How to straighten the case of Xiaomi smartphone: from the bending of the screen to the deformation of the rear panel

Deformation of the case of Xiaomi smartphone is a problem faced by owners of even flagship models like Xiaomi 13 Ultra or budget Redmi Note 12. The bending can occur after a fall, sloppy pressure on the screen or factory defect (especially models with aluminum frame).

In this article, we will discuss 5 working methods - from simple (using improvised means) to professional (using thermoplastic materials), you will learn how to determine the type of deformation, what tools will be needed, and why in any case you should not heat the body with a hairdryer above 60°C – this leads to detachment of glue under the screen in 9 out of 10 Xiaomi smartphones, and we will also analyze in which cases self-repair is dangerous and better consult specialists.

The reasons for the deformation of the Xiaomi body: why metal and plastic bend

The body of Xiaomi’s smartphone can deform for several reasons, and the correct diagnosis depends on the choice of straightening method.

• 🔨 Mechanical impact: falling on a hard surface (especially an angle), pocket pressure (such as if you sit on a phone) or sloppy extraction from a case. 12T Pro, POCO F5) It is easier to bend than steel (Black Shark 5 Pro).
• 🏭 Factory marriage: thin walls of the body (characteristic of Redmi 10 and POCO M4 Pro) or uneven distribution of material during casting, more often manifested after 3-6 months of use.
• 🔥 Thermal exposure: overheating of the battery (for example, when charging with a non-original adapter) or prolonged exposure to the sun. A2) They can "lead" at temperatures above 50.°C.
• 💧 Humidity and corrosion: the ingress of liquid into connectors or under the screen leads to the oxidation of metal elements, which over time deforms the body.

The most dangerous type of deformation is bending along with the screen. If the display is damaged (web spiders appear or the backlight becomes uneven), straightening the body can aggravate the problem, in which case you first need to change the screen, and then correct the geometry.

⚠️ Note: If the case deformed after falling, and the smartphone stopped turning on or artifacts appeared on the screen, do not try to straighten it yourself.

How to determine the type of deformation: diagnosis before repair

Before you start straightening out, you need to know exactly what part of the body is affected and how seriously, and take your smartphone and follow these steps:

1. Visual inspection: Put your phone on a flat surface (like glass) and see if there are gaps between the case and the desk. If the smartphone is swinging, the deformation is significant.
2. Screen check: swipe your finger around the edges of the display, and if you feel a step between the glass and the frame, the body is bent in the area of the screen.
3. Back test: attach a ruler to the back cover, and if there's a gap between it and the body, the panel is deformed.
4. Button check: press the volume and power buttons, and if they go up or protrude, the body is bent in the mounting area.

Also, pay attention to the symmetry: compare the left and right sides of the case. 11T Pro often bends the right side because of the camera's location. If the deformation is asymmetric, it indicates local mechanical impact.

Method 1: Straightening the Xiaomi body with pressure (for mild deformations)

This method is suitable for minor curves of the back panel or side frames, when the deformation does not affect the screen.

• 📦 A thick book or a wooden board (as a support).
• 🧊 Soft tissue (microfibra or flannel).
• 📏 Line or plastic card for control.

Step-by-step:

1. Put the smartphone screen down on the soft fabric so as not to scratch the glass.
2. Determine the direction of the bend: if the body is "bent" inward, the pressure must be applied at the edges; if "bent" outward - in the center.
3. Carefully press the deformed zone, spreading the force evenly. For Xiaomi with an aluminum body (Mi 11, 12 Pro) enough force 2-3 kg.
4. Hold the pressure for 10-15 seconds, then check the result with a ruler.
5. Repeat the procedure 3-5 times, gradually increasing the effort.

Is the phone case taken off?|Are there any cracks in the back panel?|The screen doesn't move away from the frame.|Phone is switched off (to avoid sensor damage)-->

⚠️ Warning: Do not apply force to the area of the camera or connector USB-C — If after 5 attempts the deformity has not decreased, stop and move to other methods.

This method works in 60% of cases for plastic enclosures (Redmi). 9A, POCO C40) If the bending is still there, try combining pressure with heating (method 3).

Method 2: Using vacuum suction cups to correct geometry

Vacuum suction cups (such as those used to attach smartphones to a car) help pull out concave areas of the body without risking damage to the screen, a method that is effective for models with a smooth back panel (Xiaomi 13 Lite, Redmi Note 11 Pro).

Materials required:

• 🧲 Suction cup with a diameter of 3-5 cm (can be used from the set for mounting the phone in the car).
• 🧵 String or line (for fixation).
• 📐 Corner or ruler for control.

Instructions:

1. Wipe the back of your smartphone with an alcohol napkin to remove the fat.
2. Attach the suction cup to the center of the deformed area. For better grip, slightly heat the body with a hairdryer (no higher than 40).°C!).
3. Pull the suction cup perpendicular to the surface of the body with a force of 1-2 kg. Hold 5-7 seconds.
4. If the deformation does not correct, fix the thread on the suction cup and pull it through the block (for example, the door handle), creating a constant force for 10-15 minutes.

