Why you need a protective glass and how it differs from film
The protective glass on Xiaomi Redmi 9 is not just an accessory, but a necessary element to keep the screen from scratches, chips and cracks. Unlike the film, which protects only from minor damage, tempered glass withstands impacts, prevents the display from breaking when falling and preserves the tactile sensation of the sensor. This is especially true for the Redmi 9, which occupies almost the entire front panel, the risk of damage increases significantly.
Many users mistakenly believe that installing glass is a simple task that anyone can do. However, in practice, 8 out of 10 attempts end in bubbles, dust under glass or improper positioning. In this article, we will analyze a step-by-step algorithm that guarantees a perfect result even for beginners. And you will learn how to choose quality glass and avoid the typical mistakes that spoil the appearance of a smartphone.
What kind of protective glass to choose for Xiaomi Redmi 9: types and characteristics
Not all glasses are the same, not only price, but also material, thickness, coating and even the shape of the edges. For the Redmi 9 with its 6.53-inch IPS LCD screen, it is important to choose a variant that does not distort the color reproduction and does not reduce the sensitivity of the sensor.
- 🔹 Standard tempered glass (0.2-0.3 mm) - budget option with basic scratch protection, suitable for daily use, but will not save from heavy impacts.
- 🔹 3D-The glass with rounded edges, which is the same as the Redmi 9, protects not only the flat part, but also the side faces.
- 🔹 Oleophobic glass, which repels fat and fingerprints, stays clean for longer, is ideal for those who use their phones on the street.
- 🔹 Impact-resistant glass (9H) — It can withstand falls from a height of up to 1.5 m.
When choosing, pay attention to the exact compatibility with the model. For example, the glass for the Redmi Note 9 will not work - it has a different cutout for the front camera. Also check the kit: the kit must contain a microfiber wipe, a cleaning spray (or wet wipes), a dust collector and a positioning frame (if any).
Preparation of the smartphone: how to clean the screen before installation
Screen cleanliness is 50 percent of the success of sticking glass, even microscopic dust or fat particles will lead to bubbles or detachments, and start by turning off your smartphone, so you avoid accidental touch and see all the contamination on the dark screen.
Cleaning algorithm:
- Remove old glass or film (if any) with a plastic blade or credit card. Do not use metal objects!
- Apply a spray on the screen to clean the displays (or a mixture of isopropyl alcohol and distilled water in a ratio of 1: 1).
- Use a dust collector (a sticky tape from the kit) to remove the remaining particles. Swipe them around the screen 2-3 times.
- Check the screen under bright light – if you see stains or dust, repeat the cleaning.
⚠️ Note: Do not use household chemicals (such as window washing products) – it contains ammonia that will damage the oleophobic screen covering of the Redmi 9.
Remove old coating |
Clean the screen with alcohol |
Remove dust with sticky tape |
Check the cleanliness under the light |
Turn off the smartphone-->
Step-by-step: how to glue a protective glass without bubbles
Now, to the most critical point, it's important to be careful and not rushed, and if you have a positioning frame, use it, it makes it easier to center. If you don't, follow these steps:
- Remove the protective film from the glass on one side only (the one that sticks to the screen).
- Carefully place the glass on the screen, combining the cutouts under the camera and the speaker. Don't press it right away - check the position first.
- Start gluing from the top (camera side) by gradually lowering the glass downwards, which will help avoid displacement.
- Use a plastic scraper or a bank card to kick the bubbles out from the center to the edges. Move with a little pressure.
- Make sure all the edges are tightly attached. If the glass isn't glued somewhere, gently lift it up and repeat the process.
If you have small bubbles left after installation, don't panic. Most of them will disappear on their own in 12 to 24 hours. Large bubbles (more than 2 mm) indicate dust intake, in which case you will have to glue the glass.
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If the glass "does not lie down" evenly, spray the screen Redmi 9 with water and soap (1 drop of soap per 50 ml of water) - this will allow you to adjust the position before the final fixation.
Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes that ruin the results, and here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Dust under glass | Bubbles, detachments, deterioration of appearance | Clean the screen in the room without drafts, use a dust collector |
| Disparity of cutouts | Camera lock/dynamics, unaesthetic appearance | Check the compatibility of glass with the Redmi 9 before buying |
| Pressing too hard | Cracks on glass, damage to the oleophobic screen covering | Press glass with moderate force, use soft tools |
| Use of non-original glue | Yellowness, detachment after 1-2 weeks | Buy glass with a factory adhesive layer (for example, brands Spigen, Belkin) |
Another common problem is incomplete edge fit, which happens when the glass is too big or too small for the model. Always check the exact size of the Redmi 9 screen: 164.9 × 77.1 × 9.1 mm, diagonal 6.53 inches.
⚠️ Warning: If the sensor becomes less sensitive after installation, it is likely that the glass is too thick (more than 0.4 mm.
What to do if the glass is broken or broken
Even high-quality glass can lose its properties over time, and if it's peeled off at the edges, try the following methods:
- 🔧 Superglue glue -- dot the edges on the back.
- 🔧 Using bilateral tape – cut thin strips and glue them under the exfoliated areas.
- 🔧 Complete glass replacement – if the detachment is strong, it is better to install a new one.
If the glass is cracked, it should be removed as soon as possible so that the fragments do not scratch the screen.
- Plug a wide scotch on the cracked glass and sharply yank - this will help remove large fragments.
- Remove the remains of the glue with isopropyl alcohol or a special means for cleaning displays.
- Before installing a new glass, be sure to check the screen for microcracks.
Can I use cracked glass?
Alternative ways to protect the screen Xiaomi Redmi 9
If the safety glass is not suitable for you (for example, due to the high price or complexity of the installation), consider alternatives:
- 📱 Hybrid film combines the properties of glass and film, thinner and more flexible, but less durable.
- 📱 Liquid glass (nanocoating) - applied as a polyrene, fills in microcracks and creates a protective layer. It lasts 6-12 months.
- 📱 Bumper case – does not protect the screen directly, but prevents contact with the surface when falling.
- 📱 Tempered film is cheaper than glass, but can withstand light shocks.
Each option has pros and cons: liquid glass, for example, doesn't distort color reproduction or feel on the screen, but it doesn't save you from severe mechanical damage, and hybrid film is cheaper, but you have to change it every 3-4 months.
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The protective glass is the most reliable way to protect the screen Xiaomi Redmi 9 from serious damage, but its effectiveness depends on the correct installation and quality of the material.