Samsung Galaxy S21 Ultra Usb C Charging Port And Daughterboard Replacement Repair Guide

OEM Guide

Difficulty

Moderate

Steps

Time Required

                          30 minutes - 1 hour

Sections

Back Cover
7 steps
NFC Antenna & Charging Coil
7 steps
Interconnect Cables
3 steps
USB-C Charging Port and Daughterboard
3 steps

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Provided Hardware

A manufacturer provided iFixit with this device or component.

OEM Guide

iFixit collaborated with the manufacturer to make this guide.

BackSamsung Galaxy S21 Ultra
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Introduction

Before you begin, refer to the Samsung Self-Repair document for safety information.

Note: Retaining water resistance after the repair will depend on how well you reapply the adhesive, but your device will lose its IP (Ingress Protection) rating.

What you need

Step 1

              Heat the back cover

Unplug and power off your phone before you begin.
Prepare an iOpener and apply it to the back cover for at least three minutes to loosen the adhesive underneath.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

Unplug and power off your phone before you begin.

Prepare an iOpener and apply it to the back cover for at least three minutes to loosen the adhesive underneath.

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

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Step 2

              Insert an opening pick

Secure a suction handle to the bottom edge of the back cover, as close to the edge as possible.
If the back cover is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the broken cover.
Lift the back cover with the suction handle to create a small gap between the back cover and the frame.
If you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.
Insert an opening pick into the gap you created.
Slide the opening pick to the bottom left corner to slice the adhesive.
Leave the opening pick in place to prevent the adhesive from resealing.

Secure a suction handle to the bottom edge of the back cover, as close to the edge as possible.

If the back cover is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the broken cover.

Lift the back cover with the suction handle to create a small gap between the back cover and the frame.

If you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.

Insert an opening pick into the gap you created.

Slide the opening pick to the bottom left corner to slice the adhesive.

Leave the opening pick in place to prevent the adhesive from resealing.

Step 3

              Slice the adhesive

Insert a second opening pick at the bottom edge of your phone.
Slide the opening pick to the bottom right corner to slice the adhesive.
Leave the opening picks in place to prevent the adhesive from resealing.

Insert a second opening pick at the bottom edge of your phone.

Slide the opening pick to the bottom right corner to slice the adhesive.

Leave the opening picks in place to prevent the adhesive from resealing.

Step 4

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for two to three minutes to reheat it.
Insert a third opening pick at the bottom right corner of your phone.
Slide the opening pick along the right edge of your phone to slice the adhesive.
Leave the opening pick in the top right corner to prevent the adhesive from resealing.

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for two to three minutes to reheat it.

Insert a third opening pick at the bottom right corner of your phone.

Slide the opening pick along the right edge of your phone to slice the adhesive.

Leave the opening pick in the top right corner to prevent the adhesive from resealing.

Step 5

When you slice near the camera assembly, insert only the tip of the opening pick (~ 4-5 mm) to avoid damaging or smearing the camera.
Insert a fourth opening pick underneath the top right corner of your phone.
Slide the opening pick along the top edge to slice the adhesive.
Leave the opening pick in the top left corner to prevent the adhesive from resealing.

When you slice near the camera assembly, insert only the tip of the opening pick (~ 4-5 mm) to avoid damaging or smearing the camera.

Insert a fourth opening pick underneath the top right corner of your phone.

Slide the opening pick along the top edge to slice the adhesive.

Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Step 6

Insert a fifth opening pick underneath the top left corner.
Slide the opening pick along the left edge of the back cover to slice the remaining adhesive.
When you slice near the power button, insert only the tip of the opening pick (~ 3-4 mm) to avoid damaging the power and volume button flex cable.

Insert a fifth opening pick underneath the top left corner.

Slide the opening pick along the left edge of the back cover to slice the remaining adhesive.

When you slice near the power button, insert only the tip of the opening pick (~ 3-4 mm) to avoid damaging the power and volume button flex cable.

