The security glass on the Xiaomi Redmi Note 7 is not just an accessory, but a necessary protection for the smartphone screen. Even a small scratch can ruin the experience of use, and a crack on the display will turn into expensive repairs. But many users face the problem of how to paste the glass so that there are no bubbles, dust or displacement?
In this article, we’ll take a look at everything you need to know about choosing, preparing and installing a protective glass on the Redmi Note 7, learn what mistakes beginners most often make, how to avoid divorces, and why some glasses “go away” in a week, and most importantly, get a step-by-step photo instruction that will help you cope with the task the first time.
⚠️ Note: Redmi Note 7 has a 2.5D-rounded edges of the screen, so standard windows without edging may not cover the display completely!
1.What kind of protective glass to choose for Xiaomi Redmi Note 7
Not all windows are equally useful. Cheap AliExpress products often have low strength (3D or even 2.5D instead of 9H), are poorly adhesive and quickly covered with microcracks, and some branded kits are sold without the necessary tools to install.
Here are the criteria for the perfect glass for the Redmi Note 7:
- 🔹 Thickness 0.2-0.33 mm – thinner will not provide protection from impacts, thicker will worsen the sensitivity of the screen.
- 🔹 Firmness 9H — Minimum standard for protection against scratches with keys or coins.
- 🔹 Oleophobic coating – repels fingerprints (check before buying: on cheap glass it is erased in a month).
- 🔹 Full screen coverage for Redmi Note 7 fits the sized glass 6.3" (159 × 74 mm) and speaker/camera cutout.
- 🔹 Kit with tools - the presence of napkins, dust collector, stickers for positioning is required.
Among the brands tested are Spigen, Nillkin, Belkin, Xiaomi Original (but the latter is often forged), from budget brands - Brotect or Orzly, if you buy on official sites.
Important: Avoid black-edged glass, which visually reduces the screen and can interfere with swipes from the edges, except for UV-adhesive models (installed in services).
2.Phone Preparation: What to Do Before Sticker
80 percent of users fail to prepare the screen properly, and even one speck of dust under the glass will ruin the whole thing.
- Turn off the phone, so the screen won’t heat up and attract dust.
- Take off old glass or film. If it's cracked, use a scotch or plastic card to put the edge on. Don't push too hard, you can damage the oleophobic screen cover!
- Clean the display: 🧴 Wipe with a microfiber wipe (from the kit or for glasses). 🧴 Use alcohol wipes (70% isopropyl alcohol) to degrease. Don't take vodka or cologne - they leave divorces! 🧴 Apply alcohol to a napkin, not on the screen, to avoid leaking under the frame.
Take the dust away.
dust-collector
Check the lighting.
⚠️ Warning: If you have traces of old glue on the screen, remove them with a plastic card (not a knife!) or a special sticker remover. Acetone or solvents can not be used - they erode the oleophobic coating!
Turn off phone |Remove old glass/film |Microfiber |Defat with alcohol |Remove dust with sticky tape |Check the lighting-->
3. Step-by-step instruction: how to glue glass without bubbles
Now, to the most important stage, follow the instructions in strict order, without missing the steps:
Step 1. Positioning the glass
- 📱 Put the phone on a flat surface (table, substrate from the kit).
- 📱 Remove the protective film from the glass on one side only (adhesive).
- 📱 Combine the glass with the screen, focusing on the notch for the speaker/camera and edge. Some kits come with a positioning sticker — glue it first, then put the glass on top.
Step 2. Sticker.
- 👆 Carefully lower the glass on the screen, starting from the top (from the speaker side).
- 👆 If the glass "grabbed" on the edge, do not pull it up - raise and move again.
- 👆 After touching, do not move the glass - the glue is instantly fixed.
Step 3: Bubble removal
- 💨 Take a plastic card (or a special scraper from the kit) and drive the bubbles from the center to the edges.
- 💨 If the bubble doesn't go away, gently lift the nearest edge of the glass and press it back again. Do this for the first 30 seconds -- the glue will catch on later.
- 💨 Don’t push hard – you can move the glass or damage the display.
Step 4 Final check
- 🔍 Turn on your phone and check the sensitivity of the screen (especially around the edges).
- 🔍 Light the flashlight at an angle - so you can see even small specks of dust.
- 🔍 If you find a defect, remove the glass in the first 5 minutes (later it is more difficult to do it).
Video instructions (if visualization is required):
🎥 Watch on YouTube: Installing glass on Redmi Note 7
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If the glass doesn’t fall flat because of the Redmi Note 7’s rounded edges, try the option with flexible edges (like the Nillkin H+ Pro).
