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Featured Guide

Difficulty

Moderate

Steps

19

Time Required

                          45 minutes - 1 hour

Sections

4

  • SIM Card Tray
  • 1 step
  • How To Unclip The Back Cover On The Xiaomi Poco M3
  • 8 steps
  • How To Remove The Motherboard Cover In Your Xiaomi Poco M3
  • 3 steps
  • Battery
  • 7 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

              SIM Card tray removal
  • Insert a SIM card eject tool or a paperclip into the small hole in the SIM card tray, located near the top left corner of the Poco M3.
  • Press firmly to eject the SIM card tray.
  • Remove the SIM card tray from the phone by pulling it out of the phone assembly.
  • If the tray holds a SIM card it will fall out easily.
  • When reinserting the SIM card, make sure it’s in the correct orientation inside the SIM card tray.
  • A thin rubber gasket around the SIM card tray provides water and dust protection. If this gasket is damaged or missing, replace the gasket or the entire SIM card tray to protect your Poco M3’s internal components.

Insert a SIM card eject tool or a paperclip into the small hole in the SIM card tray, located near the top left corner of the Poco M3.

Press firmly to eject the SIM card tray.

Remove the SIM card tray from the phone by pulling it out of the phone assembly.

If the tray holds a SIM card it will fall out easily.

When reinserting the SIM card, make sure it’s in the correct orientation inside the SIM card tray.

A thin rubber gasket around the SIM card tray provides water and dust protection. If this gasket is damaged or missing, replace the gasket or the entire SIM card tray to protect your Poco M3’s internal components.

1024

Step 2

              Insert a spudger
  • Insert a spudger into the charging port at a steep angle.
  • Do not insert the spudger in a flat angle like you would do with a charging cable to avoid damaging the charging port.
  • Use the spudger to create a gap between the phone assembly and the back cover by prying the back cover away from the bottom edge of the screen.

Insert a spudger into the charging port at a steep angle.

Do not insert the spudger in a flat angle like you would do with a charging cable to avoid damaging the charging port.

Use the spudger to create a gap between the phone assembly and the back cover by prying the back cover away from the bottom edge of the screen.

Step 3

              Insert an opening pick
  • Insert an opening pick into the gap between the phone assembly and the back cover.
  • Remove the spudger.

Insert an opening pick into the gap between the phone assembly and the back cover.

Remove the spudger.

Step 4

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

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

Slide the opening pick around the bottom left corner.

Step 5

  • Slide the opening pick along the left edge of the Poco M3 to release the plastic clips.

Slide the opening pick along the left edge of the Poco M3 to release the plastic clips.

Step 6

  • Slide the opening pick around the top left corner to release the plastic clips.
  • Slide the opening pick along the top edge of the phone to release the plastic clips holding the back cover in place.

Slide the opening pick around the top left corner to release the plastic clips.

Slide the opening pick along the top edge of the phone to release the plastic clips holding the back cover in place.

Step 7

  • Slide the opening pick around the top right corner to release the plastic clips.
  • Leave the opening pick inserted above the volume buttons.
  • Avoid using your opening pick in the area where the physical buttons are located. There’s a flex cable running to the motherboard which can be easily torn.

Slide the opening pick around the top right corner to release the plastic clips.

Leave the opening pick inserted above the volume buttons.

Avoid using your opening pick in the area where the physical buttons are located. There’s a flex cable running to the motherboard which can be easily torn.

Step 8

  • Insert another opening pick into the gap at the bottom edge of your phone.
  • Slide the opening pick around the bottom right corner to release the plastic clips securing the back cover.
  • Slide the opening pick along the right edge of the phone to release the remaining plastic clips. Stop just below the fingerprint reader.

Insert another opening pick into the gap at the bottom edge of your phone.

Slide the opening pick around the bottom right corner to release the plastic clips securing the back cover.

Slide the opening pick along the right edge of the phone to release the remaining plastic clips. Stop just below the fingerprint reader.

Step 9

  • Remove the opening picks and flip the phone over.
  • Open up the phone by swinging the back cover up from the right side, like the front cover of a book.
  • Avoid tensioning the fingerprint flex cable during this procedure.

Remove the opening picks and flip the phone over.

