Teardown difficulty:
Easy
Duration:
13 min

Recommended tools

Disassembly of the mobile device ZTE Blade 20 Smart with each step description and the required set of tools.

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How to disassemble ZTE Blade 20 Smart, Step 1/1

Step 1. Before disassembling!

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


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Step 2. Remove the tray

Use the Key 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.

⚠️ 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 back cover

Using a spudger or a plastic pick, carefully, around the edge, detach the back cover clips, and remove it.

Do not insert the tool deeply or bend it. Otherwise, the housing may be tampered with or damaged.

⚠️ Be careful when opening the cover from the volume and power buttons side. Thin cable and fragile buttons are straightforward to damage.

⚠️ Pay attention to the fingerprint sensor cable glued to the back cover from the inside.


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Step 4. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 10 screws.


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Step 5. Open the cover

Open the cover with antennas that protect the printed circuit board (PCB).

Try to lift the covers by the edges and not push anything between them to not accidentally touch or short-circuit anything on the PCB.

ℹ️️ On the upper cover, you can see the metalized coating on the plastic in the form of tracks and contact pads. These are Wi-Fi, Bluetooth, and GPS antennas.

⚠️ Try not to break the fingerprint sensor cable that goes through the hole in the cover and connects to the PCB.


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Step 6. Disconnect the connector

Disconnect the fingerprint sensor connector and remove covers.


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Step 7. Disconnect the connectors

Pry up the connectors of the display module cable, inter-board cable, battery, and coaxial cable.

Disconnect the battery connector as soon as possible.

ℹ️️ The ZTE Blade 20 Smart model has a battery Li3949T44P8h906450 with 5000 mAh capacity (aka rechargeable battery).

⚠️ 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. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 8 screws.


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Step 9. Remove the loudspeaker

Remove the loudspeaker assembly with antennas.


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Step 10. Disconnect the connectors

Disconnect the coaxial cable connector, cables to the mainboard, on the daughterboard.

⚠️ Do not pull on the cable or pry it with a sharp tool, the connectors are pretty weak and break easily, or the cable falls out of the end (lug).


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Step 11. 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.

ℹ️️ The board contains a charging port (Micro USB), microphone, vibration motor, spring contacts for the speaker, and an antenna unit.

⚠️ 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 12. Remove the front camera

Disconnect the connector and remove the front (selfie) camera.


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Step 13. 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.

⚠️ 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 14. Remove the cameras

Pry up the connectors and remove three rear cameras.

Detailed disassembly instructions of ZTE Blade 20 Smart 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.

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Disassembling\Repair has easy complexity and takes about 13 minutes in time. Our manual is suitable for all models ZTE Blade 20 Smart released for markets in different countries.



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