Redmi Note 12 4G is one of the most popular smartphones of 2023, but it AMOLED screen vulnerable to falls and mechanical damage. Cracks, dead pixels or a non-functioning touchscreen are typical problems that owners face after unsuccessful contact of the phone with asphalt or the floor. In this article we will analyze all the nuances of replacing the display: from choosing the original module to step-by-step instructions with photos, as well as opening the secret why auto brightness may disappear after self-repair and how to avoid it.
The cost of replacing a screen varies from 3,000 to 12,000 rubles - it all depends on the type of display (original, copy, OEM), region and workshop. But a high price does not always guarantee quality: in 30% of cases after repairs in unofficial services, users complain about problems with the sensor or backlight. We analyzed reviews from forums 4PDA And Mi Community, interviewed the craftsmen and compiled a checklist that will help save time and money.
How much does it cost to replace the display on Redmi Note 12 4G in 2026
Price for a new screen for Redmi Note 12 4G depends on three factors: module type, region And repair method (independently or in the service). The table below shows current prices for June 2026:
| Display type | Module cost (₽) | Cost of work (₽) | Total price (₽) | Where to buy/replace |
|---|---|---|---|---|
| Original (Xiaomi) | 8 000 – 12 000 | 1 500 – 3 000 | 9 500 – 15 000 | Official service, AliExpress (with guarantee) |
| OEM (manufactured by Foxconn) | 5 000 – 7 500 | 1 500 – 3 000 | 6 500 – 10 500 | Verified services, eBay |
| Copy (A+, A) | 2 500 – 4 000 | 1 000 – 2 000 | 3 500 – 6 000 | AliExpress, local workshops |
| Used original | 3 000 – 5 000 | 1 500 – 3 000 | 4 500 – 8 000 | Avito, Yula, telegram chats |
⚠️ Attention: Cheap copies of the class C or B (price up to 2,000 ₽) often have problems with color rendering, brightness and touchscreen. According to user reviews, 40% of such screens appear after 2–3 months. yellow spots or backlight flickering.
Where is the best place to replace the display?
- 🏢 Xiaomi official service — 6 month warranty, but the price is 20–30% higher than the market. Suitable if the phone is under warranty.
- 🔧 Local service centers - 15–25% cheaper, but there is a risk of running into unscrupulous craftsmen. Check reviews on
2GISorYandex.Maps. - 🛒 Self-replacement - economical, but requires skills. The module can be ordered at AliExpress (shops
HONGKONG GOLDWAYorXiaomi Original Store).
- In the official Xiaomi service
- At a local workshop
- On your own
- I haven't decided yet
How to distinguish an original display from a copy: 5 key features
Screen counterfeits Redmi Note 12 4G found even in trusted stores. To avoid running into a low-quality module, pay attention to:
- Packaging - the original comes in sealed box with hologram Xiaomi and a QR code for verification. Copies often come in bubble wrap or a box without a logo.
- Cables and connectors — the original has gold-plated contacts, and the board on the reverse side has laser engraving
MI 2201117TG(model Redmi Note 12 4G). - Color rendition - turn your phone on Safe Mode (hold the power button → long tap on “Turn off”) and compare the colors with another Redmi Note 12. Copies often have a cool tone.
- Touchscreen - test for dead zones via the app
Touch Screen Test. For copies of classesA-and below there may be missing touches at the edges. - Brightness — the original AMOLED produces up to 1200 nits in peak mode. Copies rarely exceed 800 nits.
🔍 Lifehack: Before buying, ask the seller to make a video of the screen test through the application Screen Test (available in Google Play). Please note:
- 🎨 Color gradient — the original has smooth transitions, without streaks.
- ⚡ Backlight - no flickering at minimum brightness.
- 👆 Touchscreen — all 10 fingers are recognized simultaneously.
If the seller refuses to provide a video with the test, this is a reason to be wary. Often counterfeits are sold under the guise of "OEM" when in fact they are grade B copies.
Step-by-step instructions: how to replace the Redmi Note 12 4G display yourself
To replace the screen you will need:
- 🔧 Screwdriver set (cross
PH00, flat1.5 mm, pentaradialY00for loops). - 🧲 Sucker for removing the screen (diameter 5–7 cm).
- 📏 Plastic picks or guitar plectrums (for separating the body).
- 🔥 Hair dryer or hot air station (to soften the glue).
- 🧴 Glue B-7000 or double sided tape
3M 9448A(to fix the new screen).
⚠️ Attention: Do not use metal tools to pry up the screen - this will damage the cables! Also avoid overheating: the temperature of the hair dryer should not exceed 80°C, otherwise the battery will be damaged.
Turn off the phone and remove the SIM card|Remove the back cover (if necessary)|Unstick the battery (if you are changing the touchscreen cable)|Prepare your work area (clean surface, good lighting)-->
Step 1: Removing the old display
- Heat the edges of the screen with a hairdryer for 2-3 minutes, moving evenly around the perimeter.
- Use a suction cup to lift the display from the bottom edge (where the charging connector is). Insert a plastic pick into the resulting gap.
- Carefully move the pick along the entire perimeter, separating the screen from the body. Be careful in the area battery cable (top left)!
- Disconnect the display and touchscreen cables (they are secured with latches - pry them off with a flat screwdriver).
Step 2: Install a new display
- Check the functionality of the new module by connecting it to your phone before fixing with glue.
- Apply a thin layer of glue
B-7000around the perimeter of the case or use double-sided tape. - Install the display starting from the top and press firmly.
- Connect the cables and check the operation of the screen and touchscreen.
🛠️ Advice: If the touchscreen does not work after replacement, check:
- 🔌 Correct connection of the cable (it should click when fixed).