4.Typical mistakes and how to avoid them
Even with a nice sticker, you can make mistakes that will ruin the result. TOP-5 problems and solutions:
| Mistake. | Reason. | How to fix it |
|---|---|---|
| Bubble under glass | Dust, insufficient pressing, curved positioning | Re-glue in the first 5 minutes or use adhesive for glass (e.g. LOCA) |
| The glass is moving away at the edges. | Bad glue, greasy marks on the screen, humidity | Degrease the screen with alcohol, use glass with UV-glue (requires lamps) |
| Divorce and Rainbow Effect | Cheap glass without oleophobic coating, pressure at sticker | Buy glass with an oleophobic layer, do not rub it with napkins with pile |
| Poor screen sensitivity | Too thick glass (>0.33 mm), incorrect calibration | Select glass with a thickness of 0.2–0.3 mm, recalibrate the touchscreen to Settings → System → Additional → Screen calibration |
| The glass cracks on its own. | Low quality (3D instead of 9H), shocks or temperature changes | Buy glass with a chip guarantee (for example, Spigen Tempered Glass) |
The most common mistake is saving on tools, and many people try to do without a dust collector or alcohol, and then wonder why there is dust under the glass. The set costs 50 to 100 rubles, and resticking will cost 3 to 5 times more.
What to do if the glass is curved?
5 How to remove old glass without damaging the screen
If you need to reglaze the glass or it cracks, remove it carefully so as not to scratch the display.
- Heat the glass with a hair dryer (at minimum power, holding at a distance of 10 cm) or put the phone on a warm battery for 5 minutes. This will soften the glue.
- You can put a plastic card or a mediator on the edge, and start at the corner, and the glue is weaker.
- Pull slowly, pressing the card against the glass (not the screen!) If the glass is cracked, paste it with tape so the fragments don't fly apart.
- Remove glue residues with an alcohol napkin or a special remover (such as 3M Adhesive Remover).
⚠️ Warning: If the glass is cracked all over the surface, do not try to remove it with your bare hands - the fragments can cut your fingers. Use tight gloves or contact the service.
After the removal, be sure to check the screen for microcracks.
- 🔦 Light the flashlight at an angle - the cracks will reflect light.
- 🔦 Swipe your finger (easy!) across the display – if you feel leads, then there is damage.
6. Alternative ways to protect the screen
The safety glass is not the only option. Consider the alternatives and their pros and cons:
- 📱 Hydrogel (liquid glass) – applied as a film, but has a hardness of 6–7H. Pros: invisible, does not reduce sensitivity. Cons: protects only from scratches (not from impacts), lasts 6-12 months.
- 📱 UV-glass, installed with UV glue in the service, plus: perfectly repeats the shape of the screen, strength 9H. Cons: expensive (1000-1500) ₽), cannot be installed independently.
- 📱 Film (matte/gloss) is a cheap alternative. Pros: easy to glue, protects against scratches. Cons: not saving from blows, quickly covered with scratches.
- 📱 Bed cover, it raises the screen above the surface, pluses: it protects when you fall on the display, minuses: it doesn't save you from scratches on the screen itself.
When should you choose an alternative?
- 🔄 If you change glass frequently (for example, due to working in dusty conditions), the hydrogel will be more economical.
- 💰 If the budget is limited, the film combination + A cover with a side will give 70% protection for 20% of the price.
- 🛠️ If you are afraid to stick on your own, UV-Glass in the service - the best choice.
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Redmi Note 7 offers the best price and protection balance — 9H-glass + This combination will save the screen in 90% of falls.
7. Care for a protective glass: how to prolong his life
Even the strongest glass will last longer if properly cared for, and here are the rules that many people ignore:
- 🧼 Cleaning: use microfiber and distilled water (or special wipes for appliances.
- 🚫 Prohibited: cleaning products with abrasives (for example, GOI paste), paper wipes, clothing.
- 🔥 Temperature: Do not leave your phone in direct sunlight (e.g. on a torpedo in a car) – the glue can float".
- 📦 Storage: If you remove glass, put it in a hard case (not in a pocket with keys!).
- 🔄 Replacement: Oleophobic coatings wear off in 6-12 months, and if the glass becomes sticky, it's time to change them.
Lifehack to restore the oleophobic coating: if the glass has ceased to repel the prints, apply a drop of silicone oil (for example, to lubricate bicycle chains) and rub it with microfibre. The effect lasts 1-2 weeks.