The security glass on the Xiaomi Redmi 7 is not a luxury, but a necessity. Even a small scratch on the screen can ruin the experience of using a smartphone, not to mention the deep damage that leads to a replacement display. However, many users face the problem: after self-installed, bubbles, dust or it peels off after a couple of days.
The fact is that the sticker process requires not only accuracy, but also knowledge of nuances. For example, 90% of bubbles are due to improper surface preparation or the use of poor materials. In this article, we will analyze the step-by-step instructions with a photo, talk about typical errors, and give proven life hacks that will help to paste the glass perfectly the first time — even if you do it for the first time.
What kind of protective glass to choose for Xiaomi Redmi 7
Not all glasses are equally useful. For the Redmi 7, it's important to find a model that matches the screen size exactly (6.26 inches with a cutout under the camera) and has the right curvature.
- 📏 Exact dimensions: glass must cover the entire display, but not go beyond its edges, otherwise, when pressed on the edges, it will peel off.
- 🛡️ Mohs scale hardness: optimal 9H — This protects against scratches with keys or coins in your pocket.
- ⚡ Oleophobic coating: quality glass repels greasy finger marks like the original screen.
- 🔍 The cutout for sensors: on Redmi 7 it is important that the glass does not overlap the light sensor and speaker (otherwise there will be problems with autobrightness and sound).
The brands we've tested include Spigen, Nillkin and Belkin, and the budget options are well-established, with Xiaomi Mi Protective Glass (original) perfectly sized, but harder to find. If you're buying on AliExpress or Wildberries, be sure to read the reviews with photos: Chinese vendors often indicate the wrong size.
⚠️ Note: Do not use glass with rounded edges ("3D") For Redmi 7, they are designed for flagships with curved screens (such as the Mi 11). On a flat Redmi 7 display, such glass will peel off on the sides.
Preparation for installation: what will be needed
Before you start, prepare everything you need, and the use of the wrong tools is the main cause of bubbles and dust under the glass.
- 🧴 Alcohol wipes (or isopropyl alcohol) + Vodka or cologne won't work, they leave divorces.
- 🧹 Scotch bracelet (sticky tape to remove dust) can be replaced with wide stationery tape, but it is less effective.
- 💨 A compressed air canister (to blow dust out of the speaker and connectors) Don't use a hair dryer, it creates static electricity.
- 📱 New protective glass (with a set: wet/dry wipes, positioning sticker).
- 🔦 Bright lamp or flashlight – to see the specks on the screen.
Also make sure that the room is draft-free (dust even flies from the fan), and hands are clean and dry. If you have long nails, it is better to wear gloves - they often cling to a sticky layer of glass.
☑️ Checklist before installation
Step-by-step: how to glue glass without bubbles
Now, the most important thing is to follow the instructions carefully, because every step is important, and if something goes wrong, don't try to fix the glass after you stick it out, you have to remove it and glue it back.
Step 1: Screen cleaning
Remove the old glass (if any) and clean the screen thoroughly:
- Wipe the display with a wet alcohol wipe to remove fat and dirt.The movements should be straight (top down), not circular.
- With a dry wipe, remove any moisture from the kit. Hold the screen to the light, and if you see any swelling, repeat the procedure.
- Use a scotch bracelet to remove the microparticles of dust. Press it against the screen and sharply tear it off. Repeat 2 to 3 times.
- Blow the speaker and connectors with compressed air - dust from there can get on the screen when you stick it.
Step 2: Positioning the glass
Carefully remove the glass from the package, holding it by the edges (do not touch the adhesive side!). the kit usually has a positioning sticker - it helps to accurately place the glass:
- Stick the positioner on the screen (it looks like a frame with a sticky side).
- Take the protective film off the glass and place it gently on the positioner.
- Make sure that all the cutouts (under the camera, speaker, sensors) match. If not, correct the glass before it touches the screen.
- With a light press on the center, glue the glass, then remove the positioner, pulling it to the side.
Step 3: Removing Bubbles and Final Check
If after the sticker there are small bubbles, they can be removed:
- Take a plastic card (or a special scraper from the kit).
