How to remove the back cover of Xiaomi Redmi Note 7 without damage: a complete guide with photos and videos

The Xiaomi Redmi Note 7 is a challenge that owners face when replacing a battery, repairing plumes or cleaning dust. The model, released in 2019, is still popular due to its reliability and maintainability. However, improperly dismantling the lid can lead to cracks in the case, damage to the adhesive layer or a break in the plume of the fingerprint scanner. This article is a step-by-step instruction with nuances that you won’t find in standard YouTube videos.

Many users mistakenly believe that a plastic blade and hair dryer are enough to disassemble the Redmi Note 7, and in practice, you need a specialized tool, knowledge of the location of the latches and accuracy — especially if you are doing this for the first time, we will analyze three methods of removing the lid (with heated, without it, and for “glazed” instances), and also tell you how to avoid the typical errors that cause the phone to stop turning on.

If your Redmi Note 7 is no longer warranty-worthy or requires urgent repair, follow our recommendations. If in doubt, you should contact the service center. Remember: 80% of self-disassembly damage is due to excessive heating of the case or the use of metal tools.

1.Preparation: security tools and measures

Before you start disassembling, make sure you have everything you need, and the absence of even one tool can cause permanent damage, such as chipping on a glass panel or breaking flexible plumes.

Here is the minimum set you will need:

• 🔧 Plastic blade (preferably a set with different thicknesses - from 0.1 to 0.5 mm). Metal mediators are not suitable!
• 🔥 Hair dryer or thermo-air station (power at least 1000 watts). Household hair dryer will not provide the desired temperature.
• 🧲 Suction cups (3-5 cm in diameter) It is better to use two for even distribution of effort.
• 📏 Plastic separators (you can replace guitar mediators, but they are less reliable).
• 🔋 Tweezers with curved ends - to disconnect the plumes.
• 🧴 Isopropyl alcohol 90%+ — glue-residue.
• 📱 SIM card or tray – to block moving elements inside.

Also, make sure that the workspace is clean and lit, free of crumbs or dust, and that you put a soft substrate on it, like a silicone mat, so you don't scratch the glass. If you're working for the first time, videotape it, and it helps you put the phone back together without any extra details.

⚠️ Warning: Do not use acetone or solvents to remove glue - they will damage the oleophobic screen covering.°C: This can melt plastic latches inside.

2. Methods of removing the lid: which one to choose?

There are three main methods of dismantling the back of the Redmi Note 7, depending on the condition of the phone, the availability of tools and your experience.

For most users, the first method is optimal (heated), it is universal and minimizes risks, the second method is only suitable if you are confident in your abilities or the phone has already been repaired, and the third method is used by professionals for "difficult" cases.

If your Redmi Note 7 was in water or fell from a height, the glue could lose its properties, in which case the cover may be removed unevenly - be prepared for additional difficulties.

💡

Before disassembling, completely drain the battery (up to 0%) and leave the phone off for 1-2 hours, which will reduce the risk of short circuit in case of accidental contact with the board.

3. Step-by-step instruction: remove the heated cover

This method is considered the safest, but requires patience. Follow the instructions strictly in order, without missing steps.

Step 1. Turn off the phone and remove the tray for SIM-map.

Make sure the device is off (press the power button for 10 seconds if it's hanging). Get out the SIM card tray - it may interfere when the lid is removed.

Step 2. Heat the body with a hair dryer.

Turn on the dryer at a medium power (temperature 60-70 ° C) and evenly warm the back cover for 2-3 minutes, holding it at a distance of 5-7 cm. Pay special attention to the edges - there are concentrated latches. Do not direct the flow of air on the screen!

Step 3. Put the suction cups on.

Place one suction cup closer to the bottom edge of the phone (above the Redmi logo), the second closer to the top (above the camera). Carefully pull up: if the glue softens, the lid will slightly rise.

Step 4. Put the plastic shoulder blade in.

Insert a blade into the gap, and slowly move it along the edge, separating the glue. Don't try to pull the lid off right away, you break the latches. Work in a circle, starting at the bottom corner.

Step 5. Remove the lid.

When all the latches are snapped, gently lift the lid. Be careful, it has a fingerprint scanner plume attached to it (if you have one in your model), unplug it with tweezers, pulling the connector, not the wires.

