Why Xiaomi Redmi Note 12 is having problems – a full analysis of the causes and solutions

Xiaomi Redmi Note 12

In this article, we will look at the top 10 reasons why the Redmi Note 12 may malfunction, and give you step-by-step instructions for fixing it. From software bugs to hardware features, you will learn how to diagnose the problem yourself and what to do to get your smartphone back to normal, and we will focus on the unique “chips” of this model, which are often a source of misunderstanding.

If your Redmi Note 12 is slowing down, overheating, or is not behaving in a hurry, don’t rush to carry it for repair. In 80% of cases, it’s not the hardware that’s to blame, but the settings, firmware, or third-party apps, and we’ll help you figure out where to find the root of the problem and how to fix it with minimal time.

1.Overheating case: why the Redmi Note 12 gets hot

Overheating is one of the most common complaints of Xiaomi Redmi Note 12 owners, especially when used intensively. Unlike flagship models, budget smartphones are more likely to suffer from heat generation due to a less efficient cooling system.

The main causes of overheating:

• 🔥 Games or heavy applications: Snapdragon 4 Gen 1 (or Helio) G88 Depending on the modification) is not designed for long loads. Temperatures can rise to 45-50°C for games like Genshin Impact or Call of Duty Mobile.
• 📱 Background activity: Some applications (such as messengers or social networks) continue to consume resources even in a folded state. → Battery. → Battery utilization.
• 🔌 Charging and use at the same time: fast charging 33W It itself heats the device, and if you run a resource-intensive application, the temperature may exceed the norm.
• 🧊 Bad heat sink: Cases made of silicone or thick plastic block natural cooling.Remove the case and see if the temperature drops.

If the smartphone is heated even in standby mode, this may indicate a hardware malfunction (for example, a faulty battery or problems with the motherboard).In this case, it is better to contact the service center. CPU Monitor or built-in security utility → Device diagnostics.

⚠️ Warning: If the temperature is above 60°C, turn off the device immediately! Prolonged overheating can damage the battery or screen.

2.Fast battery discharge: what eats the charge

The Redmi Note 12 has a 5,000 mAh battery, but many users complain that it's too fast to discharge, and there are a number of reasons, from the wrong settings to battery wear. Let's look at where to look for the problem.

The first thing to do is to check the energy consumption statistics:

1. Go to Settings. → Battery → Battery utilization.
2. Look at which apps consume the most power, and if you're talking about messenger or social media, limit your background activity.
3. Note the Android system, which is that if it consumes more than 20 percent, it may be the firmware or virus that's to blame.

Other common causes:

• 📶 Constant network search: in areas with poor coverage, the smartphone spends a lot of energy maintaining the connection. SIM-map.
• 📍 Geolocation services: applications like Google Maps or Yandex.Maps are actively used GPS, Even when you're not using them, disable geolocation for unnecessary applications.
• 🔄 Auto-Update Apps: Google Play updates programs in the background by default. Disable this feature or allow Wi-Fi-only updates.
• 🌡️ Overheating or cold: temperatures below 0°C or higher than 40°C battery discharges faster.

If the battery is running out too quickly even after optimizing the settings, check its condition using the AccuBattery app. If the capacity has fallen below 80% of the nominal capacity, the battery needs to be replaced.

Disable Auto-Update Applications|Limit background activity of messengers|Turn on the dark topic|Disable geolocation for unnecessary applications|Check the temperature of the shell-->

3. Network connectivity problems: Wi-Fi and mobile internet

Unstable Wi-Fi or mobile internet connections are another common problem with the Redmi Note 12, with users complaining of communication interruptions, slow speeds, or inability to connect to the network, and in most cases, settings or software bugs are not to blame for hardware malfunctions.

First, check the obvious:

• 📶 Flight mode: sometimes it's switched on by accident. Make sure the airplane icon is turned off in the notification curtain.
• 🔄 Router reboot: If the problem is only Wi-Fi, reboot the router and smartphone.
• 📱 Settings SIM-maps: go to Settings → SIM-maps and mobile networks → Name of the access point (APN) Make sure that the parameters meet the requirements of your operator.

If the internet is slow or breaking down, try the following steps:

1. Reset network settings: Settings → System → Settings Reset → Reset settings Wi-Fi, mobile network and Bluetooth.
2. Update the firmware: sometimes network bugs are fixed in new versions MIUI.
3. Check Wi-Fi range: Redmi Note 12 supports 2.4 GHz and 5 GHz. If the router is running in 5 GHz mode and the smartphone is not connecting, try switching to 2.4 GHz.

If nothing helps, the problem may be in the antenna module or modem firmware, in which case only flashing through Fastboot or contacting the service will help.

⚠️ Warning: if after updating the firmware lost mobile Internet, check if the settings are not lost APN. Often operators send automatic settings – request them through the SMS (It is usually enough to send a message with the text "Internet" to a short number of the operator).

4 Camera Failures: Why Photos Are Blurred or Green

The 48MP Redmi Note 12 camera should theoretically take good pictures, but in practice, users are faced with artifacts, blurry or incorrect color reproduction, most often due to software settings or physical damage to the lens.

Common problems and their causes:

• 📸 Blurred photos: check if the lens is dirty. wipe it with a soft napkin. If the problem persists, the focus may have gone wrong (try restarting the camera app).
• 🟢 Green hue in the pictures: this is a well-known bug of some versions MIUI, Update your firmware or use third-party apps (e.g. Google Camera).
• 🔍 Autofocus doesn't work: try tapping the body next to the camera (sometimes helps when the mechanism sticks.
• 💡 Too dark: check the exposure settings in the camera app. HDR, which in some scenes obscures the picture.

