Samsung galaxy S21 Ultra Teardown and Disassembly

Hello, our esteemed followers, welcome to a new lesson on your website "Advanced Settings." In this lesson, we will discuss how to disassemble the Samsung Galaxy S21 Ultra 5G phone. We will need a set of simple tools that can help us dismantle our Samsung Galaxy S21.

Disassembling the Samsung Galaxy S21 Ultra 5G is a difficult and accurate procedure that calls for the right equipment and a solid grasp of the internal workings of smartphones. Because of its tightly integrated design and premium construction, disassembling this flagship product is a delicate operation. First, the device is turned off, and the back panel is heated to soften the glass-securing glue.

Samsung Galaxy S21 Ultra Disassembly
Samsung Galaxy S21 Ultra SM-G998 

This is usually accomplished using a heat gun or hairdryer, which ensures that the adhesive is loosened without causing any harm to the rear cover. A plastic opening tool or pick is carefully fitted into a suction cup on the back to pry it open. This stage calls for a great deal of care and caution because the glass is delicate, particularly around the curved edges.

Samsung Galaxy S21 Ultra 5G Disassembly

The Samsung Galaxy S21 Ultra 5G is a sensitive device that should be disassembled carefully to prevent damage. Here is a detailed tutorial for learning purposes:

♠️ Caution: Your warranty will be nullified if you disassemble your gadget. Only proceed if you have the right tools and experience fixing smartphones.

 

The protective internal plastic covers, which contain and shield parts like the NFC antenna and wireless charging coil, must be unscrewed after the back panel has been removed. Several tiny Phillips screws, typically around sixteen, hold these in place.

When the covers are taken off, the technician may see the phone's internal components, such as the cameras, battery connector, and different flex cables. To avoid any short circuits when working on other parts, the battery must be disconnected first.

It is advised to use non-metallic prying tools in order to prevent shorting components or connector damage. The main parts of the phone are now available for additional disassembly or replacement.

Disassembling the Samsung Galaxy S21 Ultra 5G

Disassembling the Samsung Galaxy S21 Ultra 5G is a delicate process and should be done carefully to avoid damaging the device. Here is a step-by-step guide for educational purposes: 

⚠️ Warning: Disassembling your device will void your warranty. Proceed only if you have experience with smartphone repairs and the proper tools.

📱 Disassembly Steps

1. Power Off the Phone
    • Hold the power button and turn off the phone completely.
2. Remove the Back Glass
    • Heat the edges of the back cover to soften the adhesive (about 80°C or 176°F).
    • Use a suction cup to lift the back slightly and insert a plastic pick.
    • Carefully slide the pick around the edges to loosen the adhesive.
    • Be patient; the glass is fragile and prone to cracking.
3. Remove Wireless Charging Coil and Plastic Cover
    • Unscrew the Phillips screws (usually ~16 screws) securing the internal plastic covers.
    • Remove the wireless charging coil and NFC module gently.
    • Detach the mainboard shield.
4. Disconnect the Battery
    • Always disconnect the battery first before working on other components.
    • Use a plastic tool to lift the battery connector.
5. Disconnect and Remove Cameras, Cables, and Boards
    • Disconnect the front and rear cameras.
    • Remove the SIM card tray.
    • Disconnect various flex cables (display, fingerprint, buttons, etc.).
    • Unscrew and remove the motherboard and daughterboard (bottom board).
    • The USB-C port is usually on the daughterboard.
6. Remove the Battery (Optional)
    • The battery is glued in; use isopropyl alcohol to soften the adhesive.
    • Pry the battery carefully without puncturing it.
7. Remove the Display (If Needed)
    • Only do this if you're replacing the screen.
    • Heat and use suction + plastic tools to remove the display from the frame.

Guide about How to Disassemble the Samsung S21 Ultra 5G

Tips and special instructions that should be observed when disassembling a Samsung Galaxy S21 Ultra:
  1. Turn off the device and disconnect the battery before starting disassembly.
  2. Use the proper tools such as a precision screwdriver set, tweezers, and a plastic pry tool to avoid damaging the delicate components.
  3. Take note of the screw locations and their specific orientations to ensure proper reassembly.
  4. Handle the display and other fragile parts with extreme care to prevent cracks or scratches.
  5. Be cautious when disconnecting the display, camera, and other cables to avoid tearing them.
  6. Keep all the small components organized and secure to prevent loss during the process.
  7. Refer to the official service manual or disassembly guide for the specific model for detailed step-by-step instructions.
  8. Discharge any static electricity by grounding yourself before handling the internal components.
  9. Ensure a clean, well-lit, and static-free work area to minimize the risk of dust or debris contamination.
  10. After completing the disassembly, test the device thoroughly to ensure proper functioning before reassembly.

Special tips to disassembly Samsung Galaxy S21 Ultra

  1. Carefully pry open the rear cover and housing using a plastic tool to prevent scratching or cracking the display.
  2. Disconnect the battery connector gently and avoid pulling or tugging on the battery leads, as this can damage the battery cells.
  3. When removing the display assembly, handle it by the edges and avoid applying excessive pressure on the screen to prevent cracking or shattering.
  4. Ensure that all cables are disconnected properly and not forcefully pulled out, which could tear the connectors.
  5. Take note of the orientation and placement of components like the motherboard, camera module, and other delicate parts to simplify the reassembly process.
  6. Use the appropriate tools like non-metallic pry tools to lift and separate components without causing any undue stress or damage.
  7. Discharge any static electricity by grounding yourself before touching the internal electronics to prevent static discharge damage.
  8. Work in a clean, well-lit, and static-free environment to minimize the risk of dirt or debris contamination during the disassembly.
  9. Carefully clean any dust or debris from the internal components using a soft brush or compressed air before reassembly.
  10. Test the device thoroughly after reassembly to ensure all components are functioning properly without any issues.

tools required to disassemble a Samsung Galaxy S21 Ultra 5g

here are the main tools required to disassemble a Samsung Galaxy S21 Ultra 5G smartphone:
  1. Pentalobe Screwdriver - This special star-shaped screwdriver is needed to remove the bottom screws on the phone.
  2. Plastic Pry Tools - Thin plastic tools or playing cards are used to carefully separate the display assembly and rear panel without damaging them.
  3. Tweezers - Precision tweezers help grip and manipulate the small internal components.
  4. Spudger or Plastic Pick - A smooth plastic tool is used to gently disconnect the display and other ribbon cables.
  5. Magnets - Strong magnets can be useful for holding down and securing tiny screws and parts temporarily.
  6. ESD-Safe Work Mat - An anti-static mat prevents static electricity damage during disassembly.
  7. Adhesive Strips - The rear glass panel is often adhered strongly, so adhesive strips or a suction cup may be needed to lift it off carefully.
  8. Having this set of specialized tools on hand makes the disassembly of a Samsung Galaxy S21 Ultra 5G much safer and more manageable. The process does require patience and care to avoid any damage to the phone's sensitive internal components.

Tools Required

  • Small Phillips screwdriver
  • Plastic pry tools (spudgers)
  • Tweezers
  • Suction cup (optional for screen removal)
  • Heat gun or hairdryer (optional for adhesive loosening)

Step-by-Step Disassembly Guide

  1. Power off your Samsung S21 Ultra 5G and remove the SIM card tray located on the top side of the device using a SIM eject tool or a small paperclip.
  2. Heat the back panel of the phone using a heat gun or hairdryer to soften the adhesive holding it in place. Be cautious not to overheat the device.
  3. Insert a plastic pry tool between the back panel and the frame of the phone. Gently apply pressure to separate the back panel from the adhesive. Work your way around the edges until the panel is completely detached.
  4. Once the back panel is removed, you will see the internal components. Locate the battery connector and disconnect it by gently lifting the small tab with a plastic pry tool or tweezers.
  5. Locate and remove the screws securing the wireless charging coil, motherboard, and camera modules. Use a small Phillips screwdriver to carefully unscrew them and keep the screws in a safe place.
  6. Disconnect the flex cables attached to the motherboard and other components by gently lifting the connectors with a plastic pry tool or tweezers. Take note of their positions and orientation for reassembly.
  7. Remove the motherboard by gently lifting it from one end and sliding it out of the device. Be mindful of any cables or connectors that may still be attached.
  8. If you need to replace the display assembly, use a suction cup to lift the screen slightly. Insert a plastic pry tool and carefully separate the display assembly from the frame. Take caution not to damage the flex cables.
  9. To access other components such as the front-facing camera or speaker, remove the necessary screws and disconnect any attached cables. Carefully lift or pry out the components from their respective positions.
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🔧 Notes
  • Label and organize your screws; they vary in length.
  • Be gentle with flex cables and connectors; they are fragile.
  • Reassembly is the reverse of disassembly.

Conclusion

Disassembling the Samsung S21 Ultra 5G requires patience, precision, and the right tools. While the process described above may seem straightforward, it is crucial to exercise caution to avoid damaging the internal components. Remember, disassembling your device may void the warranty, so assess your skills and consider seeking professional assistance if you are uncertain.

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