Disassembly Xiaomi Redmi 7: how to carefully remove the back cover without breakdowns

Removing the back cover of the Xiaomi Redmi 7 is a challenge that owners face when replacing a battery, repairing plumes or cleaning dust. Despite its apparent simplicity, the procedure requires caution: plastic latches break easily, and improper use of tools can damage internal components. In this article, you will find a step-by-step photo instruction, a list of necessary tools and a list of typical errors that lead to breakages.

The Redmi 7, launched in 2019, has a latch-to-latch lid design that makes it harder to dismantle than more modern screw-to-rotor devices. If you've never disassembled a smartphone, that's fine: our recommendations will help avoid common problems. And for experienced craftsmen, we've prepared a tool compatibility table and tips for working with fragile elements like a glass camera panel.

Before you begin, answer the question:

Preparation: security tools and measures

To successfully remove the back cover of the Xiaomi Redmi 7, you need a minimal set of tools, but each one is important. Lack of at least one tool can lead to chipped plastic or damage to the plumes.

• 🔧 Plastic mediator (or guitar - 0.3-0.5 mm thick). Metal blades scratch the body!
• 🔥 Dryer or thermo-air station (at least 1000 W) for softening the adhesive.
• 🧲 Suction cup (diameter 30-40 mm) - helps to evenly lift the cover.
• 📏 Thin screwdriver (cross, 1.5 mm) - for unscrewing screws under the lid.
• 🧴 Isopropyl alcohol 90%+ — glue-residue.

If you do not have a thermophen, you can use a regular hair dryer, but you will have to heat the body longer (5-7 minutes instead of 2-3).°C: Higher values, you risk melting plastic latches or damaging the battery. Turn off your smartphone before you start. SIM-Memory card – heating can deform them.

⚠️ Warning: Do not use a knife or metal blades! even neat pressure will leave scratches on the aluminum frame, and when slipping, the tool can pierce the battery plume or display.

Work on a clean, flat surface with good lighting. It is advisable to cover the table with a soft cloth (such as a microfiber) so that the screen does not scratch when you turn the device over. If you take the smartphone apart for the first time, film the process on video, this will help to properly assemble it back.

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Before heating, paste the Redmi 7 screen with paint tape - this will protect it from accidental scratches with a mediator and prevent the suction cup from slipping.

Step-by-step: how to remove the cover without damage

The process of removing the back cover Xiaomi Redmi 7 consists of three steps: heating, separation of the cover and careful removal. Follow the instructions in strict order - skipping steps can lead to breakage of the latches.

1. Heat softening of the glue

Turn the dryer on to medium power (if you have a temperature adjustment, set 70-80°C). Direct the hot air flow to the edges of the back cover, heating them evenly in a circle for 3-5 minutes. Pay special attention to the corners - there the glue is applied thicker. To check readiness, slightly press the lid with your finger: if it is a little "playing", the glue softened.

2. Separation of the lid with a sucker and a mediator

Stick the suction cup closer to the bottom edge of the smartphone (where the USB-C connector is located). Gently pull it upwards, creating a small gap. Put a plastic mediator in the slot and slowly drive it along the edge, separating the latches. Don't try to rip the lid off abruptly - this will break the plastic fixtures!

If the lid doesn't respond, reheat the problem area with a hair dryer. If you heat it properly, the mediator should pass with a slight resistance. Once the gap is around the perimeter, you can lift the lid.

3. Complete removal of the lid

When all the latches are separated, carefully remove the lid, starting at the bottom edge. Be careful: it has a fingerprint scanner plume attached to it (if your model is equipped with one). To avoid breaking it, raise the lid to 45.° and disconnect the plume from the motherboard using a plastic blade.

Under the lid, you'll see:

• 🔋 Battery with connected connector.
• 📱 Motherboard closed with metal screen.
• 📡 Antenna modules (don’t touch them with your hands – they are fragile!).

Heated the body around the perimeter.|A plastic mediator is used.|Suction cup is glued to a smooth surface|Fingerprint plume disabled|The screws are not lost (if already unscrewed)-->

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling Xiaomi Redmi 7. We have collected the most common of them and ways to prevent them:

Critical error: trying to remove the lid without heating the glue, which in 90% of cases ends in cracks on the plastic or broken latches, which will require replacing the entire body.

Another common problem is the damage to the seal rubber around the camera and connectors, which protects the device from dust and moisture (although the Redmi 7 does not have an official IP certificate), and if the seal breaks, it can be replaced with a similar one from other Xiaomi models (for example, from the Redmi Note 7).

