Replacement of glass on Xiaomi Redmi 4: a detailed guide with photos and nuances

Broken glass on Xiaomi Redmi 4 is a problem faced by many owners of this budget but popular smartphone. Even a minor crack can eventually turn into a web that interferes with use, and fragments can injure your fingers or damage the display module. Self-replacement glass will cost 3-5 times cheaper than a service center, but requires accuracy and knowledge of key nuances: from choosing quality glass to the correct gluing with a touchscreen.

In this article, you will find a step-by-step photo instruction, a list of necessary tools, tips for disassembling Redmi 4 without damaging the plumes, as well as answers to frequent questions: how to avoid detachment of new glass, what to do if the sensor does not work after replacing, and how to distinguish the original glass from a fake. We took into account all the “pitfalls” of this model – from the fragile plastic case to the features of the mounting of the display module.

If you've never repaired a smartphone, don't worry: Xiaomi Redmi 4 is one of the most "friendly" models for beginners. The main thing is to take your time and follow a proven methodology. And for those who doubt their abilities, at the end of the article there is a checklist with criteria for choosing a workshop for professional repair.

1. Which glass to choose for Xiaomi Redmi 4: original vs analogues

The first and most important step is to buy quality glass. There are three types of glass for Redmi 4: original (from Xiaomi), OEM-The price difference can be as high as 500% (made in the same factories but without a brand) and Chinese replicas (cheap but often defective), but the savings on quality will result in re-repair in 2-3 months.

How do you tell the original? Notice that:

• 🔍 Marking: The original glass has a Xiaomi logo and serial number, applied with a laser (not a sticker!).
• 📏 Thickness: original 0.55-0.6 mm, cheap analogues are thinner (0.3-0.4 mm) and worse protect against shocks.
• 🎨 Oleophobic coating: on the original fingers slide easily, on the replicas there are greasy traces.
• 🔧 Set: in the box with the original are double-sided scotch 3M 9448A and a cleaning napkin.

The best options are official Xiaomi dealers (e.g. mi.com), trusted parts stores (AliExpress with seller rating 98%+) Avoid shopping in markets and dubious online stores, where Redmi glass is often sold. 4A or Redmi 4X, They are similar in appearance, but not suitable for connectors!

⚠️ Warning: Glass for Xiaomi Redmi 4 Pro (metal case model) is not compatible with the base version of Redmi 4! they have different display modules and mounts of the plumes.

2 Tools for glass replacement: what you really need

Redmi 4 glass replacement doesn’t require a 10,000 professional set ₽. Enough basic set, which will cost 500-800 ₽. Here is the minimum list required:

Additional useful:

• 🧴 Ultraviolet glue (e.g, LOCTITE 3321 - if glass with a glass 3D-edged.
• 🔦 Loop or microscope – to check the contacts of plumes.
• 📱 Screen Tester (Screen Test app from Google Play) – to check the touchscreen after replacement.

What NOT to buy:

• ❌ Metal mediators - scratch the body.
• ❌ Cheap superglue will ruin the touchscreen.
• ❌ Chinese sets for 200 ₽ — They often have dumb tools in them.

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Before starting work, remove all metal jewelry (rings, bracelets) from your hands - they can close contacts on the board when carelessly moving.

3.Preparation for replacement: dismantling Xiaomi Redmi 4

Before you take the glass off, you have to take the smartphone completely apart, which will protect the internal components from damage and make it easier to access the display module.

1. Turn off the phone and remove it. SIM-map + memory card (tray is on the right).
2. Remove the back cover, put it in the plastic mediator at the charging connector, and gently lead along the case. The lid is held on the latches, don't force it!
3. Unscrew 10 screws (Phillips #00) around the perimeter of the middle frame. Rotors of different lengths - remember which one from!
4. Disconnect the battery plume (use a plastic mediator to tamper with the connector).
5. Remove the motherboard, pre-disable all the plumes (camera, speaker, power button).

