Xiaomi Redmi 7: How to disassemble your phone

Xiaomi Redmi 7 has become a hit in the budget segment due to the combination of characteristics and affordable price. However, like any electronic device, this smartphone is not immune to mechanical damage or failure of internal components. Most often owners face a broken screen, battery wear or damage to the bottom charging plume.

The answer is yes, if you have minimal small electronics skills and the tool you need. The Redmi 7 disassembly (codenamed oncelite) has its own features that differentiate it from the more modern all-glass models. In this article, we will go into detail about the dismantling process so that you can safely replace a failed part without going to a service center.

It's important to understand that any interference with the design of the device carries risks. Wrong actions can lead to damage to the plumes or even short circuit. So before you start, carefully read the instructions and prepare the workplace. Carefulness and consistency are the main keys to successful repairs.

Tools and workplace preparation required

Before you start to disassemble a smartphone, you need to organize your workspace. You need a desk with good lighting, preferably a daylight or under a powerful desk lamp. The surface should be clean, flat and, critically, not conduct electrical current. An antistatic mat is ideal, but you can use a regular wooden table with paper covered in the home.

The Xiaomi Redmi 7 toolkit is pretty standard in modern mobile technology, you don't need complex industrial stations, you don't need a good enough hand tool, you need to pay special attention to the quality of the suction cup and the mediators, because the phone's body is tightly assembled.

• 🛠️ Set of screwdrivers: mandatory presence of cross PH000 And maybe a flat, thin screwdriver to work with plumes.
• 🔧 Plastic mediators (scapula): needed to snap clips and separate the screen from the frame without damage.
• 🌡️ Dryer or heat pad: to soften the adhesive holding the display module.
• 🧲 Magnetic mat or organizer: for sorting screws, as they may differ in length and threading.

For Redmi 7, it is better to use a metal suction cup with a ring, as it provides a more reliable grip on the glass. Also prepare isopropyl alcohol or a special liquid B-7000 if you plan to re-glue the screen after replacement.

Rear cover removal and removal of main screws

Unlike the flagship models with glass rear panels, the Xiaomi Redmi 7 is equipped with a plastic cover, which greatly simplifies the initial stage of dismantling.There is no risk of breaking the glass if you carelessly move, but the plastic can crack when you bending strongly, so act carefully.

First, remove the tray for SIM-This is a must, because the screws are often hidden under or near the port. Turn the smartphone down, and you'll see two screws symmetrically placed on the sides of the Micro-USB charger.

⚠️ Warning: Don't try to unscrew the lid without twisting these two screws.The plastic around the charging port may burst and the body will dangle, which will spoil the appearance of the device.

Once you've twisted the screws, take a thin plastic blade or mediator. Start putting it into the gap between the side bezel and the back cover. It's best to start at the corner near the camera or the side face. Move the tool along the perimeter, gently snapping the plastic latches. You'll hear the characteristic clicks -- that's okay.

You go all the way around the perimeter, you release the lid, you pull it up, you get access to the insides, the battery, the main board, and the camera module, but that's not all, the main components are covered by an additional protective plate.

Removal of the protective plate and access to the plumes

When you take the back cover off, you'll see that almost the entire interior is covered by a black plastic lining, which acts as a radiator and dust shield, and also holds the display plumes and touchscreens against the motherboard connectors, and this plate is attached to many screws of different calibers.

You're going to have to unscrew all the visible screws that are fixing this patch, and they can vary in number, but they're usually around. 10-12 Be careful, some screws may be hidden under stickers or in recesses. Use a magnetic screwdriver to avoid dropping the fastener inside the case.

When all the screws are twisted, gently lift the plastic pad. It can sit tight because of residual glue or a tight fit. Don't pull sharply, because there are plumes underneath. Your goal is to access the display and touchscreen connection area that is located at the top of the smartphone.

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When you unscrew the screws of the protective plate, sort them by length. The screws from different zones can vary by fractions of a millimeter, and mounting a long screw into a short hole can break through the motherboard.