⚠️ Warning: If you see a bloated battery after you remove the lid, don't continue disassembling! Bloating indicates a risk of fire. Immediately take the device to the service center.

What to do after removing the cover: repair tips

When the lid is successfully removed, you will have access to the internal components of the Xiaomi Redmi 7.

• 🔄 Battery replacement: Disconnect the battery connector, then gently slap it with a plastic blade (the battery is glued) The new battery should have the same capacity (4000 mAh) and connector.
• 📶 Repair antenna plumes: If the network signal deteriorates, check the integrity of thin black tape antennas near the upper and lower edges of the board.
• 🧹 Dust cleansing: Use a soft brush or compressed air balloon. Don't blow with your mouth - moisture from breathing can oxidize contacts!
• 🔧 Replacement of the connector USB-C: Requires soldering, but the connector itself is inexpensive (about 200-300 rubles).

If you plan to disassemble a whole lot (for example, to replace the display), remember that there are 10 to 12 different lengths of screws hidden under the motherboard. Remember or photograph their location - improper assembly can lead to short circuits. Use a magnetic mat or cell organizer for convenience.

To replace the display or touchscreen, you need additional heating — the Redmi 7 screen is also glued around the perimeter. Use the same hair dryer, but warm on the front side, removing the glass protection (if any). Be careful: the display plume is very fragile and breaks at the slightest jerk.

Related: How to properly install the lid back

Installing the back cover is as important as removing it, and if you don't keep the sequence, the cover will wobble or fall into place. Here's the step-by-step instructions:

1. Clean the edges of the body from the remnants of old glue with isopropyl alcohol and cotton swab.
2. Apply a new glue (like a B-7000 or a double-sided smartphone tape) with a thin layer around the perimeter of the case. Don't overdo it, because excess glue can be squeezed inside and blocked latches.
3. Connect the fingerprint scanner plume (if it has been disconnected) and make sure it is not twisted.
4. Line the lid on the connectors and press it gently, starting at the top edge. The latches should click.
5. Warm up the edge of the cover with a hair dryer for 1-2 minutes for better fixation of the glue.

After assembly, put the smartphone under the load (for example, a thick book) for 10-15 minutes, this will help the glue evenly distribute. Do not turn the device on immediately - let the glue dry (at least 30 minutes).

If the lid after assembly still wobbles, the reasons may be as follows:

• 🔹 Not enough glue at the corners (add pointy and press again).
• 🔹 Broken plastic latches (replacement of the cover or body will be required).
• 🔹 The battery is curved (check if it lifts the lid from the inside out).

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If the Xiaomi Redmi 7 doesn’t turn on after assembly, check the battery and power plume connection first. 80% of the time, it’s them, not the motherboard, that’s the problem.

Alternative methods: when the cover is not removed

Sometimes, even after heating the Redmi 7 lid properly, it doesn't work.

• 🔨 Factory marriage (excess glue in some areas).
• 🌡️ Low temperature heating (especially important for cold rooms).
• 🔄 Re-assembly (if the lid has already been removed and used too much glue).

Alternative methods can be tried in such cases:

Method 1: Use of thread or line

Drain a thin kapron thread (like guitar strings) between the body and the lid, carefully saw it along the edge, as if cutting glue, which takes patience, but minimizes the risk of damage to the latches.

Method 2: Softening of the glue with solvent

Apply a few drops of acetone or white spirit to the edge of the lid (not on the screen!). Wait 1-2 minutes for the glue to become softer. Then try to re-plug the lid with the mediator. Don't overdo it: the solvent can damage the plastic and rubber seals.

Method 3: Contacting the Service

If the lid is not removed, and you urgently need repair (for example, replacing the battery), it is better to contact the service. The average cost of removing the lid in the workshops is 500-800 rubles. This is cheaper than buying a new lid (1500-2500 rubles) due to breakage during self-disassembly.

⚠️ Warning: If you use a solvent, work in a well-ventilated room and wearing gloves. Acetone vapors are toxic and getting on the skin can cause irritation.

Where to buy spare parts for Xiaomi Redmi 7

If you have damaged the lid or other components during the disassembly process, you can replace them.

When buying on AliExpress, pay attention to the seller's rating (at least 98%) and reviews with photos. Often Chinese parts may vary slightly in color or texture, but are functionally fully compatible. For original parts, look for the OEM or Original mark in the description.

If you buy a battery, make sure that the kit comes with a new adhesive layer for fixation, without which the battery will hang inside the case, which can lead to premature wear.

FAQ: Frequent questions about the dismantling of Xiaomi Redmi 7