Now you have a display module (glass) in your hands. + touchscreen + A matrix that is attached to the body on double-sided tape. Don't try to tear the glass off right away.

Battery's off.|Motherboard removed|Removed the scotch from the plumes|Dryer and mediators prepared|Workplace is lit and clean-->

Removal of old glass: safety

This is the most critical stage. The errors here cause damage to the touch screen or the matrix, which will increase the cost of repair by 2-3 times.

Step 1. Heating the glass

• 🔥 Turn on the dryer at medium power (temperature 60–70)°C).
• 🕒 Heat the glass in a circle for 2-3 minutes, holding the hair dryer at a distance of 5-7 cm.
• 🚫 If the glass gets too hot (you can't hold your hand), let it cool for 30 seconds.

Step 2. Separation of glass

• 🧲 Stick the suction cup to the top of the glass (above the speaker).
• 🪛 Carefully pull up - the glass should separate from the touchscreen by 1-2 mm.
• 📱 Insert a plastic mediator into the resulting gap and slowly lead along the edge.

Step 3. Touchscreen cleanup.

• 🧴 Remove the glue residues from the touchscreen with isopropyl alcohol and a lilac-free wipe.
• 🔍 Check the integrity of the touchscreen plumes - they should be free of tears and contamination.

⚠️ Warning: If the glass cracks even more when you heat it, don't try to tear it out. Use a glass-cutting thread (sold in auto parts stores): slash it under the glass and saw it back and forth until the glue is softened.

Installation of new glass: glue and calibration

Now, we're going to put in a new glass, and it's critical to apply the glue right and avoid dust between the layers.

Step 1. Applying glue

• 📏 Cut out the bilateral scotch 3M 9448A along the circuit of the touch screen (leave the allowance of 1 mm).
• 🖌️ Remove the protective film on one side and gently glue the tape to the touchscreen.
• 🔄 Remove the second protective film – the surface is now ready to bond.

Step 2. Laying the glass

• 🧲 Apply new glass to the touchscreen, combining the holes for the speaker and camera.
• 🪨 Carefully press the glass around the edges, moving from the center to the corners (to avoid bubbles).
• 🔦 Check at an angle for gaps - if there are any, glue the glass.

Step 3. Touchscreen calibration

After changing the glass, be sure to calibrate the sensor, otherwise you may "miss" touches or false positives.

1. Install the Touchscreen Calibration app from Google Play.
2. Follow the instructions on the screen (usually press 5-7 points).
3. Reboot the phone.

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If after replacement, the glass "goes away" at the edges after 1-2 days, the reason is poor-quality glue or poor surface cleaning. 3M 9448A Tesa 61396 – cheap analogues do not hold glass when heated (for example, from the sun in the car).

6. Build the phone and check the health

Once the glass is installed, the Redmi 4 is assembled in reverse order.

• 🔧 Screw them cross-curl to avoid skewing the board.
• 📶 Trains: Make sure they are not bent (especially the camera plume).
• 🔋 Battery: Make sure the contacts are clean before connecting (wipe with alcohol).

After assembly, be sure to test:

• 📱 Display: Run a broken pixel test (Screen Test app).
• 👆 Touchscreen: check all areas for response (the edge is often "glutched»).
• 🔈 Speaker and microphone: Call another phone or record a voice note.

⚠️ Warning: If the phone doesn't turn on after assembly, check: Is the battery plume connected (frequent error!), is the contacts on the board closed (look under the magnifier), is the screws mixed (long screws can break the board).

7. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing glass with Xiaomi Redmi 4. TOP-5 problems and solutions:

If you encounter a problem that is not described in the table, don't panic. 90% of the time, it's because of:

• 🔌 Bad contact of plumes (reconnect them).
• 🧹 Dirt on board (wipe with alcohol).
• 🔧 Incorrect assembly (check screws and gaps).

FAQ: Answers to Frequent Questions