Battery shutdown and display dismantling

This is the most critical stage of dismantling Xiaomi Redmi 7. Before disconnecting any display plumes, be sure to turn off the device. Find the battery connector (usually wide and located closer to the center or bottom of the board) and gently disconnect it with a plastic blade.

Only after the battery is turned off can you go to the screen plumes. The display plume and the touchscreen plume (if they are separated structurally) are connected next to each other. Raise the connector locks up and smoothly pull the plumes over yourself. Don't pull the wire itself, hold on to the thickened connector.

Now that the screen is holding nothing, you can start removing it. The screen in Redmi 7 is glued to the perimeter frame. It takes heating to remove it. Turn on the dryer at the average temperature and evenly warm the edges of the screen for 2-3 minutes. Don't hold the hair dryer at one point for too long so as not to damage the matrix or the plastic frame.

• 🔥 Warm up the screen perimeter with a hair dryer to a temperature around 80-90 degrees (finger must be hard to bear).
• 🧘‍♂️ Insert the suction cup into the center of the screen and create a slight tension by lifting the edge.
• 🔪 In the resulting gap insert a thin mediator and lead it along the frame, cutting the glue.
• 🔄 Repeat heating and cutting the glue in a circle until the screen is completely separated from the body.

⚠️ Warning: When working with a hair dryer, do not direct the jet of hot air directly to the camera. The camera sensor is sensitive to overheating and may start shooting with defects (black spots will appear).

Replacement of battery and other components

Once the screen or protective plate is removed (depending on what you change), the battery is accessed. In the Xiaomi Redmi 7, the battery is glued to the body fairly firmly, and it will also require heating and careful tweaking with a plastic card.

Never use metal objects such as needles or blades to swell a bloated battery. A puncture of a lithium-ion battery can cause instantaneous fire or explosion. Use only plastic tools and, if necessary, isopropyl alcohol, dripping it under the battery to dissolve the glue.

If your goal is to replace the bottom plume, you need to unscrew the speaker and the plastic platform on which the connector is attached after removing the protective plate. The plume can be assembled with a microphone, so change the entire module for reliability.

Assembly of the device and check of performance

The Xiaomi Redmi 7 is assembled in reverse order, but with one important feature: Before you finally twist all the screws and glue the screen, you need to conduct an initial check. Connect the display and touchscreen plumes to the motherboard, then connect the battery.

Turn on the device by pressing the power button. If the screen catches fire, the image comes up and the sensor is working, you did everything right. Only after successful testing can you apply a new glue (B-7000 or analogues) to the frame and fix the display. Let the glue grab for 15-20 minutes under the load (for example, under a stack of books, laying soft cloth).

Put the plastic pad in place, twist all the screws, make sure that no screw is left out, then set the back cover, snap it around the perimeter, and twist two locking screws at the charging port.

Turn on the phone again and check all the basic functions: sound, vibration, cameras, proximity and light sensors, and if everything works correctly, the assembly can be considered complete.

Frequent Mistakes and How to Avoid Them

When disassembling the Redmi 7 on their own, beginners often make typical mistakes that can lead to additional costs. One of the most common is damage to the plume when the connector is snapped. Never pick a metal needle connector, use only dielectric tools.

Another problem is the loss of small screws or the confusion of their places. As mentioned earlier, screws in different corners can be of different lengths. Wrap a long screw into a short hole will cause the screw to rest in the motherboard and, when tightened, break the tracks, which will disable the board.

⚠️ Warning: Do not plug the plumes into the hot one (without turning off the battery) if you have already connected it. This can cause a voltage surge and combustion of the power controller or backlight.

Trying to rip the screen off without first warming up the glue is almost guaranteed to break the matrix, even if the touchscreen glass has already cracked.

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The secret to success is to take your time. 90% of repair failures are due to haste and the use of force where patience is needed.