Step 7

              Remove the back cover

Remove the back cover.
During reassembly:
This is a good point to power on your phone and test all functions before sealing it up. Be sure to power your phone back down completely before you continue working.
Remove any adhesive chunks with a pair of tweezers or your fingers. Apply heat if you’re having trouble separating the adhesive.
If you’re using Samsung custom-cut adhesives, follow this guide.
If you’re using double-sided tape, follow this guide.

Remove the back cover.

During reassembly:

This is a good point to power on your phone and test all functions before sealing it up. Be sure to power your phone back down completely before you continue working.

Remove any adhesive chunks with a pair of tweezers or your fingers. Apply heat if you’re having trouble separating the adhesive.

If you’re using Samsung custom-cut adhesives, follow this guide.

If you’re using double-sided tape, follow this guide.

Step 8

              Slice the adhesive

Insert an opening pick underneath the left bottom end of the NFC antenna and charging coil assembly.
Carefully slide the opening pick along the bottom left edge of the assembly to separate it from the battery.

Insert an opening pick underneath the left bottom end of the NFC antenna and charging coil assembly.

Carefully slide the opening pick along the bottom left edge of the assembly to separate it from the battery.

Step 9

              Disconnect the charging coil

Use a spudger to disconnect the charging coil by prying the connector straight up from its socket.

Use a spudger to disconnect the charging coil by prying the connector straight up from its socket.

Step 10

              Disconnect the NFC antenna

Use a spudger to disconnect the NFC antenna by prying the connector straight up from its socket.

Use a spudger to disconnect the NFC antenna by prying the connector straight up from its socket.

Step 11

              Unfasten the NFC antenna & charging coil assembly

Use a Phillips screwdriver to remove the five 3.9 mm-long screws securing the NFC antenna and charging coil assembly.
If you’re reassembling with the Samsung Self-Repair kit, be sure to replace the screws with new ones labeled #3427.

Use a Phillips screwdriver to remove the five 3.9 mm-long screws securing the NFC antenna and charging coil assembly.

If you’re reassembling with the Samsung Self-Repair kit, be sure to replace the screws with new ones labeled #3427.

Step 12

              Unfasten the loudspeaker

Use a Phillips screwdriver to remove the four 3.9 mm-long screws securing the loudspeaker assembly.
If you’re reassembling with the Samsung Self-Repair kit, be sure to replace the screws with new ones labeled #3427.

Use a Phillips screwdriver to remove the four 3.9 mm-long screws securing the loudspeaker assembly.

Step 13

              Disconnect the loudspeaker

Insert the tip of a spudger between the frame and the upper-left notch in the loudspeaker.
Pry up with the spudger to release the loudspeaker from its plastic clips.

Insert the tip of a spudger between the frame and the upper-left notch in the loudspeaker.

Pry up with the spudger to release the loudspeaker from its plastic clips.

Step 14

              Remove the NFC antenna & charging coil assembly

Use a pair of tweezers or your fingers to carefully remove the NFC antenna, charging coil, and loudspeaker assembly.
Set the assembly aside. You’ll reuse it during reassembly.

Use a pair of tweezers or your fingers to carefully remove the NFC antenna, charging coil, and loudspeaker assembly.

Set the assembly aside. You’ll reuse it during reassembly.

Step 15

              Disconnect the interconnect cables

Use a spudger to pry up and disconnect the primary and secondary interconnect cables’ press connectors on the motherboard.

Use a spudger to pry up and disconnect the primary and secondary interconnect cables’ press connectors on the motherboard.

Step 16

              Remove the secondary interconnect cable

Use a spudger to disconnect the secondary interconnect cable from the daughterboard by prying its bottom connector straight up from its socket.
Use your fingers or a pair of tweezers to carefully remove the secondary interconnect cable.
Set the cable aside. You’ll reuse it during reassembly.

Use a spudger to disconnect the secondary interconnect cable from the daughterboard by prying its bottom connector straight up from its socket.

Use your fingers or a pair of tweezers to carefully remove the secondary interconnect cable.

Set the cable aside. You’ll reuse it during reassembly.

Step 17

              Remove the primary interconnect cable

Use a spudger to disconnect the primary interconnect cable from the daughterboard by prying its bottom connector straight up from its socket.
Use your fingers or a pair of tweezers to carefully remove the primary interconnect cable.
Set the cable aside. You’ll reuse it during reassembly.

