Disassembly Xiaomi Redmi 7A: how to remove the back cover yourself

Why do you want to know about Xiaomi Redmi 7A?

The back cover of the Xiaomi Redmi 7A is not just a protection for internal components, but also a barrier that must be overcome when repairing, replacing the battery or cleaning from dust. Many users face the need to disassemble the device when it begins to overheat, quickly discharge or require an upgrade (for example, installing a memory card in some versions).

In this article, we'll look at three basic methods of removing the lid: using a mediator, suction, and heating with a hairdryer. Each method has its own nuances, and the choice depends on your experience, the availability of tools, and the condition of your smartphone. For example, if the case already has cracks, heating can exacerbate the problem. And if the glue is too old, the mediator may not cope without first softening.

Before you start, consider that the Xiaomi Redmi 7A is not designed for easy disassembly, its body is glued around the perimeter, and inside are fragile plumes and connectors. According to service centers, 30% of self-disassembly ends in damage to the flexible battery cable or antenna contacts.

Preparation: security tools and measures

To minimize the risks, prepare the workplace and tools.

• 🔧 Plastic mediator (or guitar mediator) - for careful liding.
• 🧲 Suction cup (better with metal ring) – helps create an initial effort.
• 🔥 Hair dryer (or building hair dryer at minimum power) - to soften the glue.
• 🧴 Isopropyl alcohol (90%+) — glue-cleaner.
• 📦 Container for screws - so as not to lose small details.
• 🛠️ Screwdriver. T3 or T4 — screw-off.

Also, prepare soft fabric (such as microfiber) to put your smartphone down and avoid scratches. If you don’t have experience, practice on an old phone or watch video disassembly, this will help you understand how hard you can push the mediator.

⚠️ Warning: Do not use metal tools (knives, screwdrivers) to lid the lid! They leave scratches and can puncture the battery, which will lead to a fire or explosion.

Method 1: Removal of the cover with a mediator (for beginners)

This method is suitable if the glue on your Redmi 7A is not too old (the phone has been in use for less than 2 years), the main advantage is the minimum risk of damage, since it does not require heating.

Algorithm of action:

1. Turn off your smartphone and remove it. SIM-card and memory card (if installed).
2. Place the mediator in the gap between the lid and the body at the charging connector (there is usually weaker glue).
3. Carefully swipe the mediator along the side of the face, slightly pressing, and you'll hear the characteristic clicks, which are the latches detached.
4. As soon as the lid begins to rise, do not pull it sharply: glued areas may remain inside.

If the lid doesn't lend itself, don't put too much effort into it. You'd better go to the heating method (described below). Also look at the corners of the case, because there's often adhesive buildup there, and the mediator can get stuck.

Is the smartphone off?|Whether extracted SIM-card?|Is the propeller space ready?|Is there alcohol on hand to clean?|Have all the tools been tested for integrity?-->

Method 2: Using a hair dryer to soften glue

Heating is the most effective way to loosen the glue, but it's also the most dangerous way. If you overheat the case, you can melt the plastic or damage the battery. The optimum temperature is 60-70 ° C (the hand tolerates, but you can't hold it for long), use a dryer at minimum power, holding it at a distance of 10-15 cm from the phone.

Step-by-step:

1. Heat the back cover around the perimeter for 1-2 minutes, paying special attention to the corners.
2. While the body is warm, attach the suction cup to the center of the lid and pull up.
3. In the resulting gap insert the mediator and carefully lead it along the body.
4. If the glue has time to cool, repeat the heating.

Important: don't point hot air at the display or the camera! Overheating the matrix can cause broken pixels, and the camera lenses can cause clouding. If you don't have a thermometer, check the temperature of the body with your hand: it should be hot, but not burning.

Method 3: Combined approach (suction cup + mediator + heating)

This method combines the advantages of the previous ones and is suitable for the Redmi 7A with a heavily glued lid, the point is to first loosen the glue with heating, then create an initial force with a suction cup, and then carefully separate the lid with a mediator.

