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Samsung Galaxy S21 Ultra Charging Port Repair

Charging Port Repair guide for the Samsung Galaxy S21 Ultra

Moderate
~42 min
24 steps

Before you begin

Tools

  • Heat gun or hair dryer
  • Suction cup tool
  • Plastic prying tools
  • Phillips #00 screwdriver
  • Spudger tool
  • Tweezers
  • SIM eject tool

Parts / materials

  • Replacement Samsung Galaxy S21 Ultra USB-C daughterboard
  • Pre-cut rear glass adhesive gasket
  • Isopropyl alcohol (99%)

Safety

  • Wear eye protection when working with glass tools to avoid eye damage from potential splinters.
  • Disconnect the battery before touching internal connectors to prevent short circuits.
  • Do not heat the rear panel beyond 80°C (176°F) to avoid damaging the internal lithium-ion battery.

Overview

# Samsung Galaxy S21 Ultra Charging Port Repair Repair Guide Action-specific charging port repair walkthrough for the Samsung Galaxy S21 Ultra. About 42 minutes across 24 steps. This DIY guide walks through charging port repair on the Samsung Galaxy S21 Ultra (Galaxy S series phone). Before you open the device, confirm the exact model number on the Samsung settings screen or rear housing so your replacement part matches the Galaxy S21 Ultra specifically—not a similar Galaxy S sibling. Most DIY techs finish this Samsung Galaxy S21 Ultra charging port repair in about 42 minutes when parts and tools are ready. Difficulty is rated intermediate for this model. Recommended tools for this Samsung Galaxy S21 Ultra job: Heat gun or hair dryer, Suction cup tool, Plastic prying tools, Phillips #00 screwdriver, Spudger tool, Tweezers, SIM eject tool. Parts and supplies: Replacement Samsung Galaxy S21 Ultra USB-C daughterboard, Pre-cut rear glass adhesive gasket, Isopropyl alcohol (99%). Power the Galaxy S21 Ultra off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Samsung Galaxy S21 Ultra, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle charging port repair for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Eject the SIM tray

    1 min

    Insert a SIM eject tool into the hole next to the USB-C port on the bottom edge. Push firmly until the tray pops out and slide it out completely.

  2. 2

    Heat the rear glass

    2 min

    Apply a heat gun or hair dryer set to low heat along the outer edges of the back glass for about two minutes to soften the internal adhesive.

  3. 3

    Attach the suction cup

    1 min

    Place a suction cup onto the lower portion of the rear glass near the charging port and press down to seal it.

  4. 4

    Insert an opening pick

    2 min

    Pull up firmly on the suction cup to create a thin gap between the back glass and the frame, then slide a plastic opening pick into the gap.

  5. 5

    Slice the bottom adhesive

    2 min

    Slide the plastic pick back and forth along the bottom edge of the phone to cut through the factory adhesive sealant.

  6. 6

    Slice the side adhesives

    3 min

    Carefully guide the pick along the left and right sides of the rear panel to cut through the perimeter tape.

  7. 7

    Remove the back glass

    1 min

    Lift the rear glass panel straight off the phone body and place it on a clean surface.

  8. 8

    Unscrew the wireless charging coil

    3 min

    Use a Phillips #00 screwdriver to remove the 15 screws securing the wireless charging coil and top plastic bracket.

  9. 9

    Disconnect the battery cable

    1 min

    Gently pry the battery connector press fit header straight up from the motherboard using a plastic spudger.

  10. 10

    Remove the wireless charging pad

    2 min

    Pry up the edges of the wireless charging pad and carefully unpeel it from the internal chassis.

  11. 11

    Unscrew the loudspeaker module

    2 min

    Remove the five Phillips #00 screws holding the loudspeaker assembly at the bottom of the device.

  12. 12

    Remove the loudspeaker

    1 min

    Insert a spudger under the upper ridge of the loudspeaker enclosure and pry it up and out of the phone.

  13. 13

    Disconnect the interconnect flex cables

    1 min

    Use the flat end of a spudger to disconnect both the main ribbon cable and display flex cable from the daughterboard.

  14. 14

    Unscrew the daughterboard

    1 min

    Remove the single Phillips #00 screw holding the charging port daughterboard down to the bottom housing.

  15. 15

    Remove the faulty charging port board

    2 min

    Slide a thin plastic pry tool underneath the daughterboard and lift it out of the lower chassis.

  16. 16

    Insert the new charging port board

    2 min

    Position the new USB-C daughterboard into the lower housing frame, aligning the USB port into the cutout.

  17. 17

    Secure the daughterboard screw

    1 min

    Drive the single Phillips #00 screw into the daughterboard to secure it to the frame.

  18. 18

    Reconnect the interconnect flex cables

    2 min

    Align and press down on the main flex cable and display cable connectors until they click firmly onto the new board.

  19. 19

    Reinstall the loudspeaker

    2 min

    Fit the loudspeaker housing back over the daughterboard area and tighten the five Phillips #00 screws.

  20. 20

    Reconnect the battery cable

    1 min

    Align the battery press connector over its motherboard socket and press down firmly to re-establish power connection.

  21. 21

    Reinstall the wireless charging assembly

    3 min

    Lay the wireless charging coil back in place and replace the 15 Phillips #00 screws across the top bracket.

  22. 22

    Apply new back cover adhesive

    3 min

    Remove old adhesive remnants with isopropyl alcohol, then stick down a new pre-cut adhesive gasket onto the outer perimeter frame.

  23. 23

    Reattach the rear glass

    2 min

    Align the rear cover onto the chassis and press firmly around all edges to bond the glass securely.

  24. 24

    Reinsert the SIM tray

    1 min

    Push the SIM card tray back into its slot on the bottom frame until it sits flush.

After your Samsung Galaxy S21 Ultra charging port repair

Power the Galaxy S21 Ultra back on and test the charging port repair function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S21 Ultra job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.

Keep learning

Explore more Samsung Galaxy S21 Ultra repair context in the encyclopedia, or open related DIY guides.

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