Use a spudger to disconnect the primary interconnect cable from the daughterboard by prying its bottom connector straight up from its socket.

Use your fingers or a pair of tweezers to carefully remove the primary interconnect cable.

Step 18

              Unfasten the charging board

Use a Phillips screwdriver to remove the three 3.4 mm-long screws securing the charging board.
If you’re reassembling with the Samsung Self-Repair kit, be sure to replace the screws with new ones labeled #3428.

Use a Phillips screwdriver to remove the three 3.4 mm-long screws securing the charging board.

If you’re reassembling with the Samsung Self-Repair kit, be sure to replace the screws with new ones labeled #3428.

Step 19

              Pry up the charging board

Insert the pointed end of a spudger underneath the left edge of the charging board next to the main flex cable connector.
Use your spudger to pry up the charging board.

Insert the pointed end of a spudger underneath the left edge of the charging board next to the main flex cable connector.

Use your spudger to pry up the charging board.

Step 20

              Remove the charging board

Use a pair of blunt tweezers or your fingers to remove the charging board. Start by lifting its top edge up and then carefully slide the USB-C connector out of its recess.

Use a pair of blunt tweezers or your fingers to remove the charging board. Start by lifting its top edge up and then carefully slide the USB-C connector out of its recess.

To reassemble your device, follow the instructions in reverse order and perform the opposite actions, e.g., “reattach” instead of “removing.” Skip steps that use heating and prying, and pay close attention to the 📌 bullets as you work through the steps.

After you’ve completed the repair, download the Samsung Members App from the Galaxy Store or the Play Store, and follow the Samsung Self-Repair document (beginning page 10) to make sure your device is fully functional.

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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                                                                                      2 other people completed this guide.

Author

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                    Alex Diaz-Kokaisl

Member since: 01/16/2022

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Rahul Manayath - Sep 27, 2022

Hi,

One month ago I dropped my phone in pool and I took it to the service center where they have dried out the phone. Everything was working fine but later only I was able to find out that the primary microphone is not working and also sim doesn’t get detect. So couple of times I did resetting the phone pressing the volume down and power button and that fixed the SIM related issue. After couple of weeks again there was an error saying SIM can’t be detected and I tried the same solution , after several attempts it detected again. Then again after two days the issue pops up once again. So I was able to find out that primary microphone and SIM card slot is in the same daughter board and thought of replacing it by myself. I got the new board and replaced it yesterday and still my microphone is not working. What would be the solution ? Is there anything I need to check/replace further like flex cables and all ? Please advise. Appreciate your help.

Thanks

Alex Diaz-Kokaisl - Sep 28, 2022

Hi Rahul!

If your speaker still isn’t working after you replaced your daughterboard, then I would suggest replacing the loudspeaker itself. Unfortunately, we don’t sell the loudspeaker currently, so you would have to find it from a different source. I wish you the best of luck in your repair!

shexi_rudeboi_jmz - Nov 4, 2022

Everytime i put my phone on charge sometimes it works fine but if i take it out and put it back in again it keeps coming up with the moisture detected but theres no water inside there i dried it out and left it alone but before i didnt realise my lead was a little wet would that cause i massive problem charging

Blaze Long - Dec 7, 2022

The tools kit for this job is inadequate you’re better off saving your money and getting the correct one’s. The gel heat pad doesn’t produce enough heat to loosen the adhesive. The suction cup is worthless as it just pulls right off pretty easily. And the included picks are just not thin enough to slide in. I tried setting the gel heat pad on just the bottom edge to try and put as much heat as possible and then tried to get the pick into there but all that happened was the back glass started to shatter. So now I’ve got to buy a new back glass piece. You’ll need to use a heat gun or hair dryer, find a strong suction cup and some kind of thin enough blade/tool to get in there. I’d make future purchases from IFIXIT if they’d just say hey get and use these tools instead of selling a kit that doesn’t work just wasting their customers money.

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Provided Hardware

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What you need

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