The back cover of the Xiaomi Redmi smartphone is not just a decorative element, but an important part of the design that protects the internal components from dust, moisture and mechanical damage. However, sooner or later, the owner faces the task of removing it: whether it is replacing the battery, repairing plumes, cleaning dust or installing additional modules. Unlike the flagship models with all-metal cases, most Redmi devices have removable or glued panels, which complicates the process.
This article will help you understand how to open the back cover without damage, what tools you will need, and what to look for when working with different generations of Redmi — from old models with removable batteries to modern ones with adhesive mounting. We will also talk about the typical errors that lead to cracks in plastic or damage to plumes, and give recommendations for choosing tools for home repairs.
Why you might need to open the back of Xiaomi Redmi
The reasons for disassembling a smartphone are both planned and emergency, and here are the most common situations when users decide to take this step:
- 🔋 Battery replacement is the most common reason, and over time, battery capacity drops and needs to be replaced, especially on models older than 2-3 years.
- 📱 Repair after a fall: A cracked screen often entails damage to plumes or detachment of the battery, which requires opening.
- 🔧 Cleaning from dust and dirt: over time, garbage accumulates in the connectors and under the lid, worsening the heat sink.
- 📶 Replacement of antenna modules or SIM-The tray if the smartphone stopped catching the network.
- 🔄 Modding: installation of additional modules (for example, NFC-Chip to older models) or replacement of speakers.
It is important to understand that Xiaomi warranty is automatically removed when you open the case yourself, if there are no obvious signs of a factory defect on the device. If your Redmi is still warranty, you should contact the service center - especially if the problem is related to the battery or motherboard.
Types of rear panels on Xiaomi Redmi: what you need to know before disassembling
The design of the Redmi back cover is highly dependent on the model and year of production, and can be divided into three main types:
| Type of cap | Xiaomi Redmi models | Features of attachment | Difficulty withdrawal |
|---|---|---|---|
| Removable (on the latches) | Redmi 3S/4/4A/4X, Redmi 5A | Fastening on plastic latches, often with rubber seals | Low (can be removed by a mediator) |
| Sticked (with glue layer) | Redmi Note 5/6/7/8/9/10, Redmi K20/K30/K40 | Perimeter glue + latches. Requires heating to safely remove | Medium (needs a hair dryer and a sucker) |
| All-metal (with glue and screws) | Redmi Note 11/12 Pro, Redmi K50/K60 | Glue + screws under the lid. High risk of damage if you open it neatly. | High (requires experience and special tools) |
On IP-certified models (like the Redmi Note 11 Pro+ 5G), the adhesive layer is thicker and the seals are denser, making it harder to disassemble but retaining waterproofing. If you're not sure what type of mount your model is, check it out on Xiaomi's official website or in the YouTube showdowns.
⚠️ Note: Some models (e.g. Redmi) 9T or Redmi Note 10S) There are screws under the back that hold the metal frame, and if you don't unscrew them before you take them off, you can damage the plumes!
Essential Tools: What to Buy for Safe Disassembly
You can't open the back cover of Xiaomi Redmi with your bare hands, you need a minimum set of tools.
- 🔧 Plastic mediator or spatula (thickness 0.1-0.3 mm) - for snapping the lid without scratches.
- 🔥 Dryer or thermo-air station (power 300-500 W) - for softening the glue on glued panels.
- 🧲 Suction cup (better with metal ring) - helps to lid after heating.
- ⚙️ Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, torks T3/T4) — screw-cover.
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
- 📏 Plastic separators (triangulators) – to prevent the lid from sticking back when replacing parts.
If you plan to regularly repair equipment, it makes sense to buy a specialized set for smartphones (for example, iFixit Pro Tech Toolkit). For a one-time battery replacement, you can do with a budget option for 300-500 rubles.
Check the model of the smartphone and the type of mounting of the cover |
Prepare the workplace (clean surface, good lighting)|
Disconnect the smartphone and remove SIM-map|
Wear an antistatic bracelet (optional, but recommended)|
Prepare a container for screws (so as not to lose)-->
Do not use metal blades or knives – they leave scratches and can damage the plumes. Also avoid overheating with a hairdryer: temperatures above 80 °C can warp the plastic or damage the battery.
Step-by-step: how to remove the back cover Xiaomi Redmi
The process of disassembly depends on the type of attachment, but the overall sequence of actions is the same. Consider the universal algorithm for the example of the Redmi Note 8 Pro (adhesive cover):
- Turn off your smartphone and remove the tray for SIM-This will prevent short circuits when working with internal components.
