Xiaomi Redmi Note 12 is one of the most popular smartphones of 2023, combining powerful hardware, stylish design and an affordable price. However, even the strongest glass Gorilla Glass 5 not insured against cracks if dropped or subjected to a strong impact. If your screen Redmi Note 12 covered in cobwebs or stopped responding to touches, do not rush to buy a new phone - in 80% of cases it is enough to replace only top glass with oleophobic coating, not the entire display module.
In this article we will look at:
- 🔍 How to determine that glass needs to be replaced and not the entire screen
- 💰 How much does repair cost in service centers and private craftsmen?
- 🛠️ Step-by-step instructions for self-replacement (with photos and videos)
- ⚠️ Typical errors that lead to damage to the matrix
- 🔧 Which tools and spare parts to choose for Redmi Note 12 Pro/Pro+/4G
Let us warn you right away: replacing glass with Redmi Note 12 - this is complex procedure, requiring accuracy and experience working with small parts. If you have never disassembled smartphones, it is better to contact the service. But if you decide to repair it yourself, our recommendations will help you avoid common mistakes.
How do you know that you need to replace the glass and not the entire screen?
It is important to diagnose the problem before ordering parts. B Redmi Note 12 (including models Pro, Pro+ And 4G) glass and matrix are glued together, but damage can only affect the top layer. Here's how to tell the difference glass crack from matrix damage:
- 📱 Glass only: Cracks or chips are visible on the screen, but the image is displayed clearly, the sensor works (possibly with delays). The colors are not distorted, the illumination is uniform.
- 🔴 Damaged matrix: Color stripes, black spots, flickering, or part of the screen does not light appear on the display. The sensor may not respond to touches in certain areas.
- ⚡ Touchscreen problems: if the glass is intact, but the sensor does not work, the cable or touch controller is to blame (diagnostics is required).
In 60% of cases when falling Redmi Note 12 Only the glass suffers, but the matrix remains operational. This allows you to save on repairs, since replacing glass is 2-3 times cheaper than completely replacing the display module.
⚠️ Attention: If after a fall the phone stops turning on or the screen is flickering, do not try to disassemble it! This could be a short circuit or a power supply failure. In such cases, professional diagnosis is required.
| Symptom | Possible problem | Is glass replacement necessary? |
|---|---|---|
| Cracks on the surface, but the image is clear | Only the glass is damaged | Yes |
| Colored stripes or black spots | Damaged matrix (AMOLED) | No, we need a new display |
| The sensor does not respond to touches | The touchscreen cable has fallen off or the controller is damaged | Diagnostics required |
| The backlight works, but there is no image | Problem with the matrix or cable | No |
- Cracks in glass
- The sensor does not work
- Color stripes on the screen
- The phone won't turn on
- Other
How much does it cost to replace glass on Redmi Note 12 in 2026?
The cost of repair depends on the model (Redmi Note 12 4G, Pro or Pro+), type of glass (original or analogue) and region. On average prices are as follows:
- 🔧 Original glass + work: 5,000–8,000 ₽ (in official services Xiaomi)
- 🛠️ High quality analogue + work: 3,000–5,000 ₽ (from private masters)
- 📦 Glass only (self-replacement): 1,500–3,000 ₽ (depending on the seller)
Important: in official services Xiaomi It is often suggested that the entire display module be replaced, even if only the glass is damaged. This increases the cost of repairs to 10,000–12,000 rubles. If you want to save money, look for masters who specialize in separation of glass and matrix.
Prices for spare parts for different models Redmi Note 12:
| Model | Original glass (₽) | High-quality analogue (₽) |
|---|---|---|
| Redmi Note 12 4G | 2 500–3 500 | 1 200–2 000 |
| Redmi Note 12 Pro (6.67") | 3 000–4 000 | 1 500–2 500 |
| Redmi Note 12 Pro+ (6.67", 120 Hz) | 3 500–4 500 | 2 000–3 000 |
⚠️ Attention: Cheap glasses (up to 1,000 ₽) often have a poor oleophobic coating and distort colors. After installing such glass, the sensor may work with delays, and the screen will quickly get dirty.
Where to buy spare parts:
- 🛒 AliExpress: wide selection, but long wait (2–4 weeks). Look for sellers with a rating above 98%.
- 🏬 Local stores: for example, FixPrice (not to be confused with a chain store!), Mobile-Store or Chip and Dip. Prices are higher, but you can check the quality before purchasing.
- 🔧 From the masters: many repairmen sell glass from stock. This is convenient if you plan to replace the glass from them.
Before purchasing glass, check its compatibility with your model! For example, glass for Redmi Note 12 Pro not suitable for Redmi Note 12 Pro+ due to different screen sizes and speaker hole locations.
Step-by-step instructions: how to replace glass on Redmi Note 12 yourself
If you decide to do the repairs yourself, prepare in advance. You will need:
Hot air gun or hair dryer (power at least 500 W)|Plastic picks (2-3 pcs.)|Suction cups for removing glass (diameter 3-5 cm)|T3 and T5 screwdriver for disassembling the case|Scalpel or sharp knife for prying glass|B-7000 glue or similar for gluing|Alcohol and lint-free wipes for cleaning|New glass (check compatibility!) -->
Step 1: Turn off your phone and remove the back cover
Before disassembling it is necessary turn off your phone and remove the SIM card from the tray. Then heat the back cover with a hairdryer (temperature ~60°C) around the perimeter for 2-3 minutes. Carefully pry the cover open with a plastic pick, starting from the bottom edge (where the charging connector is). Be careful - there are cables under the cover!
