How to disassemble the smartphone Xiaomi Redmi 8A: detailed instructions with photos and nuances

Disassembling the Xiaomi Redmi 8A may be necessary to replace the battery, repair the screen or clean the internal components, but this process requires accuracy and knowledge of the design features of the model, improper actions can damage the plumes, connectors or even completely fail the device.

In this article, you will find a step-by-step guide to the specifics of the Redmi 8A, a list of tools you need, and unique recommendations for working with the adhesive layer of the back cover, which often becomes the main problem in disassembly, and we will also tell you how to avoid typical mistakes and what to do if something goes wrong.

If you've never taken a smartphone apart before, start by exploring the theory. Xiaomi Redmi 8A is a budget model, but its design has a few pitfalls to know about beforehand, such as the thin flexible plume of a fingerprint scanner that can be easily damaged if you unguardedly remove the lid.

Before you start, evaluate your strength. If in doubt, you should contact the service center. But if you decide to act on your own, follow our recommendations and take your time.

Preparation for disassembly: tools and security measures

You'll need specialized tools to disassemble the Xiaomi Redmi 8A, and don't try to do it at hand, it's almost guaranteed to cause damage.

• 🔧 Plastic mediator or shoulder blade (thickness 0.2–0.4 mm) – for separation of the back cover.
• 🔨 The screwdriver. PH00 (magnetic) - for screws inside the housing.
• 🧲 Suction (diameter 4-5 cm) - will help to lid without scratches.
• 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
• 📦 Container for screws - so as not to lose small details.
• 🧴 Isopropyl alcohol 90%+ — cleaner.

Also, prepare your workspace: it should be clean, well-lit, and without static electricity. Use an antistatic mat or at least a grounded metal sheet under your phone. Redmi 8A has fragile plumes, and static discharge can damage them.

If you are planning to replace the battery, pre-order the original battery with a capacity of 5000 mAh (article MB-J10B). Cheap counterparts often have a smaller capacity and can swell over time.

⚠️ Warning: Do not use metal tools to separate the lid! even a small scratch on the antenna tracks (they are located around the perimeter of the housing) can degrade the network signal or Wi-Fi.

Step 1: Removing the back cover - how not to damage the adhesive layer

The hardest part is the detachment of the back cover. In the Xiaomi Redmi 8A, it's glued all around the perimeter, and the glue gets very strong over time, and if you just pull the lid, you risk tearing the fingerprint scanner plume or tearing off the antenna contacts.

Follow this algorithm:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover with a hair dryer (hold at a distance of 5-7 cm) for 2-3 minutes, evenly driving around the perimeter. Don't overheat! Temperatures above 80 °C can damage the battery.
3. Suction the lids and pull up slightly. If the lid doesn't lend itself, heat it up for another 1 minute.
4. Insert a plastic mediator into the resulting slit and carefully steer it around the edge, separating the glue. Start at the bottom edge (from the USB-C connector side).

If the glue is too strong, you can use disassembly threads (sold in phone repair kits), thread under the lid and saw the glue back and forth.

Is the phone off?|Is the tray removed? SIM-map?|Is the lid heated to 60-80?°C?|Is the plastic mediator ready?|Is there a suction cup for fixation?-->

When the lid starts to move, don't rush to remove it completely. First, check if the fingerprint scanner plume (it goes from the top of the lid to the motherboard) interferes with it. Gently disconnect it with a plastic blade, putting the plug on the connector.

⚠️ Warning: If you see that the fingerprint scanner plume is torn after removing the cover, don't panic. The phone will remain functional, but the scanner will not work. The plume replacement will cost 300-500 rubles in the service.

Step 2: Shutting down the battery – why it’s critical

Before you continue disassembling, be sure to turn off the battery. In the Redmi 8A, the battery connector is located at the bottom of the motherboard and is closed with a black insulation tape. Carefully tuck it in and disconnect the plume with a plastic blade.

Why is it so important?

• ⚡ Eliminates the risk of short circuit when working with metal tools.
• 🔋 Prevents accidental phone turn on that can damage plumes.
• 🛠️ Simplifies the work with the motherboard (don’t be afraid to touch contacts).