- Heat the edges of the cover with a hair dryer for 1-2 minutes, keeping it at a distance of 5-7 cm.
- Put the lid on the bottom edge (near the USB-C connector) and pull it up gently. If the lid doesn't lend itself, warm it up again.
- Put the mediator in the gap and slowly traverse the perimeter, snapping the latches. Don't put too much effort into it.
- Remove the lid and put it aside. If there are screws under it (like on the Redmi Note 10 Pro), unscrew them before further disassembly.
On models with a removable cover (for example, Redmi 4X) the process is simpler: just insert the mediator into the slot at the headphone jack and gently tweak the panel around the perimeter.
What to do if the lid does not lend itself?
⚠️ Note: Some models (e.g. Redmi) K40) The fingerprint scanner plume is hidden under the lid, and if it's damaged, the sensor will stop working!
Frequent Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes when disassembling Xiaomi Redmi, and here are the most common ones and ways to prevent them:
- 🔥 Dryer overheating - causes plastic to deform or the battery to bloat. Solution: Keep the hair dryer at a distance and use the thermometer (optimum 60-70)°C).
- 🔪 Sharp objects -- knives or screwdrivers scratch the body and damage the plumes. Solution: plastic or nylon mediators only.
- 🧲 Loss of screws - small screws are easily lost, and without them the lid will not fit tightly. Solution: use a magnetic mat or container with cells.
- 🔋 Battery damage - battery puncture or bloating is dangerous! Solution: if the battery is swelling, don't try to remove it yourself - contact the service.
- 📱 The plume break is particularly common in the fingerprint scanner. Solution: Before you remove the cover, look at the plume layout for your model.
Another common problem is the wrong build, and if you don't turn on your smartphone after you've replaced the battery or cleaned it, check:
- Are all plumes connected (especially batteries and displays)?
- Are there any other objects (screws, pieces of glue) inside?
- Whether the lid fits tightly - if not, the latches may have been damaged.
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If the smartphone overheats or discharges quickly after assembly, check if the graphite heat sink has moved (if it is in your model), it must be carefully returned to place above the processor.
How to glue the lid back: assembly tips
Removing the lid is half the battle, and it's equally important to put it back in the right way so you don't lose the moisture protection and you don't get any squeaky.
- Clean the edges of the case and the lid of the old glue with isopropyl alcohol and a lilac-free wipe.
- Apply a new adhesive layer. You can use: Special glue for smartphones (e.g. B-7000); double-sided tape 0.2-0.3 mm thick (for temporary attachment); Liquid adhesive (e.g. LOCTITE 406) - only for power users!
Line the lid and press it tightly, starting at the center, and use clamps or heavy books to stick it evenly.
Warm up the edges with a hair dryer (temperature 50-60 ° C) for 30 seconds - this will improve adhesion of the glue.
Check the tightness: after assembly, make sure there are no gaps and all buttons work smoothly.
If you have replaced the battery or other components, do not turn on the smartphone right away - let the glue dry (usually 1-2 hours). It is also recommended to check the moisture protection by watering the smartphone with water (only if the model is IP53/IP68 certified!).
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If the smartphone doesn't turn on after assembly, check the battery and power plume connection first. 90% of the time, it's them, not the motherboard, that's the problem.
When it is better to contact the service: signs of complex repairs
Not all breakdowns can be repaired on their own, but here are some cases where you can trust the professionals:
- 💥 Bloated battery – Replacing it requires special tools and knowledge (fire risk!).
- 📱 Damage to the motherboard (no image, no charge, no turn on) - diagnostics on the equipment are needed.
- 🔧 Cracks on the board or chip detachment – repair under the microscope using BGA-stationery.
- 💧 Liquid intake – even if the smartphone is turned on, corrosion may occur later.
- 🔍 Camera or speaker problems after falling – module replacements are often required.
The cost of repairs at a Xiaomi service center or third-party workshop is usually:
| Type of repair | Cost (rupe) | Timeline |
|---|---|---|
| Battery replacement | 1 500 – 3 000 | 1-2 hours |
| Screen replacement (with touchscreen) | 4 000 – 10 000 | 2-4 hours |
| Repairs after water intrusion | 3 000 – 15 000 | 1-3 days |
| Replacement of the charging plume | 2 000 – 4 000 | 1-2 hours |
If you are not sure about your skills, it is better to pay for repairs than to finally break the smartphone. For example, an incorrect battery replacement can lead to a short circuit and failure of the motherboard, and this is already repaired by 10,000+ rubles.