- 🔄 Reboot the phone (sometimes the system does not recognize the new module immediately).
- 📱 Firmware update (in rare cases, touchscreen flashing is required).
What should I do if after replacement the screen flickers or turns off spontaneously?
This is a common problem when using screenshots. The reason is the incompatibility of the backlight controller. Solutions:
1. Return the old display and check if the problem is still there (if so, the motherboard is faulty).
2. Update the firmware via Mi Flash Tool (download from official website).
3. Calibrate the screen through the engineering menu: enter in the dialer *#*#6484#*#* and select Manual Test → Display.
Top 5 mistakes when replacing a display and how to avoid them
Even experienced craftsmen sometimes make mistakes that lead to re-repair or phone breakdown. Here are the most common:
- Battery overheating - if you heat it with a hairdryer for too long, the battery may swell. Solution: heat in short intervals (30 seconds each) and check the temperature with your hand.
- Damage to the touchscreen cable - often occurs when the screen is removed carelessly. Solution: Use only plastic picks.
- Incorrect fixation with glue - if there is too much glue, it may get on the speaker or microphone. Solution: Apply a thin layer of glue around the perimeter.
- Using an incompatible display - for example, a module from Redmi Note 12 5G not suitable for 4G version. Solution: check the markings
MI 2201117TGon the train. - Forgetting to turn off the battery - this may lead to a short circuit. Solution: Always disconnect the battery cable before working.
⚠️ Attention: If after replacing the display your phone does not turn on or keeps rebooting, you most likely have damaged contacts on the motherboard. In this case, diagnostics in the service is required using microscope And soldering station.
The most common mistake made by beginners is incorrectly connecting the touchscreen cable. If after assembly the screen works but does not respond to touches, check whether the connector is upside down (there is a key mark on it).
Where to buy spare parts for Redmi Note 12 4G: verified sellers
The choice of store depends on your budget and waiting period. Here are the best options:
| Store/Venue | Display type | Price (₽) | Delivery time | Pros | Cons |
|---|---|---|---|---|---|
| AliExpress | Original, OEM, copies | 2 500 – 10 000 | 10–30 days | Low prices, wide selection | Long delivery, risk of counterfeit |
| Ozon/Wildberries | OEM, A+ copies | 4 000 – 8 000 | 3–7 days | Fast delivery, 14 days guarantee | Prices are higher than on AliExpress |
| Xiaomi Official Store | Original | 8 000 – 12 000 | 1–3 days | 6 months warranty, 100% original | Highest price |
| Local services (Avito, Yula) | Used original, OEM | 3 000 – 6 000 | 1 day | You can bargain, quick deal | Risk of buying a faulty module |
💡 Advice: When purchasing on AliExpress choose sellers with a rating of at least 98% and the number of orders from 1,000. Pay attention to reviews with photos - they often show screen defects.
What to do if problems appear after replacing the display
Even with correct replacement, problems may occur. Let's look at typical cases and ways to eliminate them:
- 🔦 The screen flickers or turns off spontaneously — the problem is in the backlight cable or controller incompatibility. Solution: check the tightness of the cable or replace the display with the original.
- 👆 Touchscreen works with a delay — the cable may be damaged or calibration is required. Solution: reconnect the cable or reset the settings (
Settings → System → Reset settings). - 🎨 Distorted colors or dead pixels - matrix defect. Solution: Return the display to the seller under warranty.
- 🔋 The phone runs out quickly - The new screen may consume more energy. Solution: Calibrate the battery (discharge to 0% and charge to 100% without interruption).
📌 Important: If after replacing the display the function disappears Always On Display (AOD), check:
- Is the option enabled in settings (
Settings → Display → Always On Display). - Does the new display support this feature (class copies
A-and below - no). - Is the firmware updated to the latest version (via
Settings → About phone → System update).
FAQ: Frequently asked questions about replacing the Redmi Note 12 4G display
Is it possible to replace the display yourself without experience?
Theoretically yes, but the risk of damaging the phone is high. If you have never disassembled smartphones, it is better to contact the service. Main difficulties:
- Peeling off the screen without damaging the cables.
- Proper fixation of the new display (if glue gets on the speaker, the sound will become quieter).
- Connecting cables (they are fragile and break easily).
If you decide to do it yourself, practice on an old phone or look video instructions on YouTube.
How long does it take to replace a display in the service?
In the official service Xiaomi — 1–3 days (if spare parts are in stock). In local workshops - from 30 minutes to 2 hours. The period depends on:
- Availability of a display (sometimes you have to order it).
- Difficulty of breakdown (if the motherboard is damaged, repairs will take longer).
- Service load.
Why doesn't my fingerprint work after replacing the screen?
Fingerprint scanner in Redmi Note 12 4G Built into the power button, not the display. If it stops working, the problem is not with the screen, but with:
- Damaged power button cable (often comes off during careless disassembly).
- Software failure (try resetting or flashing the phone).
- Mechanical damage to the button itself (replacement required).
Can I use a phone with a cracked screen?
It is possible, but it is fraught:
- 🩹 Injuries — glass shards can cut your fingers.
- 🔋 Battery damage - if the crack is near the battery, it may swell.
- 📱 Deterioration of touchscreen performance — Over time, the sensor may fail.
- 💧 Ingress of moisture — cracks break the tightness.
If the crack is small and does not interfere, seal it clear tape (For example, 3M Scotch) and use a case with enhanced protection.
Where can I find a disassembly diagram for Redmi Note 12 4G?
The official diagram can be downloaded from the website Xiaomi Repair (section "Documentation"). Also useful resources: