How to carefully remove the back cover on Xiaomi Redmi Note 4X: tools, risks and step-by-step analysis

Removing the back cover of the Xiaomi Redmi Note 4X is a challenge that owners face when replacing a battery, speaker or repairing plumes. The model, released in 2017, is still popular due to its reliability, but its body is glued around the perimeter, which makes it difficult to disassemble. Unlike modern smartphones with a modular design, it requires patience and the right tools.

Many users are afraid of damaging the case or plumes, and for good reason: improper removal of the lid can lead to cracks in plastic, break flexible cables or even failure of the fingerprint sensor. In this article, we will discuss three methods of disassembly (with a mediator, a hairdryer and no tools), talk about hidden latches and give tips on how to avoid typical mistakes. If you have never taken out a smartphone, start by watching video instructions at the end of the material.

⚠️ Warning: Removing the lid will void the warranty (if it is still valid) 4X warranty seals are located under the cover at the charging connector and SIM-Check their integrity before starting work.

Preparation: security tools and measures

Before disassembling, make sure you have everything you need. Xiaomi Redmi Note 4X does not require professional equipment, but you can not do without tools.

• 🔧 Plastic mediator (or guitar mediator) - to separate the cover and the body. Metal blades can scratch the plastic.
• 🔥 Hair dryer (construction or household with a mode of "hot air") - for softening of glue. Optimal temperature: 60-80°C.
• 🧲 Suction (optional) – helps to lid the lid at the beginning of the process.
• 📦 Container for screws - in Redmi Note 4X They are few, but easy to lose.
• 🧴 Isopropyl alcohol (90%+) — for removing glue residues after disassembly.

Also, prepare your workspace: a clean surface (better with a soft substrate), good lighting and a spare battery (if you plan to replace it). Don't disassemble your smartphone on the carpet - static electricity can damage the board.

⚠️ Note: If you are disassembling a smartphone with a discharged battery (<20%), Put him on a charger on 10–15 Disassembly with a fully discharged battery increases the risk of short circuits in the event of accidental closure of contacts.

Method 1: Removal of the cover with a mediator (the safest)

This is a tool that works for most users, and it requires minimal tools and minimizes the risk of damage, and the rule of thumb is to take your time and move around the perimeter carefully.

Steps:

1. Turn off your smartphone and remove the tray. SIM-map.
2. Heat the edge of the body with a hair dryer (especially around the power and volume buttons) for 30 to 40 seconds.
3. Insert the mediator in the gap between the lid and the case at the USB-Type C connector. Carefully lead it along the edge, separating the lid.
4. Once the lid starts to rise, move the mediator to the next corner, repeat heating and separation around the perimeter.

The hardest part is to separate the lid from the fingerprint sensor, because there are latches, so don't pull the lid up, but gently move it to the side, and if you feel resistance, warm it up again.

Connected the smartphone to charge for 10 minutes |

Cleaned it up. SIM-memory-card|

Prepare all instruments in range |

Heated edges of the body with a hairdryer (no more than 80 ° C) |

Checked for no cracks on the lid before disassembly-->

Method 2: Using a hair dryer to soften glue

If the mediator doesn't work, you can increase the heat. This is effective, but it requires caution: overheating can damage the battery or the screen. The optimal temperature is 70-80 ° C (the hand tolerates, but not comfortable).

Instructions:

1. Heat the back cover with a hairdryer for 1-1.5 minutes, evenly driving a jet of air around the perimeter.
2. Apply the suction cup to the center of the lid (near the camera) and pull up slightly. If the lid doesn't lend itself, repeat heating.
3. Once a gap appears, insert the mediator and guide it gently along the edge.

⚠️ Warning: Do not direct hot air to the screen or battery for longer than 10 seconds in a row. - Redmi Note 4X battery glued to the lid - its overheating can lead to swelling.

Method 3: Untooling (emergency)

If you don't have a mediator or a hair dryer on hand, you can try removing the lid with your nails or a plastic card, which is risky, but sometimes it works.

Algorithm:

1. Find the weakest spot, usually the corner of the USB-Type C connector.
2. Carefully tuck the lid with a nail or map, trying to create an initial slit.
3. As soon as a gap of 1-2 mm appears, keep the map along the edge, gradually increasing the gap.

⚠️ Warning: Without heating, the glue remains strong, so there is a high risk of breaking the latches. If the lid fails after 2-3 attempts, stop and use the hair dryer.

Hidden latches and traps in the Redmi Note 4X

Even if the lid has moved around the perimeter, it can hold several hidden elements:

Pay special attention to the plume of the fingerprint sensor, which is glued to the lid and can come off when you move sharply. If you are disassembling a smartphone to replace the battery, first disconnect the plume from the board (you will need a screwdriver T3).

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If you see the fingerprint sensor plume ripped off after you take off the lid, don't panic. You can solder it back to the service center, but it's cheaper than replacing the entire lid.

What to do after the lid is removed?

When the lid is finally removed, the internal design of the Redmi Note 4X will open in front of you:

• 🔋 Battery - glued to the lid, disconnected after removing the connector on the board.
• 📱 Motherboard - closed with a metal screen, mounted on 6 screws T3.
• 🔊 Dynamic and vibrator - located in the lower part, attached to the latches.
• 📷 Camera and sensor plumes are fragile, don’t pull them by the wires!

If your goal is to replace the battery, first disconnect the connector from the board (use a plastic blade). Other repairs (such as changing the speaker) may require a complete disassembly.

⚠️ Warning: Don't touch battery contacts with metal objects.Redmi Note 4X a lithium polymer battery is used, which can ignite when short-circuited.

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After any repairs, check the tightness of the case. the Redmi Note 4X has no official water protection, but dust and moisture can penetrate through a loosely-fitting cover.

How to properly install the lid back?

Putting the lid back in often raises more questions than removing it.

1. Make sure all plumes are connected and the screws are twisted.
2. Clean the edge of the case and cover of the old glue with isopropyl alcohol.
3. Apply a new adhesive (e.g., B-7000) with a thin layer around the perimeter of the lid. Avoid the speaker and microphone area!
4. Carefully press the lid, starting from the top edge, and fix it with tape for 10-15 minutes.

If there is no glue, you can do without it, but the cover will hold less reliably, in which case use double-sided tape in the corners (but don't overdo it - it will be difficult to remove it the next time you repair it).

After assembly, check:

• The performance of the fingerprint sensor.
• Quality of reception of the signal (antennas are located along the perimeter of the housing).
• No backlashes when pressing the cover.

FAQ: Frequent questions about the Redmi Note 4X disassembly