Smartphone security glass is not a luxury, but a necessity, especially for Xiaomi Redmi owners. 9 Pro with him. 6,67-lens-screen FHD+ And it's a tendency to get microcracked when you fall, and even a slight scratch on the display can ruin the experience of using the device, and it's going to cost you to replace the original glass at the service center. 3-5 Meanwhile, self-installation of high-quality protective glass takes no more than a thousand rubles. 20 minutes and cost 3-10 cheaply.
Many users are afraid of gluing glass at home for fear of bubbles, dust under the film or uneven fit. However, with proper preparation and adherence to the technique, the process is easier than it seems. In this article, we will examine all the stages from the choice of glass to the final polishing, and also reveal the professional tricks that are used by masters in service centers.
If you have previously encountered glass gluing on other Xiaomi models (such as the Redmi Note 8 Pro or POCO X3), be prepared for the fact that the Redmi 9 Pro requires a more careful approach due to the specific shape of the screen.
1.What kind of protective glass to choose for Xiaomi Redmi 9 Pro
Not all glasses are equally useful. For the Redmi 9 Pro, it is critical to choose a model with accurate cutouts for the speaker, camera and sensors, otherwise, after installation, you will encounter problems with screen sensitivity or image distortion.
- 🔍 Thickness: Optimal - 0.2-0.33 mm Too thin glasses (less than 0.2 mm) are worse protect against impacts, and thick (more than 0.5 mm) can worsen the responsiveness of the sensor.
- 🛡️ Durability: Look for markings 9H (The Mohs scale is the hardest, and these are the ones that can withstand scratches from keys and coins.
- 📏 Screen coverage: The Redmi 9 Pro will only be suitable for the Full Cover version with a cutout under the camera. Avoid black-framed glass, which visually reduces the screen.
- ☀️ Oleophobic coating: Quality glass should repel greasy finger marks. Check this by swiping over the surface with a dry finger - there will be no divorces on good glass.
Among the proven brands for Xiaomi stand out: Spigen Glas.tR EZ Fit (with easy-install system for beginners), AmFilm Ultra Glass (with increased impact resistance), Olixar Toughened Glass (with anti-reflective layer). Importantly, for Redmi 9 Pro, glass from Redmi Note 9 Pro - they have different notches under the camera!
Avoid markets and unverified sellers on AliExpress, where brands are often forged, and it is better to order from official websites or from stores with a guarantee, for example: Wildberries, Svyaznoy, MVideo, Amazon (for international buyers).
2. Tools and workplace preparation
Successful gluing is 80% pre-prepared.
- 🧴 Alcohol wipes (70–90% isopropyl alcohol) or microfibre tissue + spray-drink.
- 🧲 Magnetic or sticky tape for dust removal (come complete with glass).
- 💡 Bright lamp or flashlight – to see the specks on the screen.
- 📏 Plastic card or mediator for smoothing glass.
- 🧼 Scotch (paint) - for fixing glass when glued.
Organize the workplace:
- Choose a room with minimal air circulation (it is better to close windows and doors so that dust does not fly).
- Wipe the table with a wet and then dry cloth.
- Prepare all the tools so that they are at hand – after removing the factory film, you will have only 1-2 minutes before dust hits the screen.
⚠️ Warning: Do not use a household glass cleaner (such as Mr. Proper) - it leaves a greasy film! Only isopropyl alcohol or special wipes for electronics.
If the glass comes with a positioner sticker (a sticky frame for precise installation), practice sticking it to a flat surface beforehand. In the Redmi 9 Pro, because of the curved edges of the screen, the positioner can not hold well - in this case, use paint tape to fix.
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Before you stick it, turn off your phone and let it cool to room temperature. A warm screen attracts dust faster!
3. Step-by-step instruction: how to glue glass without bubbles
Now, to the most critical stage, follow the instructions strictly by step.
- Remove old protection. If you've already had glass or film on your phone, gently apply it to a plastic card from the corner. Don't use metal objects, they scratch the screen! The Redmi 9 Pro makes the factory film easy, but if it's boiling, moisten the edge with alcohol and wait 10 seconds.
- Screen cleaning. Rub the screen with an alcohol napkin in circular motions from center to edge. Then use a sticky tape to remove dust (swipe it 2-3 times over the entire surface). Hold the screen to the light — if you see particles, repeat cleaning.
- Glass check. Take the glass out of the package and check for defects. Put it on the phone that's off to make sure the cutouts match the camera and speaker. Redmi 9 Pro often comes across glass that's too wide for the camera, which is a marriage!
