Disassembling the Xiaomi Redmi 4A is often a necessary procedure when replacing the battery, screen or other internal components. This budget device, released in 2016, is still popular, but its battery inevitably loses capacity over time. The main feature of the design is that the rear panel is made of aluminum and glued to the frame, rather than just snapping.
The process requires precision and a specific tool, as inept actions can damage the plumes or deform the body. Before you start, it is important to understand that you are acting at your own risk, and any careless movement can violate the tightness or integrity of parts.
In this article, we will look in detail at the process of removing the lid, the preparatory stages and the nuances of working with the adhesive layer.
Preparation of the workplace and necessary tools
Quality training is key to successfully disassembling any electronic device. To work with the Redmi 4A, you will need not only a standard set of screwdrivers, but also the means to safely heat the adhesive. The work surface must be clean, smooth and well-lit so that small screws do not get lost among the components.
The main heating tool will be a hair dryer, you can use a temperature-adjusted building hair dryer or a household hair dryer if it's powerful enough, you also need a plastic spatula (mediator) to snap the latches and a metal spatula to cut the adhesive layer.
Don't forget to prepare the screw tank so you don't confuse them when you build them, and although the screws are the same in this model, the order of their extraction will help to keep the logic of the assembly, and you should also have suction cups to open the screen, which will facilitate access to the insides.
Here is a complete list of the equipment required:
- 🔧 A set of screwdrivers (cross Pentalobe or Phillips)
- 🔥 Hair dryer (construction or household)
- 🪛 Plastic mediators and shoulder blades
- 📎 Metallic thin spatula
- 🧲 Magnetic mat or screw container
☑️ Checking disassembly readiness
⚠️ Warning: Before starting any work, be sure to turn off the device. Attempting to remove the lid on the included smartphone can lead to a short circuit if the plumes are accidentally damaged.
Heating the glue layer and beginning of the autopsy
The most critical step is to soften the glue that holds the back cover. The Xiaomi Redmi 4A uses a fairly aggressive adhesive compound that becomes very hard when cooled, and heat should be produced evenly around the perimeter of the device, paying special attention to the corners and edges.
Use a dryer at medium temperature, keeping it at a distance of 3-5 cm from the body. Heating time is usually from 2 to 5 minutes, depending on the power of the device. Do not overheat the center of the phone, where the battery is located, so as not to damage it or cause bloating.
Once the body is warm to the touch, you can start creating a gap, insert a suction cup at the bottom of the back cover (near the charging connector) and slightly pull up, while gently inserting a plastic mediator into the gap.
If you don't get a gap, don't use excessive force. You better warm up the problem area again. The metal case conducts heat well, so you have to be careful.
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To see if the glue is warm enough, try to twist the suction cup a little bit, and if it slides easily and the lid is a little movable, you can start opening it.
Technique of detaching the lid from the frame
Once the mediator is inserted into the bottom, you need to slowly move it along the side faces. The movements should be sliding, the tool blade should cut off the adhesive layer, not break the plastic or bend the metal. The Redmi 4A cover fits tightly to the frame, so the process can take several minutes.
Don't try to separate the lid completely at once. First, walk around the perimeter, make sure that the glue is cut everywhere. Pay special attention to the areas around the camera and speakers where the adhesive layer may be thicker.
Use a thin metal spatula only after the plastic blade has passed in a circle. Metal will help to finally clean the glue residue, but requires great care not to scratch the aluminum frame or damage the internal plumes.
The main stages of movement of the instrument:
- 👇 Start at the bottom of the case (near microUSB)
- ➡️ We're driving the shoulder blade up the right side of the face.
- ⬆️ Pass the upper part (near the connector 3.5 mm)
- ⬅️ We're down the left side to start.
⚠️ Warning: It is strictly forbidden to insert a screwdriver or sharp tool deep inside the case, under the lid are display plumes and connectors that are easy to snack or damage.
Design features and internal components
When you successfully remove the lid, you'll see the inside of the smartphone. The Xiaomi Redmi 4A has a plastic base frame to which the motherboard is attached. You'll immediately notice a large battery that occupies almost half of the interior space.
Notice the location of the plumes. In this model, the display plume and the touchscreen plume can be run under protective metal plates or glued to a frame. Careful handling of these elements is critical, because they are difficult to replace and expensive.
Also worth noting is the presence of protective films on some nodes, which are not recommended to be removed unnecessarily, because they protect the components from dust and static electricity. If you're planning to replace the battery, you'll need access to the bottom plume that connects the board to the charging socket.
Why do you need black tape inside?
Table of the main characteristics of Redmi 4A
Understanding the technical specifications of the device helps you better navigate the repair and selection of spare parts. Below are key parameters of the model that can be useful in diagnosis.
| Parameter | Meaning | Note |
|---|---|---|
| Model | Xiaomi Redmi 4A | Code name rosy |
| Case material | Plastic/Aluminum | Back cover metallic |
| Battery | 3120 mAh | Non-removable (requires disassembly) |
| Display. | 5.0 inches | IPS, resolution 1280x720 |
| Processor | Qualcomm Snapdragon 425 | 4 cores |
Completion and assembly of the device
After all the necessary manipulations (replacement of the battery, cleaning the speaker, etc.), the assembly stage begins. Before installing the lid, you must carefully clean the old residues of glue from the frame and the lid itself, you can use alcohol or a special solvent, applying it to a napkin.
To fix the lid, it is recommended to use a special glue B-7000 or T-7000, or ready-made adhesive pads. Apply a thin layer of glue around the perimeter of the frame, avoiding getting into the cameras and sensors. Press the lid hard and lock the device with rubber bands for 15-20 minutes before the primary polymerization of the adhesive.
Check all the functions of the phone before you fix it, sound, vibration, touchscreen and charging, and if everything works correctly, you can leave the phone dry.
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Good cleaning of old glue is a guarantee that the new cover will lie flat and without gaps.
⚠️ Warning: Do not turn on your phone immediately after applying the glue if you have touched internal contacts. 10-15 minutes for the solvent vapors to escape.