Replacement of glass with Xiaomi Redmi 4X at home: detailed instructions with nuances

Cracks on the screen Xiaomi Redmi 4X — The problem that almost every second owner of this smartphone faces is that the model that was released in 2017 is still in demand today because of its reliability and low price, but it's a very expensive model. 2.5D-If you decide to save money on a service center and replace the glass yourself, this article will help avoid the typical mistakes: from improper removal of the display module to the use of poor-quality glue that leads to detachment after a week.

We will discuss three key stages: preparation (including the choice of glass and tools), the replacement itself with photos of critical moments, and testing after repair. 4X, What is not considered in the universal instructions: for example, how not to damage the sensor plume or why you can not overheat the screen over 80°C. You will also find a comparative table of glass from different manufacturers and answers to questions that arise after replacement - from the calibration of the touchscreen to the restoration of water resistance.

If you don’t have experience in electronics repair, start by evaluating your strengths: Replacing glass with Redmi 4X It's a medium-sized repair, and you don't have to solder chips, but you need to be careful, patient, at least basic screwdriver skills. The main risk is to damage the matrix or plumes during disassembly, which will result in the purchase of a new display module (and this is already 3-4 times more expensive than the glass itself?

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

There are more than 15 options for Redmi glass on the market 4X, And their quality varies from "fall off in a day" to "indistinguishable from the original:

• 🔹 OCA-Optically Clear Adhesive – used in original glass, provides perfect transparency and strength, but requires a laminator to install (at home you can do with an iron or hair dryer).
• 🔹 LOC-Liquid Optically Clear is a hand-painted, liquid-like adhesive, cheaper, but harder to install: when distributed unevenly, bubbles form.
• 🔹 Bilateral Scotch - budget option, but lasts a maximum of 2-3 months, and over time turns yellow.

For Redmi. 4X squirt OCA-It's adhesive from Nillkin, Spigen or Orzly, and it comes with pre-applied glue, which makes it easier to install. 4X (santoni, not for Redmi 4/4A — They have different screen sizes (5" vs 5.5") and the shape of the cutout under the speaker!

⚠️ Note: If you are buying glass with pre-painted OCA-glue, check the shelf life on the package! Over time, the glue loses its adhesive properties. The optimal period is not older than 6 months from the date of manufacture.

2. Tools for replacement: what is necessary and what can be done without

To replace the glass with Redmi 4X You'll need a minimal set of tools, but you don't need to skimp on quality -- a cheap plastic mediator can break down and scratch the matrix:

• 🛠️ Set of screwdrivers (cross-haul) PH00 and flat 1.5 mm) for spinning the screws of the rear cover.
• 🔥 Hair dryer or heat tile - for softening the glue (optimal temperature: 60-80)°C) Do not use an open fire!
• 📱 Suction cups (2 pcs) - for removing glass. It is better to take with metal rings.
• 🧲 Mediators (plastic and metal) - plastic for separation of glass, metal for cleaning glue residues.
• 🧴 Isopropyl alcohol (90%+) — for degreasing the matrix and new glass.
• 🔍 Loop or microscope (optional) – will help to check the quality of the plume installation.

What NOT to buy:

• ❌ Chinese “repair kits” for 300 rubles. – They often come across blunt mediators and screwdrivers that will rip the screws of the screws.
• ❌ Superglue or cyanoacrylate – it is not designed for displays and can damage the matrix.
• ❌ Scotch instead OCA/LOC-Glue - the glass will fall off at the first fall.

Screwdrivers tested for magnetism (do not attract metal shavings)|

The dryer operates in the "hot air" mode (at least 60).°C)|

Suction cups tested on a smooth surface|

Isopropyl alcohol without impurities (transparent, odorless)|

Non-Burruff Mediators (check with your finger)-->

3. Step-by-step instructions: how to remove old glass without damage

This is the most important step. The mistake here will cost a lot: if you damage the sensor array or the sensor plume, you will have to buy a new display module (from 2500 rubles).

Step 1. Turn off the phone and remove the back cover

• Unscrew the two screws at the USB-Type C connector (they are hidden under the plugs).
• Carefully apply the lid to the plastic mediator, starting at the bottom corner. Don't force it, the lid is held on the latches.
• Unplug the battery plume (it's under the black tape) to shut off the phone and prevent short circuits.