💡

For matte-coated models (POCO X5 Pro) before using the suction cup, apply a thin layer of Vaseline to it - this will improve traction.

This method is particularly effective for plastic cases, as they are more elastic. For metal models (Xiaomi Mix 4), vacuum pulling is combined with heating (method 3).

Method 3: Thermal correction – when and how to heat the Xiaomi case

Heating allows the body material (especially aluminum or plastic) to soften and return to its original shape, but this method requires caution: overheating above 60.°C can damage the glue under the screen or battery.

What you need:

• 🔥 Hair dryer (construction or household with temperature control).
• 📏 Metal ruler or coal mine (as a support).
• 🧤 Thermogloves (to protect the hands).

Step-by-step algorithm:

1. Turn off your smartphone and remove it. SIM-map.
2. Put the phone on a flat surface, putting a soft cloth under the screen.
3. Heat the deformed area with a hair dryer from a distance of 10-15 cm, keeping the temperature within 50–60°C (check with infrared thermometer or touch – the body should be warm but not hot).
4. After 1-2 minutes of heating, gently press the body in the reverse deformation direction. For Xiaomi with an aluminum frame, use a wooden bar to distribute the force.
5. Lock the phone in the correct position for 5-10 minutes (for example, under a load of 0.5-1 kg).

⚠️ Warning: Do not heat the area around the camera or connector USB-C — This can damage the leakage and cause dust to enter the body. For models with a glass back panel (Xiaomi Civi 3), the thermal method is not suitable - the glass can crack.

Method 4: Professional straightening with a strubbine (for severe deformities)

If the Xiaomi body is severely deformed (gap greater than 2 mm), a more rigid fixation will be required. The strubbine allows you to evenly distribute the pressure and correct the bending without risking damage to the internal components.

Tools:

• 🔧 Stripe with soft pads (so as not to scratch the body).
• 📐 Two wooden plates (thickness 1-2 cm).
• 🧴 Silicone pad (to protect the screen).

How to straighten:

1. Place the smartphone between the wooden plates, placing a silicone pad on the screen side.
2. Tighten the rod so that the pressure is distributed throughout the length of the case.For Xiaomi 11 Lite NE enough force 3-4 kg.
3. Leave the structure for 12-24 hours at room temperature.
4. Periodically check the result, weakening the strubbine for 5-10 minutes every 4 hours.

💡

Strubzin can be replaced with heavy books (weighing at least 5 kg), but in this case the pressure will be less uniform, and the risk of damage to the screen is higher.

This method is suitable for aluminum and steel cases, but not recommended for plastic models (Redmi). A1, POCO C50) — They can crack under prolonged pressure.

Method 5: Repair of local dents (e.g., after impact)

If the Xiaomi body is bent in only one place (for example, after falling to a corner), you can use spot straightening using improvised means, this method is suitable for dents up to 1.5 mm deep.

Tool options:

• 🔨 Wood stick (for example, a hand handle).
• 🧊 Ice (for cooling metal after deformation).
• 🔧 Screwdriver with a flat tip (wrap with tape so as not to scratch the body).

Implementation technique:

1. Place your smartphone on a soft surface with the screen down.
2. Then, put the dent on the inside (through the jack). SIM-For Xiaomi with a metal case, use a screwdriver wrapped in cloth.
3. If the dent does not align, heat it with a hair dryer (40–50).°C) and repeat the pressure.
4. After straightening, cool the area with ice to fix the shape.

For models with removable back panel (Redmi) 9C) You can remove the lid and straighten the dent from the inside, but this requires care - do not damage the battery plumes or the camera.

When self-repair is dangerous: cases for contacting the service

Not all Xiaomi body deformities can be fixed at home, but here are the situations when it is better to trust the professionals:

• 🚨 Screen damage: if the display bends with the body (cracks appear, broken pixels or the backlight becomes uneven), straightening can aggravate the problem.
• 🔋 The battery has risen: if the body has deformed due to a bloated battery (seems through the "bubble" on the back panel), self-rightening is strictly prohibited - the risk of fire!
• 💧 Liquid entry: If the bending occurs after contact with water, the contacts inside may have oxidized, requiring disassembly and cleaning with alcohol.
• 🔧 Damaged motherboard: if after deformation the phone does not turn on, overheats or does not work part of the functions (camera, speaker), the problem is deeper than it seems.

The cost of professional body straightening in the service varies from 1,500 to 5,000 rubles depending on the model and the degree of damage. For comparison, replacing the screen with the Xiaomi 13 Pro will cost 15,000-20,000 rubles, so it is sometimes cheaper to fix the case immediately than waiting for the problem to worsen.

💡

Before visiting the service, take photos of the warp from different angles and record video of the phone’s operation (including a test of the sensor, camera and speakers), which will help the wizard to diagnose the problem faster.

FAQ: Frequent questions about the straightening of the Xiaomi body