How to disconnect the Interconnect Cables in the Samsung Galaxy S21 Ultra

ID: 149522

Description: This is a prerequisite guide! This guide is...

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.

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.

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.

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.

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.

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 custom-cut adhesives, follow this guide.
If you're using double-sided tape, follow this guide.

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 bottom end of the NFC antenna and charging coil assembly.
Carefully slide the opening pick along the bottom of the assembly to separate it from the loudspeaker.

Use a spudger to disconnect the charging coil 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.

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

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

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

If you're not planning to remove the motherboard or to replace the battery, you can skip this step and continue with the next one.
Use a spudger to disconnect the display flex cable by prying the connector straight up from its socket.

Use a spudger to disconnect the main and interconnect flex cables from the motherboard by prying their upper connectors straight up from their sockets.

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