The screen of the Xiaomi Redmi Note 9 smartphone is the most vulnerable element of the device, which is at risk of mechanical damage every day. Even modern display technologies such as Gorilla Glass do not guarantee complete protection from falling keys in your pocket or accidental contact with sharp objects.
Many users are afraid to do this on their own, for fear of bubbles, dust particles under the layer of protection or displacement of the edges. However, if you strictly follow the technology and prepare the workplace, you can glue glass at home even better than in the service center, the main thing is not to rush and carefully monitor the cleanliness of the surface.
In this guide, we will discuss in detail the preparation process, the sticking procedure itself and methods for eliminating typical errors. Redmi Note 9 has rounded edges of the screen, which requires special attention when choosing an accessory and installing it. The right solution will not only provide protection, but also preserve the sensitivity of the touchscreen.
Before you start taking action, make sure you have a quality accessory that is compatible with your model. Cheap counterparts often have a poor oleophobic coating or an insufficiently strong adhesive base.Investing in a proven brand will save you from having to repeat the procedure in a couple of weeks.
Preparation of the workplace and necessary tools
The success of the operation depends on 80 percent on the preparation of the environment, and the main cause of defects is dust, which is abundant in the air and settles on sticky surfaces, and dust particles can cause inexorable bumps under the glass.
The ideal place to work is in a bathroom that just had a shower and the humidity is high, the water nails dust to the floor, and it does not fly in the air. If you do not have this option, choose a table by the window in the absence of a draft, before rubbing the surface with a wet cloth.
- 🛠️ Sticker kit: usually comes complete with glass (wipes, alcohol, sticky tape).
- 🏠 Wet cleaning: wipe the table and floor around the workplace to rule out dust sources.
- 💡 Lighting: Provide bright light to see the smallest villi and specks.
- 📱 Battery Charge: Make sure your phone is charged at least 20-30%, So he doesn't turn off in the process.
You'll also need a bright light source, and the lamp on the tabletop light will allow you to see even microscopic villi that you can't see in normal light, and you shouldn't ignore this step, because it takes longer to remove dust in the clean phase than it takes to prepare.
⚠️ Attention: Do not perform the procedure on carpets, sofas or surfaces with pile. Microscopic fibers of fabric instantly stick to the low-fat screen and create problems when installing.
Choosing a high-quality protective glass for the Redmi Note 9
The accessories market is crowded with offerings, but not all are equally useful for your Xiaomi.For the Redmi Note 9 model, it is important to consider the rounding of the edges of the display (2.5D). Full-screen glass with black bezel often looks more aesthetically pleasing, but can conflict with some cases.
Pay attention to the hardness of the material. 9H But hardness is not the only thing, and it's also the thickness of the layer: glass is too thick (>0.33 mm) may reduce the sensitivity of the touch screen, and too thin (<0.2 mm) will be less durable.
| Type of coating | Advantages | Deficiencies |
|---|---|---|
| Transparent | It doesn't hide the design, it's cheaper. | You can see chips on the edges of the screen. |
| Black-framed. | Hiding defects of edges, aesthetically | Maybe not be friends with covers. |
| Matte (Anti-glare) | No glare, nice slip. | Reduces the brightness and clarity of the picture |
| Private. | Hiding content from outsiders | Requires frequent calibration of brightness |
The oleophobic coating is what makes smartphone use comfortable, it pushes away greasy spots from your fingers and allows you to slip easily, and you can check for the coating by dripping water, and on a good glass, the drop will hold on to the dome, not spread out.
When buying, be sure to check the kit. The kit should include a wet alcohol wipe, dry microfiber fabric and dust-removing stickers (usually blue), the absence of any of these components will complicate the process or require a search.
How to distinguish the original glass from a fake?
Screen cleaning process before installation
This is the most critical stage of the whole procedure, and any remaining greasy film or dust that is invisible to the eye will ruin the result, and you first need to completely degrease the surface of the Redmi Note 9 display.
Take a wet wipe from the kit (usually marked with a number 1 or "Wet") and thoroughly wipe the screen in circular motions. Take no time for this step: degrease should be perfect. Pay special attention to the corners and area around the speaker, where the most dirt accumulates.
