Samsung Galaxy S21 Primary Interconnect Cable Replacement

Power off your phone completely before starting.

• Apply a heated iOpener to the bottom edge of the back cover for 2 minutes.
• Alternative methods:
• A hair dryer, heat gun, or hot plate can also be used.

Avoid overheating, as display, battery, and plastic back cover may be damaged.

Apply a suction cup to the back of the phone, near the center of the bottom edge.

• Pull up on the suction cup with strong, steady force to create a gap between the back cover and frame.
• If having trouble, apply more heat to the edge and try again. Be aware that older phones may be more difficult to access.

Only insert an opening pick up to 5 mm to avoid damaging internal components.

Hold the pick against the edge and slide it back and forth.

Do not remove the pick as this can cause the adhesive to seal again.

Apply a iOpener to the back cover's left edge and heat it for 2 minutes.

Apply a suction cup to the phone's back near the center of the left edge.

• Pull up on the suction cup with strong, steady force to create a gap between the back cover and frame.
• Insert an opening pick into the gap, but only go up to 5 mm to avoid damaging internal components.

Do not cut past the camera area — risk of cracking the plastic.

• Slide an opening pick along the left edge towards the bottom left corner to separate the adhesive.
• Leave the opening pick in place to prevent re-adhesion.

Apply a iOpener to the right edge of the back cover and heat it for 2 minutes.

Apply a suction cup to the phone's back near the center of the right edge.

• Pull up on the suction cup with strong, steady force to create a gap between the back cover and frame.
• Insert an opening pick into the gap, but only for 3 mm or less to avoid damaging the secondary interconnect cable.

Insert an opening pick into the right edge of the back cover and slide it back and forth to separate the adhesive.

Do not remove the pick, as this can cause the adhesive to reseal.

Insert opening pick into top-right corner of phone.

Only insert up to 5 mm to avoid damaging internal components.

• Apply same procedure to other corners (except top-left, where rear-facing camera is located).

Position the top-most opening pick nearest to the camera shell.

• Repeat with the left-edge pick, moving it as close to the camera shell as possible.

Apply the iOpener to the camera shell for 2 minutes, allowing it to heat up.

Rotate the back cover counterclockwise until a gap forms between the camera shell and the frame.

Only insert the opening pick up to 5 mm to avoid scratching the camera lens.

• Insert an opening pick into the gap.
• If this method is unsuccessful, proceed to the next step for an alternative approach; otherwise, skip the next step.

Careful: risk of cracking the plastic back cover.

• Slide two picks toward the camera shell, positioning them under the corners of the back cover.
• Movethe picks along the bridge between the back cover and camera shell, creating a gap.

• Insert an opening pick between the camera shell and the .
• Cut the adhesive using the opening pick.

Multiple rounds of heating may be required to loosen the strong adhesive.

Remove excess adhesive to the right of the camera using your tool.

• Be cautious of the plate around the flash on the back cover.
• Avoid getting the pick stuck.
• Angle the pick downward to prevent damage.

Align the opening pick's tip with your phone's flash.

Be cautious not to insert the pick into the flash's plate, as it can have a resistance similar to adhesive.

• Slowly insert the pick, angling it downward to prevent slipping into the plate.
• Target the adhesive to the right of the camera and slice through it carefully.

Remove the back cover.

• If it remains stuck, slide a pick around the edges until separation is complete.

Power on your phone and test all functions before resealing; ensure you power it down completely after testing.

• Remove any adhesive chunks with tweezers or fingers.
• Wipe away residue with high concentration (over 90%) isopropyl alcohol.

For Samsung custom-cut adhesives, refer to the specific guide. For double-sided tape, follow its corresponding instructions.

Remove the motherboard bracket by unscrewing its five Phillips screws, which are 4 mm long.

Label or keep track of each screw and ensure they are replaced in their original positions to avoid any damage or complications during reassembly.

Do not completely remove the motherboard bracket yet.

• Use a pair of tweezers to gently pull up and unclip the motherboard bracket from the frame.
• The wireless charging coil is still attached to the bracket, so proceed with caution.

Careful prying: risk of damaging socket or surrounding components.

• Hold motherboard bracket out of way with tweezers or fingers.
• Pry up battery press connector using a spudger, careful to lift only edge of connector.

Re-attachment: never press middle, or risk bending pins and permanent damage.

• Carefully align press connector, then click into place on one side.
• Repeat process for other side. Do not press down on middle of connector.

Use a spudger to pry up the wireless charging coil's press connector.

Remove the wireless charging coil by gently peeling it away from the phone with your fingers.

• During reassembly, start by refastening the motherboard bracket screws.
• Firmly press the wireless charging coil down to adhere it once properly aligned.

Remove the six 4 mm screws using a Phillips screwdriver.

Locate the notch at the top-left corner of the loudspeaker.

• Use a sharp tool, such as a pointed spudger, to carefully pry up the loudspeaker clips.

• Once released, gently lift out the loudspeaker.

Use the flat end of a spudger to gently pry up and release the bottom press connector on the primary interconnect cable.

Insert the flat end of a spudger into the primary interconnect cable's top press connector.

• Pry gently until the connector releases.
• Disconnect the cable from the motherboard.

Remove the primary interconnect cable using either tweezers or your fingers.