Modern smartphones like the Xiaomi Redmi 9 come with screens that require careful handling despite claims of glass strength. Consumers often opt for a version with an NFC module for contactless payment, forgetting that the electronics inside the case are sensitive to statics and bumps. Quality display protection is not just a film from scratches, but an important element that preserves the cost of the gadget when resold.
The process of installing a safety glass requires preparation of the workplace and understanding the design of the screen of your device. Errors at the initial stage can lead to bubbles or irregularities that will interfere with the use of the touch screen. In this article, we will discuss all the nuances that will help you perform the procedure professionally at home.
Special attention should be paid to the purity of the surface, as even a microscopic dust dust can spoil the result. Redmi 9 has a fairly large bezels around the display, which makes it easier to position the accessory, but requires accuracy when gluing the edges. Following the instructions will avoid typical errors of beginners.
Choosing the right protective glass for Redmi 9
The first step is to buy a quality accessory that will fit perfectly into your device. The market is full of offers, but it is important for Xiaomi to choose products with the right supply of adhesive layer. Cheap counterparts are often underthick or poorly oleophobic, which quickly negates all efforts.
Pay attention to the Redmi 9 NFC label, as the proximity sensors and the speaker may vary slightly between board revisions. The NFC antenna module in Redmi 9 is located at the top of the case, and poor-quality glass with metal spray can block the signal. This is critical if you plan to use contactless payment.
The optimal glass hardness should be 9H on the Mohs scale, which will provide protection from keys and small debris in the pocket, and it is also worth checking the presence of a black frame around the perimeter, which will hide possible flaws when sticking and protect the side faces of the screen from chipping.
- 📱 The presence of black edging for masking the edges and protection 3D-covering.
- 💎 Firmness 9H and oleophobic coating for comfortable slipping of the finger.
- 📡 The cutouts for the speaker and sensors corresponding to the models with NFC.
- 🧪 0.33 mm thickness to maintain touchscreen sensitivity.
⚠️ Warning: Avoid buying low-quality full-glue glass, as it often creates a “rainbow” effect on the display and degrades the brightness of the image.
Preparation of the workplace and tools
The success of the operation depends on the conditions in which you work, and choose a room with minimal dust and no drafts, because the villi from carpets or clothes can get under the glass at the most inopportune time, and the ideal place is the bathroom where you recently took a shower, and all the dust settled on the floor.
You'll need good lighting to see the smallest particles on the screen. Prepare a soft, non-flavory fabric made of microfiber, which usually comes complete with glass or glasses. Alcohol wipes are needed to degrease the surface, and sticky tape will help remove static dust.
Don’t forget to turn off your smartphone before the procedure so as not to accidentally touch the settings or unlock the screen with greasy fingers. It is also worth removing the case if it has high sides that can interfere with the smooth installation of the protective layer.
☑️ Preparation for the sticker
If you don't have a sticker kit, you can use regular stationery tape wrapped on your finger with a sticky side out, which will help you effectively collect dust particles from the surface of the display before you stick it.
Screen cleaning process before installation
The most critical step, which depends on the absence of bubbles: thoroughly wipe the screen with a wet alcohol napkin, removing all traces of fat, fingerprints and contamination. Movements must be confident, but without strong pressure on the display matrix.
Then use a dry piece of cloth or a separate wipe to dry the surface.Make sure there are no smudges left as they may manifest after the glass is installed.The oleophobic coating of your Redmi 9 should be completely cleaned for better grip.
The final touch is to work with sticky tape, and you can walk it all over the screen, collecting microscopic villi and dust particles that you can't see, and you can't ignore that, because it's the dust that causes the air pockets to appear.
⚠️ Warning: Never blow on screen with your mouth to blow off a speck of dust! microscopic droplets of saliva will settle on display and create indissoluble spots under the glass.
If you notice the villi after the start of gluing, you can try to gently lift the edge of the glass and scotch a dust duster with tape, but you need to do this extremely carefully.
Technology of the sticker: step-by-step instructions
Take the glass over the edges, trying not to touch the adhesive surface with your fingers. Combine the notches under the speaker and camera with the appropriate elements on the body of the smartphone. Xiaomi Redmi 9 has a symmetrical bezels, which makes it easier to center.
Once positioned accurately, you can smoothly lower the glass onto the screen, and it should stick from center to edge by itself, thanks to the silicone adhesive, and don't push hard in the center, but let the glue spread naturally.
What to do if the glass is crooked?
To remove the remaining air bubbles, use a plastic card or a special spatula that comes with it. The movement should go from center to edge, driving the air out. Pay special attention to the corners, because there are often micro-bubbles.
- 👀 Visually appreciate the centering in good side lighting.
- 👇 Smoothly lower the glass without moving it horizontally.
- 💨 Smooth from center to edge to remove air.
- 🔍 Check the fit of the edges around the perimeter.
⚠️ Warning: If the bubble is not mechanically removed and has a whitish hue, then dust has fallen in, and trying to squeeze it out will only lead to new defects.
Comparison of types of protective coatings
Users often face a choice between different types of protection, and understanding the differences will help you make an informed decision for your smartphone.
Tempered glass is better at protecting against impacts when falling, taking the energy of the impact on itself and breaking instead of the display. Hydrogel films are great at hiding small scratches and fit tightly to curved screens, but worse at saving from spot impacts.
| Characteristics | Tempered glass | Hydrogel film | Liquid glass |
|---|---|---|---|
| Impact protection | Tall. | Medium | Low. |
| Hiding scratches | No. | Yeah (self-tightening) | Partially. |
| Tactile sensations | Like a home screen. | A little softer. | Intangible. |
| Difficulty of sticker | Medium | Tall. | Low. |
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For maximum protection, combine methods: use quality glass, and carry your phone in your pocket separately from your keys to minimize the risk of chipping.
Remediation of defects and
Even experienced craftsmen sometimes have trouble installing. If you notice small air pockets around the edges, try to warm them up with a hair dryer at a minimum temperature for 10-15 seconds, and then press them down. The heat will make the glue more elastic.
If you get a large speck of dust in the center of the glass, you have to do wonders of accuracy. Use a thin needle or blade to slightly lift the edge of the glass above the speck of dust, and scotch the trash, and then press the glass immediately.
If the Redmi 9 has lost sensitivity in certain areas after the sticker, check if the protective glass touches the body elements or cover. Sometimes it is enough to just remove the cover or slightly move the glass if it has not already grasped.
- 🌡️ Warming up with a hair dryer helps remove micro-bubbles around the edges.
- 🧹 Removing dust with a needle requires a firm hand and good vision.
- 📱 Checking the touchscreen is mandatory immediately after installation.
⚠️ Warning: Do not use aggressive chemicals or acetone to clean already pasted glass, this can damage the oleophobic layer and plastic frame.
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The quality of the sticker directly depends on the cleanliness of the room and the thoroughness of degreasing the surface before installation.