Then use a dry cloth (marked with the number 2 or "Dry"). Your task is not just to wipe the liquid, but to polish the surface to a state of "sterile cleanliness." Light the flashlight from different angles: if you see divorces, repeat the procedure.
- 💧 Wet cleaning: removes greasy traces and major contaminants.
- ✨ Dry polishing: removes divorces and static electricity.
- 🧹 Dust Removal: Use sticky tape (dashed line on packaging) to collect micro-particles.
The final touch is to use a sticky tape (usually the blue sticker number 3), and then you can walk it all over the screen, just slapping it a little bit, and it'll collect the microscopic villi that you might have left behind after drying, and they're the ones that cause the bubbles most often.
⚠️ Attention: After the dry wipe phase, it is strictly forbidden to touch the surface of the screen with your fingers. Fat marks from the skin instantly disrupt the adhesion of the glue and create visible spots.
☑️ Screen preparation checklist
Technology of gluing: step-by-step instructions
When the screen is perfectly clean, there comes a moment of truth. Don't take the protective film off the glass right away! First try on the glass on the smartphone that's off to see how it will lie relative to the speakers and the camera. Make sure the cutouts match.
Now the most important thing is, bend the protective film off the adhesive layer about to the next level. 1-2 You can use a centimeter on one edge (usually at the bottom where there are no cutouts) and carefully align that edge with the body of your phone.
Once the bottom edge is fixed, slowly lower the glass onto the screen, swipe your finger or plastic card from the center to the edges, squeezing air. The movements should be smooth. The glue layer will spread out over the surface itself if you don't go up.
Sequence of action:
1. Combine the bottom end.
2. Set the position.
3.Put the glass down smoothly.
4. Smooth from center to edge.If you use the "guide" method (when you stick tape strips on the sides to fix the position), the risk of displacement is minimal. However, for the Redmi Note 9, a confident hand is often enough, since the shape of the body helps you navigate.
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The key to success is not to glue the glass all at once, but start at one end and gradually lower it, controlling the process.
Elimination of bubbles and installation defects
Even professionals sometimes have pockets of air, and if you see a bubble of air, but there's no dust inside, you can kick it out, and you can take a plastic card wrapped in a soft cloth, and you can force it from the center of the bubble to the nearest edge.
It's more difficult if you get dust under the glass, and in this case, just squeezing it out doesn't help, it leaves a bump, you need a thin needle or pin, and you need to gently tuck the edge of the glass next to the dust, creating a micro-gap.
- 📌 Tool: Use a thin needle or clip.
- 💨 Blowing: Dramatically blow into the resulting gap to blow out a speck of dust.
- 👆 Press: Press the glass with your finger right away so it sticks back.
You have to act quickly and carefully so that you don't get any new dust, and if you can't remove the dust, you can leave it, and over time, the glue may leak a little, and the defect will become less noticeable, although it's not guaranteed.
Small air bubbles at the edges that cannot be removed immediately often disappear by themselves during the course of a short period of time. 24-48 The adhesive layer continues to polymerize and fill the voids, so you don't have to push the edges too hard to damage the matrix.
⚠️ Warning: Never use sharp metal objects (scissors, blades) to squeeze bubbles directly through glass.You can scratch an oleophobic coating or, worse, push the display matrix.
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If a large villi is hit under the glass that cannot be blown out, try to gently move it to the edge of the screen with a needle, without peeling off the glass completely.
Final stage and quality control
Once the glass is glued and the bubbles removed, you need to give it time to grab it. Although modern adhesives fix instantly, complete adhesion takes several hours, during which time it is better not to put on the cover, so that the sides do not create pressure on the edges.
Check the touchscreen. Do a multi-touch test by moving the icons around the screen, including the edges. On the Xiaomi Redmi Note 9, the sensitivity should be 100%. If there are "dead zones," it may be too thick or defective.
Rub the outer surface with dry cloth once again to remove fingerprints left during the installation process. Now your smartphone is protected. With proper care, quality glass will last the entire life of the device, taking the blows on itself.
Check the edges of the glass regularly. If there are chips that scratch your finger or interfere with swipes, the glass is better replaced. The cracked protective glass loses its strength and may be worse to hold the impact the next fall.