Step 2: Disconnect the battery
After removing the cover you will see the battery. Disconnect its cable from the motherboard using a plastic mediator. Never use metal tools - this may cause a short circuit! Also disconnect the display and touchscreen cables (they are located under the metal protection).
Step 3: Remove the damaged glass
This is the most difficult stage. Heat the screen with a hairdryer (temperature ~80°C) for 5-7 minutes, evenly moving over the surface. Then attach the suction cups to the glass and pull up. If the glass does not give way, carefully pry it up along the edges with a scalpel. The main thing is not to press too hard so as not to damage the matrix!
Step 4. Clean the matrix from any glue residue
After removing the glass, the old glue will remain on the matrix. Remove it with alcohol and a lint-free cloth. Do not use acetone or solvents - they may damage the polarizing layer! Also check if there are any shards of glass left on the screen frame.
Step 5: Install new glass
Apply a thin layer of glue B-7000 along the perimeter of the matrix. Carefully attach the new glass, aligning the holes for the speaker and camera. Press it down and remove any excess glue. To be safe, place the phone under a press (for example, between two books) for 1–2 hours.
Step 6: Reassemble the phone in reverse order
Connect the display and battery cables, install the back cover. Before final assembly, check the sensor operation and color display. If the screen works fine, you can turn on the phone.
What should I do if after replacement the glass comes off at the edges?
If after 1-2 days the glass begins to come off, it means that there was not enough glue or it was applied unevenly. Carefully pry the glass with a pick, add glue B-7000 and press again. Also check that there is no dust between the glass and the matrix - this can cause bubbles.
Common mistakes when replacing glass and how to avoid them
Even experienced craftsmen sometimes make mistakes that lead to additional expenses. Here are the most common problems and ways to prevent them:
- 🔥 Overheating the matrix with a hairdryer: If the temperature exceeds 90°C, the polarizing layer or cables may be damaged. Use a thermocouple probe or hold a hair dryer at a distance of 5–7 cm.
- 💥 Rupture of the cable when removing the cover: The battery cable and display are very fragile. Always pry the cover from the corner where there are no cables (usually from the bottom).
- 🧲 Dust getting between the glass and the matrix: even small particles cause bubbles and distort the image. Work in a clean area and use gloves.
- 🔧 Wrong glue: Cheap glue turns yellow or loses adhesion over time. Better to overpay for
B-7000orLOCA.
Another common mistake is glass incompatibility. For example, glass for Redmi Note 12 Pro not suitable for Pro+ due to the different sizes of the cutout for the front camera. Always check your phone model when purchasing spare parts!
⚠️ Attention: If, after replacement, the glass begins to “float” when pressed, it means that the glue is applied unevenly or the glass is not tightly glued to the frame. In this case, you will have to re-glue it again.
The most common reason for matrix failure when replacing glass yourself is damage to the cables or overheating. If you are not confident in your skills, it is better to entrust the repair to a professional.
Where is it better to repair: in a service center or on your own?
The choice between a service center and do-it-yourself repair depends on your experience and budget. Let's look at the pros and cons of each option:
| Criterion | DIY repair | Service center |
|---|---|---|
| Cost | 1,500–3,000 ₽ (spare parts only) | 5,000–12,000 ₽ (spare parts + labor) |
| Warranty | No (if you damage the matrix, repairs will be at your expense) | Yes (from 1 to 12 months) |
| Repair time | 3–5 hours (including glue drying) | 1–3 days (depending on workload) |
| Quality | Depends on your skills and tools | Professional equipment and experienced craftsmen |
Self-repair is justified if:
- 🛠️ You already have experience in disassembling smartphones.
- 💰 The budget is very limited and you are ready to take a risk.
- 🔧 You buy high-quality glass and glue.
You should contact the service if:
- 📱 The phone is under warranty (self-repair will void it).
- 🔴 Not only the glass is damaged, but also the matrix.
- ⚡ You are not confident in your abilities or are afraid of damaging your phone.
If you choose a service, give preference to official partners Xiaomi or a proven workshop with good reviews. Avoid “garage” services where they can install low-quality spare parts.
Frequently asked questions about replacing glass on Redmi Note 12
Is it possible to replace only the glass if the corner of the screen is cracked?
Yes, if only the glass is damaged and the matrix is intact (no color stripes or black spots). In this case, it is enough to re-glue the glass. However, if the crack is deep and has affected the matrix, the entire display module will need to be replaced.
How long does it take to replace glass?
The service takes 1–2 hours (if there is no queue). When replacing it yourself, it takes beginners 3–5 hours, since they need to carefully separate the glass, clean the matrix and wait for the glue to dry.
Why did the glass become less sensitive after replacement?
This can be caused by several reasons:
- 🔹 Poor quality glass with poor conductivity.
- 🔹 Incorrect installation (poorly glued, there are air bubbles).
- 🔹 Damage to the touchscreen cable during disassembly.
Try re-gluing the glass or contact a service center for diagnostics.
Can I use a phone with cracked glass?
Technically yes, but it comes with consequences:
- 🩹 Shards can hurt your fingers.
- 📉 Over time, the cracks will spread to the matrix.
- 💧 Moisture and dust will get inside, which will lead to corrosion of the contacts.
If the sensor works, it is better to stick on a protective film and replace the glass as soon as possible.
Where to buy original glass for Redmi Note 12?
Original glasses are sold:
- 🛒 In branded stores Xiaomi (but often only in combination with a matrix).
- 🌍 On AliExpress from trusted sellers (look for them marked "Original").
- 🔧 From official distributors of spare parts (for example, Mobile-Store).
Pay attention to the seller's reviews and ratings!