Open up the phone by swinging the back cover up from the right side, like the front cover of a book.

Avoid tensioning the fingerprint flex cable during this procedure.

Step 10

              Unfasten the screws
  • Use a Phillips #00 screwdriver to remove the ten 3.9 mm-long screws.

Use a Phillips #00 screwdriver to remove the ten 3.9 mm-long screws.

Step 11

              Pry up the motherboard cover
  • Slide an opening pick under the bottom right corner of the motherboard cover.
  • Slide the opening pick along the right edge of the motherboard cover to release the plastic clips holding it in place.
  • At the top right corner, twist the opening pick countercockwise to pry up the motherboard cover.

Slide an opening pick under the bottom right corner of the motherboard cover.

Slide the opening pick along the right edge of the motherboard cover to release the plastic clips holding it in place.

At the top right corner, twist the opening pick countercockwise to pry up the motherboard cover.

Step 12

              Remove the motherboard cover
  • Remove the motherboard cover.

Remove the motherboard cover.

Step 13

              Disconnect the fingerprint sensor cable
  • Use the flat end of a spudger to pry up and disconnect the fingerprint sensor cable at the bottom left corner of the motherboard.
  • Remove the back cover assembly.

Use the flat end of a spudger to pry up and disconnect the fingerprint sensor cable at the bottom left corner of the motherboard.

Remove the back cover assembly.

Step 14

              Disconnect the battery cable
  • Use the flat end of a spudger to pry up and disconnect the battery cable at the bottom right corner of the motherboard.

Use the flat end of a spudger to pry up and disconnect the battery cable at the bottom right corner of the motherboard.

Step 15

              Peel the "A" pull tab off the battery
  • Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a thermal event.
  • Use a pair of blunt nose tweezers or a clean fingernail to peel the top edge of the orange adhesive strip labeled with an A off the battery.
  • Use a pair of blunt nose tweezers or a clean fingernail to peel the bottom edge of the orange adhesive strip labeled with an A off the battery.
  • Fold down the adhesive strip labeled with an A.

Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a thermal event.

Use a pair of blunt nose tweezers or a clean fingernail to peel the top edge of the orange adhesive strip labeled with an A off the battery.

Use a pair of blunt nose tweezers or a clean fingernail to peel the bottom edge of the orange adhesive strip labeled with an A off the battery.

Fold down the adhesive strip labeled with an A.

Step 16

              Peel the "B" pull tab off the battery
  • Use a pair of blunt nose tweezers or a clean fingernail the orange adhesive strip labeled with a B off the battery.

Use a pair of blunt nose tweezers or a clean fingernail the orange adhesive strip labeled with a B off the battery.

Step 17

              Lift the battery out of its recess
  • Grab both corners of the orange adhesive strip labeled with an A.
  • Pull upwards to lift the battery out of its recess and swing it to an upright position.
  • Although these adhesive tabs are supposed to make the battery removal easier, they may require some force. If you’re having trouble removing the battery, you can apply a heated iOpener to the center of the display to loosen the adhesive underneath.

Grab both corners of the orange adhesive strip labeled with an A.

Pull upwards to lift the battery out of its recess and swing it to an upright position.

Although these adhesive tabs are supposed to make the battery removal easier, they may require some force. If you’re having trouble removing the battery, you can apply a heated iOpener to the center of the display to loosen the adhesive underneath.

Step 18

              Remove the battery
  • Peel the battery off the remaining adhesive.
  • Remove the battery.
  • During reassembly, temporarily reconnect the battery to the motherboard to help align it correctly. Disconnect the battery after it is seated.

Peel the battery off the remaining adhesive.

Remove the battery.

During reassembly, temporarily reconnect the battery to the motherboard to help align it correctly. Disconnect the battery after it is seated.

Step 19

              Remove the adhesive sticker
  • Peel the battery’s adhesive sticker off the midframe.
  • This step is mandatory if you are replacing the display. It is highly recommended to use a fresh adhesive sticker when installing a new battery.

Peel the battery’s adhesive sticker off the midframe.

This step is mandatory if you are replacing the display. It is highly recommended to use a fresh adhesive sticker when installing a new battery.

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, after completing this guide, calibrate your newly installed battery. 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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