Samsung Galaxy S21 Ultra USB-C Charging Port and Daughterboard Replacement

Insert a SIM eject tool, bit, or straightened paper clip into the SIM card tray hole on the top edge of the phone.

• Press the SIM eject tool into the SIM card tray hole to eject the SIM card tray.
• Remove the SIM card tray.

If you accidentally inserted the SIM eject tool into a microphone hole, it's likely undamaged.

Unplug your phone and power it off before starting.

Use a iOpener for at least 3 minutes on the back cover to loosen the adhesive.

• Alternatively, use a hair dryer, heat gun, or hot plate.
• Be cautious not to overheat the phone, as the display and internal battery are sensitive to heat damage.

Attach a suction handle to the back cover's lower edge, near the edge.

Apply clear packing tape over cracked areas if necessary for suction cup adhesion.

• Lift the back cover with the suction handle to create a small gap between it and the frame.
• If no gap forms, apply more heat to soften the adhesive; refer to iOpener instructions for overheating precautions.

Insert an opening pick into the created gap.

Slide the opening pick towards the bottom left corner to break the adhesive bond.

Leave the opening pick in place to prevent re-adhesion of the adhesive.

Insert another opening pick along the bottom edge.

• Push it towards the bottom right corner, slicing through the adhesive.
• Don't remove them; let the opening picks stay in place to keep the adhesive open.

Adhesive may cool down, preventing easy cutting.

• Use iOpener for 2-3 minutes to reheat the adhesive.
• Insert a third opening pick at the bottom right corner of your phone.
• Slide the opening pick along the right edge, slicing the adhesive.
• Leave the opening pick in place (top right corner) to prevent resealing.

When slicing near the camera assembly, use only a small tip (~ 4-5 mm) of the opening pick to avoid damage.

• Insert another opening pick under the top right corner of your phone.

• Slide this opening pick along the top edge to slice the adhesive.
• Leave one opening pick in the top left corner to prevent resealing.

Insert a 5th opening pick under the top left corner.

• Slide the pick along the left edge to slice remaining adhesive.

When near the power button, only insert 3-4 mm of the pick tip to avoid damaging the flex cable.

Remove the back cover.

Power on your phone and test all functions before sealing it up — ensure complete shutdown prior to continuing work.

• Use tweezers or fingers to remove any adhesive chunks, applying heat if necessary for separation.
• If using custom-cut adhesives, follow the dedicated guide.
• If using double-sided tape, follow the respective guide.

Be careful not to damage the NFC antenna and charging coil assembly.

• Insert an opening pick underneath the left bottom end of the NFC antenna and charging coil assembly.
• Slide the opening pick along the bottom left edge of the assembly, separating it from the battery.

Disconnect the charging coil using a spudger. Pry the connector straight up from its socket.

Disconnect the NFC antenna connector by gently prying it straight up using a spudger.

• Use a Phillips screwdriver to remove 5 screws, each 3.9mm long.

Remove the loudspeaker assembly's screws using a Phillips screwdriver.

• Four 3.9 mm-long screws will be removed.

Insert the tip of a spudger into the upper-left notch of the loudspeaker.

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

Remove the NFC antenna, charging coil, and loudspeaker assembly using a pair of tweezers or your fingers.

• Place the removed components aside for later reinstallation.

Disconnect the primary and secondary interconnect cables from the motherboard using a spudger.

Disconnect the secondary interconnect cable's bottom connector straight up from its socket using a spudger.

• Pull out the secondary interconnect cable using your fingers or tweezers, taking care not to damage it.
• Set the cable aside for reassembly later.

Disconnect the primary interconnect cable from the daughterboard:

• Use a spudger to pry its bottom connector straight up from its socket.
• Then, carefully remove the cable using your fingers or a pair of tweezers.
• Set it aside for reuse during reassembly.

Remove the charging board screws with a Phillips screwdriver.

• The screws are 3.4 mm long.
• There are three screws in total.

Position the spudger under the left edge of the charging board, near the main flex cable connector.

• Pry up the charging board with a gentle pushing motion.

• Remove the charging board using either blunt tweezers or your fingers.
• Lift the charging board's top edge upwards.

• Carefully slide the USB-C connector out of its recess.