Xiaomi Mi 9 Pro
Mi 9 Pro
harder than it seems
Many users are afraid to disassemble their smartphones for fear of losing their warranty or breaking the device. But if the warranty period has expired and repairs in the service are too expensive, disassembly with their own hands can save up to 70% of the cost. The main thing is to follow the instructions, use the right tools and take your time. In this article, you will find a step-by-step analysis of the photos, lists of necessary tools, and unique tips for working with the adhesive layer and plumes of the Mi 9 Pro.
⚠️ Warning: Disassembling your smartphone will void the warranty (if it's still valid) and may cause permanent damage. If you're unsure of your skills, contact the service center. Be especially careful about flexible plumes, which cost 30-50% of the cost of a new device.
Preparation for disassembly: tools and security measures
Before you start disassembling the Xiaomi Mi 9 Pro, prepare your workspace and tools, and use the wrong screwdrivers or plastic mediators can cause chips on the body or damage to the plumes.
- 🔧 Screwdrivers: Pentalobe P2 (for screws at SIM- lot), Phillips #00 and Y00 (for internal mounts), Torx T3/T4 (for certain modules).
- 📱 Plastic mediators (2-3) or special suction cups to remove the display. Metal tools can't be used, they scratch the glass.
- 🔥 Dryer or thermo-air station (at least 800W) for softening the adhesive. The optimum temperature is 70-80°C.
- 🧲 Magnetic mat or organizer for screws - in the Mi 9 Pro there are more than 20 pieces of different lengths!
- 🧴 Isopropyl alcohol (90%+) to clean glue and contacts, but you can't use acetone or solvents, because they damage plastic parts.
- 🔋 A new adhesive layer (e.g., Tesa 61395 or analogues) for reverse assembly. The old adhesive loses its properties after heating.
Also prepare the working area:
- Cover the table with a soft cloth or rubber mat to avoid slipping parts.
- Make sure there is no dust in the room – it can get on the adhesive layer or under the display.
- Turn off your smartphone and wait until it cools (if you were working under load).
⚠️ Warning: The Mi 9 Pro uses a double-sided, grid-reinforced adhesive layer. If you overheat it above 90°C, the adhesive can leak and stain the internal components. Use a thermometer to control the temperature!
Step 1: Removing the back panel is the riskiest step
The Xiaomi Mi 9 Pro rear panel is mounted on adhesives and latches around the perimeter, which is easily damaged, as the glass is thinner than many competitors (only 0.8 mm).
1. Heat the edges of the body with a hairdryer for 2-3 minutes, holding it at a distance of 5-7 cm Start at the bottom (at the USB-C connector), then move around the perimeter. Do not stay in one place for more than 10 seconds!
2. While the glass is warm, place the suction cup closer to the lower edge (where the USB-C connector is located). Carefully pull up - a small gap should appear.
3. Put a plastic mediator in the gap and slowly move it along the body, separating the latches. Do not use force - if the panel does not respond, heat again.
⚠️ Warning: At the top of the case, there are antenna modules under the glass. 5G If the mediator falls too deep, you can tear off the plume or damage the contacts. Keep the instrument at an angle 15-20 °!
If the back panel cracks when you take it off, don't panic. It can be replaced (the original costs ~1500-2000 ₽), but be careful with the adhesive layer on the battery, it can stick to the glass.
Is the smartphone off?|Whether deleted SIM-memory-card?|Are all edges of the body heated?|Are plastic mediators ready?|Is there a spare suction cup?-->
Step 2: Shutting down the battery – why it’s critical
When you remove the back panel, the first thing you need to do is turn off the battery. In the Mi 9 Pro, it's on the bottom, it's covered with a black protective film. Don't touch the contacts with your bare hands, static electricity can damage the motherboard.
1. Carefully remove the protective film from the battery (it is weakly glued, you can tamper with a nail or plastic spatula).
2. With Phillips screwdriver #00, unscrew two screws that lock the metal plate over the battery plume.
3. With a plastic mediator, gently tuck the plume connector and unplug it from the motherboard. Don't pull the wire, the plume is fragile!
⚠️ Warning: If you accidentally close the battery contacts, the smartphone can turn on spontaneously even without a power button. In this case, immediately disconnect the battery again!
After disconnecting the battery, it is recommended to wait 2-3 minutes - this will allow the residual capacitors on the board to discharge and reduce the risk of damage during further disassembly.
| Action. | Tool. | Risks. |
|---|---|---|
| Removal of the back panel | Hair dryer, sucker, mediators. | Glass cracks, damage to 5G antennas |
| Battery shutdown | Phillips screwdriver #00, mediator | Short circuit, plume damage |
| Withdrawal of motherboard | Screwdrivers Y00, T3, tweezers | Breaking camera or display plumes |
| Battery replacement | Plastic blade, Tesa 61395 glue | Battery damage (risk of fire!) |
Step 3: Removing the motherboard – working with screws and plumes
The Mi 9 Pro motherboard is mounted on 12 screws of different lengths, and you can't mix them up when you build them, because they can break through the board too long, and we recommend that you put them on a magnetic mat in order of extraction.
