Teardown difficulty:
Moderate
Duration:
14 min

Recommended tools

Disassembly/Repair of the mobile device Samsung Galaxy A21s SM-A217 with each step description and the required set of tools.


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How to disassemble Samsung Galaxy A21s SM-A217, Step 1/1

Step 1. Before disassembling!

⚠ī¸ī¸ Before disassembling, do not forget to turn your phone off.


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Step 2. Remove the tray

Use the ejection tool (aka Needle) or Paperclip. Push the tip all the way into the hole until the tray ejects, and then pull the tray of SIM and Memory card (Micro SD) out.

⚠ī¸ī¸ Pay attention! The tool must be inserted into a hole on the edge of the phone's housing. Do not press too hard. It may break the tray eject mechanism.


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Step 3. Open the cover

We recommend using a special heating device such as a separator machine, heat gun, or heating mat. It will simplify the process. You can use a home hairdryer, but you will have to make a nozzle by hand or have a suitable one in the kit to gently heat and concentrate the heat flow in the right place.

ℹī¸ī¸ The surface of the back cover must be heated to soften the adhesive underneath. The approximate heating temperature is 50° C / 125° F.

Use a thin plastic film or pick for separation. To facilitate the process, you can use isopropyl alcohol. It is often most difficult to pass the tool between the parts to be divided. Choose the far edge from the FFC cables or buttons.

Do not use a lever or any force for separation that could damage the elements inside.


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Step 4. Remove the fingerprint sensor

If the fingerprint sensor is located on the back cover, we have to pry up the connector and remove the cover.

If the fingerprint sensor remains on the middle cover, we have to unglue the fingerprint sensor body, disconnect the connector, and remove the sensor. 


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Step 5. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 16 screws.

ℹī¸ī¸ Be sure to note the location of the screws before disassembling. When assembling the device, screwing the screw in the wrong place may damage the device or its part. To avoid damage, the removed screws and individual pieces (as gaskets or brackets) must be laid out in the appropriate order, or the screws and their holes in the phone must be marked with colored markers.


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Step 6. Open the middle cover

Pry up the edges. Move an opening tool along the edge, detach the clips, and remove the middle cover with a loudspeaker and antenna pads and tracks. The middle cover protects the printed circuit board (PCB).

Try to lift the cover by the edges and don't push anything too far inside, so as not to accidentally break or short-circuit anything on the circuit board.


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Step 7. Disconnect the battery connector

Disconnect the battery connector as soon as possible.

ℹī¸ī¸ The Samsung Galaxy A21s SM-A217 model has a battery EB-BA217ABY with 4900 mAh capacity (aka rechargeable battery).

⚠ī¸ It is highly recommended to disconnect the connector to avoid possible short circuits during disassembly. Also, try not to use a metal tool to disconnect the rechargeable battery connector or do it carefully.


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Step 8. Remove the inter-board cable

Carefully, preferably from the edge, disconnect the connectors and remove the inter-board cable connecting the mainboard to the daughterboard (also known as the sub-board).

⚠ī¸ī¸ Be careful when removing the cables from the connectors, the cables are pretty thin, and it is easy enough to break them or damage the contact tracks inside.

ℹī¸ī¸ An arrow on the FFC cable (flexible flat cable) indicates its correct position.


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Step 9. Disconnect the connectors

Disconnect the coaxial cable connectors.


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Step 10. Remove the daughterboard

Remove the sub-board. It is glued to the frame with metalized tape, so to facilitate the process, the board can be heated a bit.

ℹī¸ī¸ The board contains a charging port (Micro USB), microphone, headphone jack socket, spring contacts for the speaker, and an antenna unit.

⚠ī¸ It is not necessary to insert the tool under the board when removing the sub-board. Internal components could be damaged.


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Step 11. Remove the rear camera

Disconnect the connector and remove the rear camera.


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Step 12. Remove the front camera

Pry up the connector and remove the front (selfie) camera.


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Step 13. Unscrew one screw

Using a screwdriver (Phillips 1.5 mm PH000), unscrew one screw securing the motherboard.


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Step 14. Remove the motherboard

Carefully remove the printed circuit board. There is no need to use a lever or try to reach the board by force. Make sure that nothing is getting in the way or holding the board.

⚠ī¸ Do not bend the circuit board when removing it or push tools under it. Unbeknownst to yourself, you can damage components or cables from the inside.


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Step 15. Remove the cameras

Pry up the connectors and remove the assembly of three rear cameras.


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Step 16. In the display frame remained

ℹī¸ī¸ In the display frame remained: the earpiece speaker, battery, coaxial cable, and vibration motor.

Detailed disassembly instructions of Samsung Galaxy A21s SM-A217 in the video, made by our mobile repair & service center:

If you have a question, ask us, and we will try to answer in as much detail as possible. If this article was helpful for you, please rate it.


Disassembling\Repair has medium complexity and takes about 14 minutes in time. Our manual is suitable for all models Samsung Galaxy A21s SM-A217 released for markets in different countries.



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