If the camera stops working completely (it gives an error "I failed to connect to the camera"), try the following steps:

1. Clear the cache and data of the camera app: Settings → Annexes → Camera. → Warehouse → Clear cache/Clean data.
2. Check if another application blocks access to the camera (such as an antivirus or permissions manager).
3. Install alternative software, such as Open Camera from Google Play.

Important: if after a fall or impact the camera stopped focusing, do not try to disassemble the smartphone yourself! in the Redmi Note 12, the lens is attached to the board with a flexible plume that is easily damaged.

5. Hanging and lags: why the Redmi Note 12 brakes

Even with 4/6 GB RAM Redmi Note 12 It can slow down, especially after months of use, and it can range from overloaded memory to conflicts between applications, and it can help you get your smartphone back to speed.

The first thing to do is to release the memory:

• 🗑️ Close the background annexes: in MIUI There is a built-in task manager – swipe up and hold to see all open programs.
• 📱 Turn off animation: go to Settings → The phone. → Version. MIUI (Click 7 times to activate Developer Mode, then in Settings → Additionally. → For developers → Scale of animation and choose No animation.
• 🔄 Clear the cache: Settings → Warehouse → Clear the cache.

If the brakes appear after the firmware update, try rolling back to the previous version or resetting the settings:

1. Make a backup of the data through Settings → System → Backup.
2. Perform reset: Settings → System system → Resetting settings → Delete all data.
3. After reset, do not restore data from the backup immediately – check if there are any lags left.

If the problem hasn’t gone away, it may be the wear and tear of flash memory (especially if you often record videos in your flash drive). 4K). Check the memory status with the application AIDA64. If the number of rewrites (PE cycles exceeding 1000, it is time to think about replacing the drive.

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If your smartphone is slowing only in games, try turning on Game Turbo mode in the settings. MIUI. It optimizes resource allocation and disables background processes.

6.Screen problems: flickering, broken pixels, touch lags

Redmi Note 12 screen with full resolution HD+ And 120Hz should be a smooth image, but sometimes users will experience flickering, dead pixels, or sensor delays.

Possible causes of screen problems:

• 💡 Flickering at low brightness: this is a feature AMOLED-matrices (in models with AMOLED). Try to increase the brightness or turn on Reading mode in the screen settings.
• 🖥️ Broken pixels: If colored dots appear on the screen that do not disappear, it is a matrix defect.
• ✋ Sensor lags: sometimes delays are caused by a protective film or glass. Take it off and check the screen response.
• 🔄 Failures after the update: if the flicker appeared after the firmware update, try to roll back to the previous version.

To diagnose the screen, use the broken pixel test:

1. Go to Settings. → Screen. → Screen colors and style → Screen test.
2. See if there are any extraneous points on a monotonous background (black, red, green, blue).

If the screen reacts to late touch, try calibrating the sensor:

1. Enter the dialer code ##6484##.
2. Select the Sensor Test option → Touch Screen Test and follow the instructions.

⚠️ Warning: If vertical or horizontal stripes appear on the screen after the fall, do not press it hard - this can aggravate damage to the plume.

7. firmware bugs: why the Redmi Note 12 isn't updated or crashes into bootloop

Updates MIUI They're supposed to improve the smartphone, but sometimes they have the opposite effect: they get stuck on the logo, they fly out to the bootloop, they refuse to install an update, and we'll figure out how to avoid these problems and what to do if they already occur.

Frequent errors in updating:

• 🔄 "Failed to update: usually means that the firmware file is corrupted. Download it again or try to update via Fastboot.
• 📱 Hanging on the logo MI: This can happen if you interrupt the upgrade process. Hard Reset helps in most cases. + Vol Up for 10 seconds).
• 🔧 "Can't verify update" error: occurs when you try to install custom firmware. MIUI via Mi Flash Tool.

If your smartphone is stuck in a bootloop (cyclic reboot), follow the following steps:

1. Press Power + Vol Up to enter Recovery Mode.
2. Select Wipe Data → Wipe All Data (this will erase all data!).
3. After reset, try reinstalling the firmware through Fastboot.

To avoid problems with updates, follow these rules:

Charge the battery at least 50 times%|Connect to a stable Wi-Fi|Make a backup copy of the data|Don’t interrupt the update process.|After the update, reboot.-->

Critical information: if after a failed update, the smartphone does not turn on, and the screen is lit red light bulb - this is a sign of damage to the bootloader. EDL-Mode (requires an authorized Xiaomi account).

8.Problems with speakers and microphone: no sound or no hearing

If the Redmi Note 12 has lost speaker audio or the microphone is not working during calls, the reasons may be both software and hardware, starting with the simplest thing: checking settings.

What to do if there is no sound:

• 🔈 Check the volume control, sometimes it gets to the minimum. Press the volume button up.
• 🎵 Turn off Do Not Disturb mode: it can block all sounds. Check in the notification curtain.
• 🔌 Clean the headphone jack: If your smartphone thinks the headphones are connected, the speakers won't work.
• 🔄 Reset the sound settings: Settings → Sound. → Resetting settings.

If the microphone is not working during the call:

1. Check if the microphone hole is closed (usually located at the bottom of the case next to the connector). USB-C).
2. Switch to speaker and back during the call - sometimes it helps.
3. Install the Microphone Test app from Google Play to check the microphone's performance.

If nothing helps, the problem may be a hardware malfunction:

The microphone plume is damaged (often after falls).

- The audio codec is out of order (motherboard replacement is required).

- The contacts of the speaker have been oxidized (you need to disassemble the device and clean with alcohol).

⚠️ Warning: If the sound is gone after moisture, immediately turn off your smartphone and dry it in rice or silica gel for 24 to 48 hours!

FAQ: Answers to Frequent Questions about Xiaomi Redmi Note 12