- Positioner sticker (if any) glue a sticky frame to the screen, aligning it with the edges, it will help to fix the glass evenly. If the frame is not, use paint tape: glue two pieces on the top and bottom of the screen so that they slightly protrude beyond the edges.
- Install the glass. Remove the protective film from the glass (only on one side!) Carefully apply it to the screen starting at the top and gradually lower it down. Don't press it, the glass must stick itself under the influence of electrostatics.
- Smoothing. Take a plastic card and, with gentle movements from center to edge, drive out the bubbles of air. If there are small bubbles left, don't worry, they will disappear in 12 to 24 hours.
After gluing, don’t turn on your phone for 10-15 minutes — let the glue grab. Then check the sensitivity of the screen in the Settings menu → Display → Touch Test.
Remove old protection |Displayed screen with alcohol |Dispose of dust with sticky tape |Tested glass for defects |Prepared positioner or scotch-->
4.Typical mistakes and how to avoid them
Even with a careful sticking, you can make mistakes that will ruin the results, and here are the most common problems and solutions.
| Problem. | Reason. | How to fix it |
|---|---|---|
| Bubble under glass | Dust or hair hit by glass, uneven pressure when smoothing | Carefully tuck the glass in from the corner and remove the dust with tape. |
| The glass doesn't stick around the edges. | The glue on the glass for the Redmi 9 Pro often doesn’t reach the curved edges of the screen. | Use glass with UV-glue or apply a drop of superglue around the perimeter (only for experienced ones!). |
| The screen responds poorly to touch | Too thick glass or poor quality glue | Remove the glass and replace it with a model with a thickness of 0.2-0.3 mm and Touch Accurate marking. |
| Rainbow divorces in bright light | Cheap glass without oleophobic coating | Replace the glass with a branded one (like Spigen or AmFilm). |
A critical nuance for the Redmi 9 Pro: Due to the sensor features, this glass CANNOT be glued onto an already installed film! Double layer of protection will lead to a floating touch and false touches.
⚠️ Warning: If the screen becomes sticky after gluing (for example, the keyboard presses itself), this is a sign that the glass is too thick or poorly glued to the edges, in which case it needs to be removed and replaced.
What to do if the glass breaks after a week?
5 How to remove old glass without damaging the screen
If you need to reglaze the glass or it cracks, remove it carefully.For the Redmi 9 Pro with its brittle AMOLED-In some versions (in some versions) this is especially important.
You'll need:
- 🔥 Fryer (to heat glue).
- 📎 Plastic blade or mediator.
- 🧴 Isopropyl alcohol (to remove glue residues).
Step-by-step:
- Heat the screen with a hair dryer 10-15 cm away for 30 seconds. The glue will become softer.
- Put a plastic blade on the corner of the glass, and if it doesn't lend itself, warm it up for another 20 seconds.
- Slowly pull the glass upwards with your second hand, or you will tear it off with the oleophobic screen cover!
- After removal, wipe the screen with alcohol to remove the glue residue. Repeat cleaning if necessary.
If the glass is cracked into small pieces, wrap your finger with tape sticky side outside and gently glue the fragments one at a time. Don't use tweezers - it can scratch the screen.
6. Alternative ways to protect the screen
If gluing glass seems too complicated, consider alternatives:
- 🧲 Flexible films made of hardened plastic (TPU). Cheaper glass, easy to glue, but only protect against scratches (not impacts.
- 🔄 Liquid glass (nano coating) is applied as a polyrene and forms an invisible protective layer that lasts 6-12 months, but will not save from cracks when falling.
- 🛡️ Cases with protruding side. If you don't want to glue the glass, choose a case with high edges (for example, Spigen Tough Armor), which will protect the screen when you fall face down.
For the Redmi 9 Pro, the best option is a combination of glass + cover with a side, which gives 90% protection against most damage.
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Glass + side-covered cover is the best protection for the Redmi 9 Pro, which prevents 95% scratches and 70% cracks from falling from a height of 1 meter.
7. Care for a protective glass: how to prolong his life
Even the strongest glass will last longer if properly cared for:
- 🧼 Clean the glass with a microfiber cloth without pile. Use alcohol wipes to remove greasy marks.
- 🚫 Avoid abrasive cleaning products (like toothpaste) - they erase the oleophobic coating.
- 🔄 Change the glass every 6-12 months: over time, the glue loses its properties and the protection weakens.
If you notice that the glass began to “go away” at the edges, do not pull with a replacement – dust will fall under it, and then it will be more difficult to remove it.
To check wear, swipe through the glass with a dry finger: if there is a greasy trace, then the oleophobic coating has worn off, and it is time to think about replacing it.