- Carefully squeeze the bubbles from center to edge. Don't press too hard, you can move the glass.
- If the bubble doesn't disappear, it means there's a speck of dust under the glass, and then you're going to have to glue it back.
After installation, check the sensitivity of the screen: run the keyboard and press all corners. If any areas do not respond, the glass is not glued correctly (possibly blocked sensor).
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If the glass is unstuck at the edges after a day or two, don't be in a hurry to change it. Try to warm the edges with a hairdryer (at minimum power) and press it down. The adhesive layer can "get in place."
Common Mistakes and How to Avoid Them
Even the most experienced users sometimes make mistakes, and here are the most common problems and solutions.
| Mistake. | Reason. | How to fix it |
|---|---|---|
| Bubbles around the edges of glass | Dust or hair is covered by a sticky layer | Remove the glass, clean the screen and re-glue it, use a scotch bracelet before installation. |
| The glass is peeled off in a week. | Low-quality glue or greasy marks on the screen | Buy glass with UV-glue (requires an ultraviolet lamp) or use the original. |
| Rainbow divorces on screen | Glass too thin or without oleophobic coating | Replace with glass with a hardness of 9H and a proven brand. |
| Autobrightness is not working. | Glass override the light sensor | Cut the glass in the sensor area or buy a model with an accurate cutout. |
Another common problem is that the glass is detached in the speaker area, and it's caused by vibrations in the conversation, solution: Before the sticker, warm the glass slightly with a hair dryer (not higher than 40°C) so that the glue becomes more elastic.
⚠️ Warning: If the screen becomes less sensitive after installation, check if the touch tracks are blocked. On Redmi 7, they run along the edges of the display - the glass should not go beyond the screen boundaries.
What to do if the glass is curved
If you notice that the glass has shifted or there is dust under it, don't try to fix it, it will only make the problem worse.
- Carefully tuck the glass with a plastic card or a mediator (not a knife!) Start at the corner where it left.
- If the glass doesn't lend itself, warm it up with a hair dryer at minimum power for 10-15 seconds. The glue will soften and it will be easier to remove.
- After removal, clean the screen thoroughly of glue residues. Use alcohol and lilac-free fabric. Isopropyl alcohol dissolves glue better than vodka.
- If there are sticky marks on the screen, wipe it with a napkin dipped in a solution of soap and water (1:1), then dry.
Some glass (especially cheap) leave behind yellowish glue stains that can be removed with toothpaste (not gel!): apply a little on the fabric, rub the stain in circular motions, then wash off with a wet wipe.
How to remove the glass if it cracks?
Alternative methods of installation
If the standard method is not suitable (for example, you are afraid to stick a curve), you can use alternative methods:
- 💧 Wet method: the screen and glass are wetted with soap solution (1 drop of liquid soap per 100 ml of water) This allows the glass to move until it is perfectly set. Once dry, the glue is captured. Minus: the risk of moisture falling under the screen.
- 🔦 UV-glue: glass with this glue requires an ultraviolet lamp to polymerize, plus a reliable fixation, minus a high price and the need to buy a lamp.
- 🤖 Automatic installation: some service centers have machines that stick glass without bubbles, cost more, but guarantee the result.
For the Redmi 7, we don't recommend the wet method -- it has a leaky display, and moisture can leak in, and it's better to practice on old film or buy cheap glass for a trial.
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If you've never glued a glass before, practice on an unnecessary film or cheap glass, which will help you feel the process and avoid errors on the main glass.
How to extend the life of protective glass
Even the best glass will last longer if you take care of it properly.
- 🧼 Clean the glass regularly with microfiber cloth. Don't use paper wipes - they scratch.
- 🚫 Avoid pressing the edges of glass (for example, when you put your phone down with the screen.
- 🔋 Don't put the glass on the cold screen. If the phone comes in from the cold, let it heat up to room temperature.
- 🛠️ Change the glass at the first deep scratches. They reduce strength and can lead to cracks.
The average life of glass is 6-12 months, and if you notice that the oleophobic coating has stopped repelling your finger marks, you should consider replacing it, and the glass loses its protective properties after a strong impact, even if you can't see cracks.