Is the fingerprint scanner's plume disconnected?|Are there any cracks in the lid?|All the slats are snapped (check visually)?|Are there any drops of glue left on the board?-->

⚠️ Warning: If the lid fails, don't force it! Go back to step 2 and warm it up for another 1-2 minutes. If you push too hard, you can tear off the antenna contacts or damage the screen frame.

Alternative method: unheated removal

If you don't have a hair dryer or you're afraid of overheating your phone, you can try the mechanical method, but it requires more care and is only suitable for phones where the glue is already partially dried.

Tools: plastic spatula, suction cups, tweezers.

Step 1. Start at the bottom corner.

Insert the blade into the gap between the lid and the case at the USB-Type C connector. Roll it carefully left-right to try to find a weak spot. Do not insert the blade deeper than 2-3 mm!

Step 2. Walk around the perimeter.

Once a gap appears, insert a plastic separator (or second mediator) and lead along the edge, the main task is to avoid missing the latches, which are located approximately every 1.5 cm.

Step 3. Separate the lid.

When all the latches are released, the lid will be removed with a characteristic click. Again, don't forget the fingerprint scanner plume!

This method takes longer and requires precision, and if you feel resistance, you better stop and use a hair dryer.

5. Common Mistakes and How to Avoid Them

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

• 🔥 Overheating of the body, if the temperature exceeds 90°C, plastic latches can deform. Use a thermometer or keep a hair dryer at a safe distance.
• 🔧 Using metal tools, mediators or screwdrivers scratch the body and can make contact with the board!
• 📱 The fingerprint scanner plume is glued to the cover, and if you pull it, it will break. Always check if the connector is disconnected.
• 🧴 If you don't remove the glue from the antenna contacts, the network signal will deteriorate.
• 🔋 Disassembly of charged battery, risk of short circuit in contact with board, always unload the phone before repair.

Another common problem is that the antenna lines are damaged, and they're located around the perimeter of the lid, and they connect to the board through spring contacts, and if you see the contacts bent, straighten them carefully with tweezers.

If the phone does not turn on after assembly, check:

• Is the battery connected (sometimes the plume leaves during assembly).
• Are the contacts closed on the board (look at the subject of foreign objects).
• Is the cover properly installed (if the latches are not clicked, the screen may not work).

💡

If the phone doesn't vibrate or the camera doesn't work, the plumes are probably gone, and in Redmi Note 7, they're attached with fragile latches that can be easily broken when assembled in a sloppy manner.

6. How to put the phone back: nuances

Building the Redmi Note 7 after repair is as much a process as parsing. Here are the key points that are often overlooked:

1. Clearing the contacts.

Before installing the cover, wipe the antenna contacts on the board and cover with alcohol. This will improve the network signal and Wi-Fi.

2. New glue layer.

If you use old glue, the lid will hold poorly. Buy a double-sided 3M 467 Scotch or a B-7000 glue and apply it in a thin layer around the perimeter. Don't put it in the speaker and microphone area!

3. Latch check.

Make sure all the plastic latches are in place, and if they break, the lid will play, and then you'll have to use more glue to fix it.

4. Test before final assembly.

Connect the battery and check:

• 📶 Does the network work (call the phone from another phone).
• 🔊 Is there a sound in the speaker.
• 📷 Does the camera and fingerprint scanner work.
• 🔋 Is the phone charging.

If all is well, gently press the lid and leave the phone under load (such as a book) for 1-2 hours to grab the glue.

7. When is the best time to contact the service?

Despite the fact that the Redmi Note 7 is considered repairable, there are situations when a self-examination is impractical:

• 💥 The phone fell into the water or was subjected to a strong vibration (for example, in the washing machine), in which case there may be corrosion inside, and disassembly without experience will only aggravate the problem.
• 🔌 Problems with the payment (not switched on, overheats, spontaneously reboots). DC Power Supply or Oscilloscope.
• 🔧 Replacement of chips (for example, PMIC It's a piece of jewelry that requires a soldering station.
• 📱 There's a crack on the screen that goes to the frame, and when you take it apart, it can break completely, and you have to buy a new module.

The cost of parsing in the service is usually 500-1500 rubles, depending on the region. If you doubt your abilities, you would rather pay for professional work than risk your phone.

Remember, Xiaomi warranty does not apply to phones with self-repair marks. If your Redmi Note 7 is still warranty, contact an authorized service center - even if the repair is paid, you will retain the right to free service in the future.

FAQ: Frequent questions about the Redmi Note 7