How to remove the back cover on Xiaomi Redmi 7 without damage: a complete guide with photos and tips

Xiaomi Redmi 7 is one of the brand’s most popular budget smartphones, but even it’s not immune to breakdowns. Most often, users face the need to remove the back cover to replace the battery, repair the charging connector or clean up the dust. However, disassembling this device has its own nuances: fragile latches, glue mounts and the risk of damaging the fingerprint scanner plume.

In this article, you will find a step-by-step photo instruction, a list of tools you need, and a list of common mistakes that cause your phone to break, how to carefully separate the lid without damaging flexible cables, and what to do if the latches don’t lend themselves, and the instructions are suitable for all Redmi 7 modifications (including the Redmi 7A and Redmi Note 7, with their design features in mind).

Preparation for disassembly: tools and security measures

Before you start removing the back cover, make sure you have everything you need. The wrong tool is the main cause of plastic chips and plume breaks.

• 🔧 Plastic mediator or guitar mediator (thickness 0.3-0.5 mm) – for separation of cover and body.
• 🔥 Dryer or thermo-air station (temperature 60-80)°C) - to soften the glue.
• 📱 Suction (diameter 3-5 cm) - for the initial lid suction.
• ⚙️ Screwdriver. T3 or T4 — for the purpose of removing the stains (if necessary, complete disassembly).
• 🧴 Isopropyl alcohol (90%+) — glue-residue.
• 📦 Container for screws - so as not to lose small details.

If you don't have a thermophen, you can use a regular hair dryer, but keep it 10-15 cm away so you don't overheat the screen.The glue on Redmi 7 starts melting at temperatures above 50°C, but overheating above 90°C can damage the battery or display.

⚠️ Warning: Do not use metal blades or knives – they scratch the body and can close contacts on the board. Also avoid heavy heating of the area near the camera: there is a plume of the fingerprint scanner, which is sensitive to temperature.

Step 1: Turn off and warm up your phone

Before disassembling, be sure to turn off Redmi 7 and remove it. SIM-This will prevent short circuits and damage to the communications module:

1. Place the phone down on a soft surface (such as a towel).
2. Turn on the dryer at medium power and evenly warm the back cover for 2-3 minutes, paying special attention to the edges.
3. Check the temperature of the body with your hand - it should be warm, but not burning.

If you have a thermocouple, control the temperature: the optimal range for softening the adhesive is 60–75°C. Overheating above 80°C can warp the plastic or damage the lithium-ion battery.

Step 2: Separate the cover with a suction cup and a mediator

Now, to the most critical point, Redmi 7 has a lid attached to 12 plastic latches around the perimeter and glue base to remove it.

1. Stick the suction cup to the bottom of the lid (near the USB-C connector).
2. Carefully pull the suction cup upwards, creating a small gap.
3. Insert a plastic mediator into the slot and slowly lead it along the edge, separating the latches.
4. Repeat the procedure for all sides, starting with the lower one (it is less fragile).

If the lid doesn't lend itself, don't force it -- you better warm up the problem area again. On Redmi 7, the most vulnerable latches are located near the volume buttons and the fingerprint scanner.

⚠️ Warning: If you hear a characteristic crack, it's a snap. Stop disassembling, warm up the case again, try it from the other corner. B-7000, But it will take some extra time.

Step 3: Completely remove the lid and disable the plumes

When all the latches are disconnected, gently lift the lid. It will still hold on two plumes:

• 📱 Fingerprint scanner plume (upper part).
• 🔋 schleife NFC-antennas (if your model supports the NFC).

To disconnect them:

1. Put a plastic blade on the black print scanner plume connector.
2. Carefully pull the plume perpendicular to the board (do not pull sideways!).
3. If there is NFC, repeat the procedure for the second plume (it is usually white).

Now the lid is completely free. Place it on a clean surface with the inside up to avoid scratching.

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If the fingerprint scanner plume is gone, don't panic, it can be soldered back to the service center, and don't lose the little parts of the connector.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Redmi 7, and here are the most common ones and ways to prevent them:

• 🔥 Overheating of the hull → Use a thermometer or control the temperature with your hand. max 80°C.
• 🔧 Too fat a mediator. → Optimal thickness - 0.3-0.5 mm. thicker - risk of breaking latches.
• 📵 Dramatic disconnection of plumes → Pull only perpendicular to the board, not sideways!
• 💧 Liquor on the charge → Apply it only on the cover, not on the internal components.
• 🔋 Battery damage → Do not push it or puncture it - the risk of fire!

If you notice that the battery is swelling after removing the lid, do not turn on the phone or continue disassembling. The bloated battery can explode at the slightest mechanical impact, in which case contact the service center for safe disposal.

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The most common breakdown in a Redmi 7 disassembly is a broken fingerprint scanner plume, and to avoid this, only unplug it after the cover is completely separated from the body.

What to do after the lid is removed?

Now that the cover is removed, you can:

• 🔋 Replace the battery (original capacity - 4000 mAh, article) MB-J20).
• 📶 Clean the charging connector from dust and oxidation (use alcohol and soft brush).
• 🔊 Replace the speaker or microphone (they are attached to double-sided tape).
• 📱 Install a new camera (module mounted on 4 screws) T3).

If your goal is to replace the battery, remember that the new battery should be the same capacity and model. Using non-original batteries with a larger capacity (for example, 5000 mAh) can lead to overheating or incorrect operation of the power controller.

Once the repair is complete, reassemble the phone in reverse order. Warm it with a hair dryer (60°C) before installing the lid and press it gently to make the glue grasp. If the latches are broken, use B-7000 glue or 3M 9448A double-sided tape.

FAQ: Frequent questions about the dismantling of Xiaomi Redmi 7