Procedure:

• 🔥 Heat the body around the perimeter (as in Method 2).
• 🧲 Then, put the suction cup closer to the bottom edge (where the charging connector is) and pull up.
• 🔧 Insert the mediator into the resulting gap and lead it along the side face, slightly swaying.
• 🔄 Repeat heating and squeezing until the cover is completely disconnected.

This is a skill-intensive process, but it's a better one, and the key is to take your time and make sure that the mediator doesn't slip inside the enclosure (this can damage the plumes).

⚠️ Warning: If you see a bloated battery after you remove the lid (the body is deformed, the battery is white), don't touch it or try to remove it yourself! Immediately take the phone to the service - the risk of fire is extremely high. What to do after the lid is removed? When the lid is finally removed, the Redmi interior design will open in front of you. 7A. Here's what we can do next: 🔋 Replace the battery – if it is swelling or discharged quickly. 📱 Cleaning from dust – especially important for the speaker and charging connector. 🔌 Trail checks – often oxidized antenna or camera contacts. 🛠️ Replace the display or touchscreen if the screen crashes. However, before any manipulation, disconnect the battery! To do this: Unscrew the screws that fix the metal plate above the battery (usually 4-5 screws). Carefully tuck the plate and put it aside. Unplug the battery plume with plastic tweezers (don't pull the wires!).If you're planning to replace the battery, consider: the original battery for the Redmi 7A It has a capacity of 4000 mAh and is attached to bilateral tape. To remove it, you will need to carefully pull a special black tape (if any) or use isopropyl alcohol to dissolve the glue. 💡If you clean your phone from dust, use a soft brush (for example, for camera lenses) and compressed air. Don't blow with your mouth - moisture from your breath can settle on the board and cause corrosion. Typical mistakes and how to avoid them Even experienced users sometimes make mistakes when disassembling Xiaomi Redmi 7A. Here are the most common of them and ways to prevent them: Error Consequences How to avoid using a knife instead of a scratch mediator on the case, battery puncture Use only plastic or wooden tools Overheating the case with a hairdryer Deformation of plastic, damage to the display Control the temperature (max. 80 ° C) and do not warm one zone longer than 30 seconds Abrupt removal of the lid of the battery plume or antenna Remove the lid gradually, checking the mounts on the perimeter Forgot to disconnect the battery before repairing the Cortor To control the temperature (max.) and not to be damaged at the first time of the queue. The solution is to use double-sided tape for fixing or replace the lid entirely (original article — MB-J4010-001). 1. Is the battery plume connected. 2. Is there any damage on the motherboard (blackened elements, the smell of burning). 3. Is it properly installed? SIM-Map (sometimes it interferes with contacts).--> FAQ: Frequent questions about the dismantling of Xiaomi Redmi 7A Can you remove the lid without heating? Yes, but only if the phone is new (in use less than a year) or the glue has already partially lost its properties. Otherwise, without heating, there is a high risk of breaking the latches or damaging the body. For older devices, heating is mandatory. What can you replace a mediator if you don't have one? Any thin plastic card (like a discount card or a bank card), a guitar mediator, or even a plastic blade from a manicure kit, as long as the instrument is non-metal and has no sharp edges. How do you know if the battery is swelling? Signs of bloating: The phone's lid is arching out (especially if you put it on a flat surface); the screen is starting to move away from the body at the edges; the battery shows white or green traces of oxidation; the phone spontaneously shuts down even if there's a charge; you can't pierce or press the battery -- only a replacement in the service; Do you need to change the glue after disassemblying? If you plan to reassemble the old glue with a new one (e, for example, double-sided Scotch 3M or special service, you can not lose your dust in the B-7000) and you can also keep it from covering it tightly. The cost of dismantling Xiaomi Redmi 7A in service centers varies from 500 to 1500 rubles, depending on the region and the complexity of the work. If you need to replace the battery, the price will increase to 1500-2500 rubles (including spare parts).