If the battery is blown up, don't try to remove it yourself! Bloated batteries can ignite if punctured, in which case you should contact the service immediately.

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If the glue under the battery is very strong, moisten it with isopropyl alcohol and wait 5-10 minutes. The alcohol will dissolve the glue, and the battery will depart more easily.

Once the battery is turned off, you can start removing the motherboard, but first, we recommend taking a picture of the location of all the plumes and screws, which will help with the reverse assembly.

Step 3: Motherboard extraction and dynamics

The motherboard in the Redmi 8A is mounted on 11 screws of different lengths, so that you don't confuse them when you build them, you can arrange the screws in order or use a magnetic mat with a markup.

1. Unscrew all the screws (start with the longest USB-C connector).
2. Disconnect the plumes: 📞 Main display plume (latch at the top). 🔊 Dynamic plume (right of the battery). 📷 Main camera plume (at the top of the board).

Carefully tuck the board with a plastic spatula and lift it up. Don't pull the edges, because there are fragile elements in there!

The speaker in the Redmi 8A is glued to the body, but it's easy to remove. Tuck it on the side and pull it up. Be careful, there's an antenna cable underneath the speaker that can be accidentally ripped off.

If you only need to replace the battery or the speaker, you can't remove the motherboard completely, just disconnect the interfering plumes and gently push the board aside.

Yes, I've tried it many times |1-2 times |No, this is my first experience |I prefer not to risk-->

Step 4: Replacing the screen – nuances for the Redmi 8A

The screen in Xiaomi Redmi 8A is a glued module, including a sensor, display and frame. You can not replace the glass or matrix separately - only the entire module. The average cost of the original screen is 3,500-4,500 rubles.

To replace the screen:

1. Remove the back cover and turn off the battery (as described above).
2. Heat the edge of the screen (not the center!) with a hair dryer for 3-5 minutes. This will soften the glue.
3. Insert a plastic mediator into the gap between the screen and the case and carefully guide it around the perimeter.
4. Disconnect the display plume (it is under a metal cover that is attached to 2 screws).

When installing a new screen:

• 🔧 Use a new double-sided tape for fixation (0.2 mm thick).
• 🧹 Remove all remnants of old glue with isopropyl alcohol.
• 🔋 Do not turn on the phone immediately after assembly - let the glue grab (2-3 hours).

⚠️ Warning: If you have white stripes or artifacts after you change the screen, check the density of the plume. Often the problem is solved by re-installing the plume into the connector.

Step 5: Building a Phone – How to Avoid Mistakes

The Xiaomi Redmi 8A should be built in reverse order, but with a few key points in mind:

• 🔩 Screw the screws cross-cross to avoid skewed fees.
• 🧩 Connect the plumes to fixing the board with screws - it is more convenient to check the density of the connection.
• 🔋 Stick the battery to a new double-sided scotch (do not use superglue!).
• 📲 Before the final assembly, turn on the phone with the battery connected, but without a lid - so you can check the performance of all components.

Special attention is paid to the sealing of the back cover. In the Redmi 8A, a thin rubber gasket is placed around the perimeter of the body, which provides dust moisture protection (although the model is not officially IP certified). If the gasket is torn, replace it with a new one (you can cut out of thin rubber).

After assembly, check:

• 📶 Network and Wi-Fi signal quality (if antenna cables are not damaged, there should be no problems).
• 🔊 The work of the speaker and microphone (sometimes the plume of the speaker is connected loosely).
• 📷 Functionality of the chambers (if the camera plume was disconnected during disassembly).

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The most common build error is tug-of-war screws. In Redmi 8A, motherboard screws are screwed into plastic bushings that can crack with excessive force.

Typical problems after disassembly and their solution

Even with a careful disassembly, there can be problems, and here are the most common problems and ways to fix them:

If the phone overheats or discharges quickly after disassembly, the most likely problem is the wrong battery installation or damage to the thermal paste on the processor, in which case it is better to contact the service.

If you encounter a problem that is not in the table, describe it in the comments – we will try to help!

FAQ: Frequent questions about the dismantling of Xiaomi Redmi 8A