Step 2. Heat the glass and separate it.

• Turn on the hair dryer at 60-70.°C and warm up the screen evenly for 3-5 minutes. Do not direct the air flow to one point for longer than 10 seconds - this can damage the matrix!
• Stick the suction cups to the top and bottom of the screen, pull up simultaneously until the glass starts to move away.
• Put a plastic mediator in the gap and slowly move it around the perimeter, separating the glass. Take your time! If the glue doesn't respond, warm it up again.

Step 3: Clean the matrix of glue residues

• Remove large pieces of glue with a metal mediator (hold it at an angle of 15-20).°, so as not to scratch the matrix).
• Moisten the lilac-free napkin with isopropyl alcohol and wipe the surface. Don't use cotton-coating discs - they leave a pile!
• Make sure there is no dust or glue on the matrix, repeat cleaning if necessary.

⚠️ Warning: If you see that the matrix cracked or went in waves after the glass was removed, then it is pointless to replace the entire display module, which happens if the temperature exceeds 90 when heated.°C or the mediator was injected too deeply.

4.Installation of new glass: nuances for Redmi 4X

The key here is to stick evenly without bubbles. OCA-glue, act like this:

Step 1 Preparing a new glass

• Remove the protective film from the inside of the glass (there may be two layers: the upper - transporting, the lower - glue).
• Degrease the outside of the glass with alcohol. Don't touch the glue surface with your fingers!

Step 2. Installation of glass

• Carefully place the glass on the matrix, combining the cutouts under the speaker and the camera.
• Turn on the hairdryer at 50.°C and warm the glass for 2-3 minutes, pressing evenly on the center.
• Place the phone under a press (for example, between two heavy books) for 1-2 hours.

If you use LOC-glue:

• Apply the glue to the matrix with a thin layer (you can use the plastic card as a racket).
• Install the glass and remove excess glue with a napkin.
• Warm up the screen with a hair dryer for 10-15 minutes at 40-50°C for polymerization.

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To check if the glass is evenly glued, light the flashlight at an angle, the bubbles will be visible as dark spots, if any, carefully lift the glass and repeat the installation.

5. Phone Assembly and Testing: What to Check First

After installing the glass, collect the phone in reverse order:

1. Connect the battery plume.
2. Set the back cover and twist the screws (do not pull!).
3. Turn on your phone and check right away:

• 📱 Touchscreen: swipe your finger all over the screen, and if there are dead zones, it means that the sensor plume is damaged or poorly connected.
• 🔊 Speaker: call the phone or turn on the video – the sound should be clear, without wheezing.
• 📶 Network and Wi-Fi: sometimes the antenna plume will go off when you disassemble.
• 🔋 Charging: Connect the charger – the phone must detect the cable and charge.

⚠️ Warning: If the phone doesn't turn on after assembly, check: Is the battery plume connected (it could have left when the lid was installed); is the contacts on the motherboard closed (look for foreign objects); is the display plume bent (this is a common assembly error). If the problem is not solved, disassemble the phone again and repeat the check.

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The most common mistake when building Redmi 4X — They forget to plug the sensor plume into the motherboard, which is small and black, and it's next to the battery. If the touchscreen doesn't work, check it first!

6. Frequent problems after glass replacement and how to fix them

Even if the replacement is successful, after a few days, you may experience unpleasant surprises.-5 problems and solutions:

7.Tips for caring for new glass: how to extend its life

To have glass on Redmi. 4X You have been here longer, follow simple rules:

• 🛡️ Use a cover with sidelines - it will protect the screen when falling on a flat surface.
• 🧴 Apply oleophobic coating once every 2-3 months (sold as a spray).
• 🚫 Don’t put your phone down with a screen, even 9H-glass is scratched by sand or keys.
• 🔋 Avoid overheating – do not leave your smartphone in the sun or near the battery.

If you notice that the glass has become more quickly dirty or microcracks appear, this is a sign that the protective coating has worn out, in which case you can either replace the glass or apply a new coating yourself (for example, Nano Liquid Screen Protector).

FAQ: Answers to Frequent Questions