1. Unscrew all screws around the perimeter of the board (use screwdrivers Y00 and T3). Start at the top where the plume connectors are located.
2. Gently disconnect all plumes:
- 📸 Main camera plume (three modules: 48 MP + 12 MP + 16 MP).
- 🔊 Dynamics and microphone plume.
- 📱 Display plume (the widest, latched).
- 🔋 Charging module plume (if you plan to replace it).
3. Put a plastic blade on the side of the USB-C connector and gently lift it. Don't pull the edges -- there may be soldered contacts on the back!
⚠️ Warning: The Mi 9 Pro uses a liquid metal thermopaste on a Snapdragon 855+ processor. It can spread and close contacts when heated. If you're planning to replace the thermopaste, clean it with a lilac-free isopropyl alcohol wipe.
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If the screws are boiling and do not unscrew, drop a drop of WD-40 on them and wait 5 minutes. Do not use force - the broken thread will require replacing the entire body!
Step 4: Replacing the battery – why it’s harder than it sounds
The battery in the Xiaomi Mi 9 Pro has a capacity of 4000 mAh and is attached to a particularly strong glue, and replacing it is one of the most difficult operations.
1. Heat the battery with a hair dryer to 60-70°C (not higher!) The glue under it will soften, but will not lose strength completely.
2. Carefully tuck the battery with a plastic spatula on either side. Do not use metal tools - the risk of puncture of the battery is high!
3. If the battery fails, don't pull it by force.
- Continue heating by focusing on the hard areas.
- Use a thread or guitar string (0.2 mm thick) to cut through the glue. Run it under the battery with sawing movements.
4. After removing the old battery, clean the seat of glue residue with isopropyl alcohol. Install the new battery only after drying completely!
⚠️ Warning: If you punctured or deformed a battery, immediately place it in a non-combustible container of sand and do not use! Lithium batteries can ignite or explode if damaged.
What to do if the battery is swelling?
Step 5: Disassembling the display and camera – the subtleties of working with fragile details
The Mi 9 Pro is a AMOLED- matrix with an integrated fingerprint scanner, and it costs 8000-12000 ₽ to replace it, so be very careful.
Removal of display:
Heat the front panel with a hair dryer (temperature 70°C).
Use two suction cups – one at the bottom, the other at the top.
- Pull it up carefully, while swiping the plastic mediator around the edges.
Disconnection of the plumes:
The display plume is mounted with a latch, and you can slap it on the right side (if you look at the connector).
The fingerprint scanner plume is very thin – do not bend it at an angle of more than 30°.
Disassembly of the chamber:
Three camera modules (48 MP + 12 MP + 16 MP) are mounted on a separate board.
Unscrew two T3 screws and gently remove the board. Don't touch the lenses - fatty marks spoil the quality of the photo!
⚠️ Warning: If you disassemble your smartphone because of camera problems (such as blurry photos or artifacts), first check if the lenses are contaminated. Often, it is enough to clean them with a soft brush and alcohol to return clarity.
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The Mi 9 Pro display doesn’t have a separate protective glass — the matrix and touchscreen are soldered together. This means that the = glass replacement replaces the entire display (cost from 8000 ₽).
Smartphone Builder: How to Avoid Mistakes
Assembling the Xiaomi Mi 9 Pro after disassembly requires no less care than the disassembly itself.
The adhesive layer:
Use a new double-sided tape (e.g. Tesa 61395).
The 3M 9448A is a better battery for the battery, which is thicker and better.
- Stick parts without bubbles - they can cause overheating.
2. Screws:
Make sure all screws are screwed into their seats, one extra screw inside the case can close the board!
- Tighten their cross-to-cross to avoid distortions.
Testing:
After assembly, turn on the smartphone and check:
- 📶 Work 5G/4G and Wi-Fi (antennae could shift).
- 🔋 Charge (if the battery is not connected correctly, the phone will not charge).
- 📸 All cameras (sometimes the plumes don't connect to the end).
⚠️ Warning: If the smartphone doesn't turn on after assembly, check:
- Is the battery connected (sometimes the plume falls out during transportation).
- Are the contacts closed on the motherboard (look for foreign screws or debris).
- Is the power button damaged (in the Mi 9 Pro, it often sticks after disassembly).