The Xiaomi Redmi Note 4 is one of the most popular smartphones of 2017, but even after years, its owners face the need to repair: replace the battery, clean from dust or recover from a fall. The main problem is a non-removable back cover that is attached to glue and latches. Incorrect dismantling can lead to cracks in the case, damage to the plumes or tearing off the antenna contacts.
In this article, you will find a step-by-step photo instruction, a list of necessary tools and unique tips for disassembling without specialized equipment. We will also analyze the typical mistakes that beginners make and explain how to avoid damage. FPC-The fingerprint scanner plume is the most vulnerable part when disassembling the Redmi Note 4.
Preparation for disassembly: tools and security measures
Before you start removing the lid, make sure you have everything you need. The Redmi Note 4 (MTK and Snapdragon models) share the same body design, but differ in the location of some elements on the board. This does not affect the process of removing the lid, but is important for further repairs.
The main tools that will be needed:
- 🔧 Plastic mediators (2-3 - for gently putting the lid on. Metal tools can leave scratches!
- 🔥 Hair dryer or thermo-air station for softening the glue. Optimal temperature: 60-80°C.
- 🧲 Suction cups (2 pcs) - help to evenly pull the lid after heating. Diameter: 4-5 cm.
- 📏 A thin plastic card is an alternative to a mediator if it is not at hand.
- 🔋 Insulation or paint tape - for fixing disconnected plumes.
If you do not have a hair dryer, you can use hot water in the bag (temperature). ~70°C, by placing it on the back cover for 2-3 minutes, but this method is less reliable and only suitable for emergencies.
⚠️ Warning: Do not use sharp objects (knives, screwdrivers) to lash the lid! The risk of damage to the flexible battery plume or antenna contacts is more than 70%.
Step-by-step: how to remove the cover from the Redmi Note 4
The disassembly process takes 15-30 minutes depending on the experience. Follow the instructions strictly in order to avoid errors:
- Turn off your smartphone and remove it. SIM-map + Memory card (if installed) This will prevent short circuits when working with the board.
- Heat the back cover with a hairdryer for 2-3 minutes, keeping it at a distance of 5-7 cm.
- Place the suction cups closer to the bottom of the case (where the Type-C connector is located). Carefully pull up - if the lid does not lend itself, repeat heating.
- Insert the mediator into the gap and slowly lead it along the body, separating the glue. Start at the bottom edge and move counterclockwise.
- Remove the lid when all the latches are snapped. Don't make any effort -- if something's bothering you, check if there's any unseparated glue left.
After removing the cover, you will see:
- 🔋 Battery (stick to the body).
- 📱 The fingerprint scanner plume (fragile, attached to the board).
- 📡 Antenna contacts (thin metal strips around the perimeter).
☑️ Checklist before lid removal
Critical detail: the fingerprint scanner plume is attached to the lid with double-sided tape, and if it's not taken care of, it can break away from the board! If it does, you'll need a soldering station to reconnect.
Common Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling the Redmi Note 4, and here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Heat too much (over 90°C) | Deformation of the plastic case, detachment of antenna contacts | Use a thermometer or keep your hair dryer at a safe distance. |
| Finishing the cover with a metal tool | Scratches, plume damage, short circuit | Only plastic mediators or guitar mediators |
| Removing the lid without checking the latches | Breaking the plume of the fingerprint scanner or camera | Check all latches around the perimeter before final removal |
| Ignoring the fixation of plumes after disassembly | Poor contact, a broken scanner or camera | Fix the plumes with tape or special clips |
One of the most frustrating mistakes is that the antenna contacts are damaged, and they're thin metal strips glued to the lid, and if you're not careful, the contacts can stay on the hull, which can cause you to lose your network or damage your signal. Wi-Fi/Bluetooth.
⚠️ Warning: If the smartphone is no longer networking after assembly, check the integrity of the antenna contacts with a magnifier. If damaged, they can be restored with conductive glue (for example, Permatex).
💡
If the lid does not respond after heating, do not increase the temperature - it is better to repeat the procedure 2-3 times at intervals of 1 minute.
What to do after removing the cover: further actions
When the lid is successfully removed, you will be able to access the internal components of the Redmi Note 4. Depending on the purpose of disassembly, the following steps may vary:
- 🔋 Battery replacement: Disconnect the battery plume from the board (use a plastic mediator); tuck the battery in with a suction cup or double-sided tape; install a new battery with adhesive. B-7000.
- 🛠️ Dust cleansing: Use a soft brush and compressed air balloon. Wipe the board contacts with an alcohol tampon (90% alcohol). Pay attention to the speaker and microphone - they are often clogged with dust.
Repair of plumes:
- Check the integrity of the fingerprint scanner and camera plume.
- When cliffing, use a soldering station or conductive glue.
If you’re disassembling a smartphone to replace a display, remember: in Redmi Note 4, the screen and touchscreen are a single module. Attempt to separate them will result in sensor breakdown. Buy only original parts with the MDG6 article (for the Snapdragon version) or MDG5 (for the MTK).
How to check the original battery for Redmi Note 4?
Build a smartphone: how to properly seal the cover
After the repair is completed, seal the cover tightly to avoid dust and moisture.
- 🧴 Double-sided scotch 3M (0.5 mm thickness – securely fixes, but complicates future disassembly.
After assembly, check: