How to carefully remove the back cover with Xiaomi Mi9: instructions with photos and videos

Xiaomi Mi9 is the flagship smartphone of 2019, which is still popular thanks to the powerful “iron” and affordable price in the secondary market. However, over time, even such a reliable device can have problems, from battery wear to camera breakdown or speaker. Most repairs require removing the back cover, but it is not easy to do it – the manufacturer uses glue and latches, and the wrong actions can damage the plumes or body.

This article will help you disassemble the Mi9 without risking a break in the device, detailing the tools you need, showing you step-by-step photo instructions, warning of typical errors, and giving you tips on reverse assembly, and focusing on the model’s vulnerabilities – the fragile glass case and thin plumes under the lid, which are often damaged when disassembled sloppyly.

Preparation for disassembly: tools and security measures

Before you start removing the lid, make sure you have everything you need.The Xiaomi Mi9 has adhesive body fixation, so a regular screwdriver won't be enough.

• 🔧 Plastic mediators or shoulder blades (2-3 - for tidy lids. Metal tools can scratch the body.
• 🔥 Hair dryer or thermo-air station for softening the glue. Optimal temperature: 60-80°C (not higher!).
• 🧲 Suction cups (2 pcs) - will help to evenly lift the cover after heating.
• 🔋 Screwdriver. T3 and T5 — screw-off.
• 📦 Container for screws - so as not to lose small parts (in the Mi9 12 pieces!).
• 🧴 Isopropyl alcohol (90%+) — for removing glue residues during reverse assembly.

Important: Don’t use a knife or other sharp objects – they can damage the flexible plumes under the lid (especially the fingerprint scanner plume that runs along the right edge).If you don’t have experience, practice on an old smartphone or watch the Mi9 video disassembly on YouTube (we recommend Xiaomi Repair or Fixez channels).

⚠️ Attention: If yours Mi9 In official service centers Xiaomi for such cases use special equipment that minimizes risks.

Step-by-step: how to remove the cover from Xiaomi Mi9

The disassembly process takes 20-30 minutes depending on the experience, follow the instructions strictly by steps to avoid errors:

1. Turn off your smartphone and remove it. SIM-This will prevent short circuits when working with internal components.
2. Heat the body with a hair dryer around the perimeter for 2-3 minutes. Keep the hair dryer at a distance of 5-7 cm so that the screen does not overheat. Pay attention to the corners, where the glue is applied more densely.
3. Set the suction cups closer to the bottom of the smartphone (where the USB-C connector is located). Pull up carefully - a small gap should appear.
4. Insert the mediator into the gap and slowly lead it along the edge of the case, separating the lid. Do not put excessive effort — if the lid does not lend itself, reheat the problem area.
5. Remove the lid completely when all latches are disconnected. Place it on a soft surface (such as a microfiber) so as not to scratch.

Under the lid, you'll see:

• 🔋 Battery with connector (fixed on double-sided scotch).
• 📱 Fingerprint scanner plume (shoots along the right edge).
• 🔊 Dynamic and vibrator (lower part).
• 📷 Main and front camera plumes (upper part).

If the lid is not removed despite heating, do not try to apply force - the Mi9 uses plastic latches that can break. Better repeat the heating or use a thinner mediator. At the very least, contact the wizard.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Xiaomi Mi9, and here are the most common problems and ways to prevent them:

Pay special attention to the fingerprint scanner plume, which is glued to the lid and often breaks off when you take it off, and if it does, you can solder it back, but it requires a soldering station and microelectronics experience, and service centers charge 1,000 rubles for such repairs.

⚠️ Warning: If you notice that the battery is swelling (even slightly) after removing the lid, do not turn on the smartphone and do not continue disassembling! the bloated battery may ignite. Immediately take the device to the service center for a replacement battery (cost for the battery). Mi9 — ~1200-1800 rubles).

What to do after removing the cover: further actions

Once the lid is successfully removed, you can proceed with the basic repairs. Here is what is most often required in the Xiaomi Mi9:

• 🔋 Battery replacement is the most common procedure. Original battery (BM4B) It lasts 2-3 years, and then it drops to 60-70%. ~1000-1500 rubles.
• 📷 Repair of the camera – often fails the main module (48 MP) or stabilizer. Replacement of the module will cost 2500-4000 rubles.
• 🔊 Replacing a speaker or microphone - sound problems are usually associated with contact oxidation or mechanical damage. ~500-800 rubles.
• 📶 Cleaning the connector USB-C — If the smartphone doesn't charge or recognize the cable, the problem may be contamination of the connector.

If you're planning to replace the battery, consider that the Mi9 has it glued to the body with double-sided tape.

1. Disconnect the battery connector from the motherboard.
2. Put a plastic blade on the battery, preheating it with a hairdryer (temperature not higher than 60 ° C!).
3. Do not use sharp objects – a puncture of the battery can cause fire!
4. After installing a new battery, check it with the AccuBattery program (available on Google Play).

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Before reassembling, wipe the contacts of the camera plumes and the fingerprint scanner with a cotton swab dipped in isopropyl alcohol, which will improve the connection and prevent problems with the sensors.

Reverse Assembly: how to properly seal the cover

After the repair is completed, you need to seal the cover tightly so that dust and moisture do not get inside. In the Xiaomi Mi9, the factory adhesive loses its properties over time, so it is recommended to use a new one:

• 🧴 Double-sided scotch 3M (0.2 mm thickness) – budget option, but less reliable.
• 🔥 Clay. B-7000 — It's elastic and waterproof, perfect for smartphones, and it's a thin layer on the perimeter of the body.
• 🛡️ Original Xiaomi glue - sold in service centers, provides factory tightness.

Instructions for bonding:

1. Clean the edge of the body and the inside of the cover of the old glue with isopropyl alcohol.
2. Apply the new glue with a thin layer, without reaching 1-2 mm to the edges (so that the excess does not get out).
3. Carefully combine the cover with the body, starting from the top (where the camera plumes are located).
4. Press the lid evenly around the perimeter. For reliability, place the smartphone under a press (for example, a heavy book) for 10-15 minutes.

After gluing, do not turn on the smartphone for 1-2 hours - the glue takes time to polymerize. Check the tightness by bringing the Mi9 to bright light: if there are gaps on the edges of the lid, the gluing procedure will have to be repeated.

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Using poor-quality glue can lead to dust getting under the lid and breakage of the plumes. Don’t skimp on materials – the original glue or B-7000 will provide a reliable fixation for 2-3 years.

When is the best time to contact the service center

While you can do the Xiaomi Mi9 disassembly yourself, in some cases it is better to trust the professionals.

• 💥 Deep cracks or chips appeared on the lid - independent replacement of glass requires special equipment (vacuum press).
• 🔧 Damaged plumes of the motherboard — their soldering under the microscope costs 1500-3,000 rubles, but guarantees performance.
• 🔋 The battery is swollen or deformed - this is dangerous to health, as the risk of fire is high.
• 📵 The smartphone does not turn on after disassembly - the reason may be damage to contacts or short circuit.

The cost of repairs in official Xiaomi service centers (for 2026):

If you are not confident in your abilities, it is better to pay for professional repairs than risk the health of your smartphone. In Moscow and St. Petersburg, there are good reviews about Xiaomi Service, FixPrice and TechnoDoctor. In the regions, look for workshops with a rating of at least 4.8 on Yandex.Maps or 2GIS.

FAQ: Answers to Frequent Questions