Disassembling a modern smartphone requires not only accuracy, but also understanding the design of the device. If you’re thinking about opening the back cover of the Xiaomi Redmi 6, you’re facing the challenge of replacing broken glass, battery or other internal components. This model, released in 2018, has a classic budget-friendly design with a plastic back panel that attaches to a special glue around the perimeter of the body.
Unlike flagship devices with glass or metal casings, Redmi 6 is easier to maintain, but there are also nuances: the adhesive layer hardens over time, making dismantling difficult without first heating. Wrong actions can lead to cracks on the lid itself or damage to the internal plumes, so it is important to strictly follow the sequence of operations described below.
Before you start any manipulation, make sure you have the right tool and a free, well-lit workplace.Hurry is the main enemy when repairing electronics. In this article, we will take a detailed look at each step, from preparation to final assembly, so you can safely complete the replacement of components of your Xiaomi Redmi 6 or Redmi 6A.
Preparation of the workplace and the necessary tool
To open the back cover of the Xiaomi Redmi 6, you will need a minimum set of tools that can be found in any specialty store or ordered online. Using inappropriate items such as knives or screwdrivers with a wide sting can lead to irreversible damage to the plastic case.
The main tool for separating the layers will be a mediator or a plastic spatula. Metal tools are not recommended, as they can leave deep scratches or, worse, damage the internal components when you carelessly move, and you will need a hair dryer to soften the glue and suction cup to create the initial gap.
- 🔧 Plastic mediators or shoulder blades for opening the body (2-3 stuff).
- 🔥 Hair dryer (construction or household) for heating the edges of the case.
- 🧲 Suction cup for lifting back cover.
- 🧴 Isopropyl alcohol or special solvent of glue (B-7000).
- 🧹 Wipeless wipes for surface cleaning.
☑️ Checking readiness for repair
It is also important to prepare a screw folding tank if you have them under decorative elements in your modification, although in Redmi 6 the main fixation is glue. Curved tweezers will be useful for extracting small parts or turning off plumes, but they need to work extremely carefully.
Safety Techniques and Preliminary Actions
Safety is not just a formality, it's a necessity that will keep you from getting hurt and keep your device safe.Before you start warming your phone, be sure to turn it off completely. Working with a heated battery carries potential risks, although when it's off, they're minimal.
⚠️ Warning: Never heat the battery area too much, only the perimeter of the back cover needs to be heated, and overheating the lithium-ion battery can cause it to bloat or catch fire.
Take the tray off for SIM-It's a standard procedure for any smartphone that prevents the mechanism from jamming or damage to the cards when the body is deformed from the temperature.
Remove all the protective glass and covers. The surface must be clean so that the suction cup is kept secure. If there are cracks on the back cover, it is recommended to pre-seal them with transparent tape so that the plastic fragments do not fly apart and hurt the hands, and the lid itself does not crumble when heated.
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If the back cover is badly broken, stick a few strips of wide, transparent cross-over tape over it, which will hold the pieces together and allow you to remove the entire panel without losing small pieces.
Check the battery. Ideally, if the charge level is about 40-60%, a fully charged or fully discharged battery is more sensitive to heat. If the phone has been discharged to zero, recharge it slightly before work begins.
The heating and separation process of the cover
The most important step is to soften the adhesive layer, and the adhesive used by the manufacturer becomes elastic at a temperature of about 80-90 It's a hair dryer at home, and you need to heat it evenly, and you need to put a stream of hot air all over the perimeter of the device.
Do not hold the hair dryer long at one point, especially in the center where the camera and main nodes are located. Move the device or hair dryer in circular movements, paying special attention to the angles and faces. The heating process usually takes from 2 to 4 minutes depending on the power of the hair dryer.
| Heat zone | Time of exposure | Temperature regime | Risks. |
|---|---|---|---|
| Perimeter (all sides) | 2-3 minutes | 80-90°C | Minimum |
| Camera area | No more than 10 seconds. | Up to 70°C. | Damage to the matrix |
| Lower end (connector) | 30-40 seconds. | 80°C | Deformation of plastic |
| Central part | Not recommended | - | Battery bloating |
After enough heat, try gently putting the lid on with a suction cup, attach it to the bottom of the back panel, closer to the edge, and pull it upwards, creating tension, while inserting a plastic mediator into the gap.
What to do if the lid does not move?
Move the mediator along the perimeter, cutting the adhesive layer. Don't dive the tool deep, 2-3 millimeters is enough. Try to drive the blade parallel to the plane of the body. If you feel strong resistance, stop and warm up the area again.
Working with internal components and plumes
Once you have opened the back cover of the Xiaomi Redmi 6, don’t be in a hurry to remove it completely. Inside the device are plumes connecting the main board with additional modules, a sharp movement can break them, which will cause the buttons, vibrator or main speaker to fail.
In Redmi 6, plumes can run through the bottom of the body, connecting the lower board to the motherboard, and be careful with the main camera plume unless it is turned off beforehand (although in this model the camera is often soldered or has a rigid mount, but check for visible connections).
- 📸 The main camera module: check for no tight wires.
- 🔊 Dynamic and vibrating: often attached to glue or latches.
- 🔋 Battery: has adhesive substrate that requires careful extraction.
- 🔌 Trains: can be located along the perimeter of the lower board.
To replace the battery or other parts, disconnect the battery plume from the motherboard, a critical safety step, eliminating the risk of short circuits when metal tools are accidentally touched by the board's contacts.
⚠️ Warning: When working inside the case, use only plastic or antistatic tools. Metal tweezers may accidentally close contacts on the board, which will disable the device.
If your goal is simply to replace glass and you don't plan to go deep inside, try to minimize contact with the internal components. Dust and fat from your fingers can get onto the lenses of cameras or speakers, worsening their performance.
Replacing the battery and fixing common problems
Often, opening the case is required to replace the power source. In Xiaomi Redmi 6, the battery is held on double-sided tape. Over time, the glue loses its properties, but most often the battery has to be "drilled out", doing this with metal objects is strictly forbidden.
Use a plastic card or a special detacher. Gradually separate the battery from the body. If the battery sits very tightly, you can warm up the back of the lid that has already been removed (or the area under the battery if the lid is removed), but very carefully.
When installing a new battery, make sure that the contact area on the plume is clean. If it has oxides, gently wipe them with alcohol. It is also advisable to fix the new battery on a new layer of glue or special tape so that it does not dangle inside the housing when falling.
Another common problem is the outgoing speaker or microphone. After removing the cover, check the density of the dynamic head contacts to the contacts on the board. Sometimes it is enough to simply correct the spring contacts or re-glue the speaker to a new place.
Assembly of the device and check of performance
The final step is assembly. Before you stick the lid back, make sure you check all the functions of the phone, turn on the device, check the sound, vibration, touchscreen and cameras, and if something doesn't work, it's better to find the cause now than re-add the lid.
Clean the seat on the case and on the lid of the residue of old glue. Use alcohol and a napkin. The surface should be perfectly clean and defatted for reliable fixation. Apply a new layer of glue B-7000 or use special adhesive tapes around the perimeter.
Put a lid on it and press it tightly around the perimeter. For better adhesion, you can put the phone under a press (for example, under a stack of books) for 1-2 hours, pre-wrapped in a soft cloth. Don't turn the phone on immediately, let the glue grab at least 15-20 minutes.
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Cleaning old adhesive layers in a good way will ensure that the new lid stays strong and won't unstuck in a week.
After drying, wipe the case from possible traces of glue. The phone is ready for use. Properly executed disassembly and assembly will prolong the life of your gadget and allow you to save on the services of the service center.