edge of the phone in order to have free access to the battery.

Step 12

              Soften Battery Adhesive
  • Apply a heated iOpener to the screen to loosen the adhesive beneath the battery. Apply the iOpener for at least two minutes.

Apply a heated iOpener to the screen to loosen the adhesive beneath the battery. Apply the iOpener for at least two minutes.

Step 13

              Pry up the Battery
  • Try your best not to deform the battery during the following removal process. Soft-shell lithium-ion batteries can leak dangerous chemicals, catch fire, or even explode if damaged. Do not use excessive force or pry at the battery with metal tools.
  • Insert a spudger into the gap between the daughterboard cover and the battery at the bottom left corner of the battery.
  • Use the spudger to pry up the battery until you created a small gap underneath.
  • Slide a plastic or playing card into the gap you created with the spudger.

Try your best not to deform the battery during the following removal process. Soft-shell lithium-ion batteries can leak dangerous chemicals, catch fire, or even explode if damaged. Do not use excessive force or pry at the battery with metal tools.

Insert a spudger into the gap between the daughterboard cover and the battery at the bottom left corner of the battery.

Use the spudger to pry up the battery until you created a small gap underneath.

Slide a plastic or playing card into the gap you created with the spudger.

Step 14

              Cut Battery Adhesive
  • Slide the plastic card underneath the battery and use it to cut the adhesive.
  • Use the plastic card to pry up the battery.

Slide the plastic card underneath the battery and use it to cut the adhesive.

Use the plastic card to pry up the battery.

Step 15

              Remove Battery
  • Remove the battery.
  • Do not reinstall a damaged or deformed battery, as doing so is a potential safety hazard.
  • Before adhering the battery, temporarily reconnect it to help align it correctly. Adhere the battery to the phone and then disconnect it and continue reassembling your phone.

Remove the battery.

Do not reinstall a damaged or deformed battery, as doing so is a potential safety hazard.

Before adhering the battery, temporarily reconnect it to help align it correctly. Adhere the battery to the phone and then disconnect it and continue reassembling your phone.

If possible, turn on your device and test your repair before installing new adhesive and resealing.

Secure the new battery with pre-cut adhesive or double-sided adhesive tape. In order to position it correctly, apply the new adhesive into the device at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.

To reassemble your device, follow these instructions in reverse order. Apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

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                    Dominik Schnabelrauch

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venomavenger443 - Dec 26, 2020

Reply

Nicely explained Excellent work…. Nice job guys…

Mitch Paris - Jul 30, 2022

Reply

Where can I purchase a genuine Samsung battery for the M32?

oof - Sep 1, 2022

Reply

there’s a gasket on the speaker connection to the back that’s real easy to damage at step 2

oof - Sep 1, 2022

sound leaks into the case without it, if you don’t have the exact battery from samsung down to the tenth of a mm thickness the back resonates, there are no replacements (and midframe replacements don’t come with it)