Why Xiaomi Redmi Note 7 hangs: a full analysis of the causes and solutions

Your Xiaomi Redmi Note 7 suddenly stopped responding to touch, "thinking" when opening applications or even "gets into a stop" with a black screen? 2019 Despite the Snapdragon processor. 660 and 3/4 GB of RAM, the smartphone eventually begins to slow down - and the reason for this is not only the "aging" of iron, but also software errors, unsuccessful updates or even physical damage.

In this article, we will look at all possible causes of freezes, from overloaded memory to motherboard problems, and give step-by-step instructions for diagnosis and repair. MIUI 12+, If your phone is stuck and doesn't respond to the power button, we have a solution for that.

1. Overloading of RAM (RAM)

Redmi Note 7 supplied 3 or 4 GB RAM -- by standards. 2026 This is a very short year for modern applications, and when memory is full, the system starts to hang when switching between tasks or opening new programs. PUBG Mobile or Genshin Impact, where FPS fall 5-10 The screen is “freezed” for a few seconds.

How to check:

• 📱 Open the Settings. → The phone. → Memory status, and see how much RAM is left. If it's less than 300MB, that's critical.
• 🔍 Run Task Manager (swipe up with retention) and see which apps are "eating" memory.Frequent culprits: Facebook, Instagram, TikTok.
• 🎮 If the lags appear in games, check the graphics settings: high texture settings at 3 GB of RAM are guaranteed to lead to friezes.

Decisions:

• 🧹 Close background applications manually through Task Manager (not 100% helpful, but reduces load).
• 🔄 Enable the Settings option → Special facilities → Remove animations (reduces processor load).
• 📦 Install lightweight versions of applications (Facebook Lite, Messenger Lite).
• 🚀 If the game is lagging, lower the screen resolution in the graphics settings to 720p and turn off the smoothing.

⚠️ Note: Don’t use Google Play memory boosters – they only make the problem worse by triggering additional processes in the background. MIUI It already has a built-in optimizer that works more efficiently.

2. Completed storage (eMMC drive)

Redmi Note 7 equipped with built-in eMMC memory 5.1 — a slower and less reliable type of storage device compared to UFS, It's used in flagships, and when there's less space left. 10%, Read/write speed drops in 2-3 times, which leads to freezes when installing applications, shooting videos or updating the system.

Critical thresholds:

How to make room:

1. Remove the app cache: Settings → Annexes → Select a program → Warehouse → Clear the cache.
2. Transfer the photo and video to SD-map (if there is a slot) or in Google Photos.
3. Remove unused items APK-files from the Download folder.
4. Turn off automatic media saving from messengers (WhatsApp, Telegram).

⚠️ Warning: If there is too little space after cleaning up, check your phone for viruses (for example, through Malwarebytes.

3. Firmware problems MIUI

Redmi Note 7 officially supports updates MIUI 14 (based on Android 12), but many users experience bugs after updates.Typical symptoms:

• 🐢 System lags when swiping between screens.
• 🔄 Infinite boot after restart.
• 📵 No network or Wi-Fi after the update.
• 🔋 Fast battery discharge (related to background processes) MIUI).

The most "glammy" versions MIUI For the Redmi Note 7:

• MIUI 12.5.3 – Mass complaints about camera hangings.
• MIUI 13.0.4 – Bluetooth problems and GPS.
• MIUI 14.0.2 - Lags when unlocking in the face.

Decisions:

1. Reverse to stable version: Download the archive with firmware (for example, MIUI 12.5.2) from en.miui.com. rename the file to update.zip And put it in the root of the memory. + Power, select Recovery → Install update.zip.
2. Resetting settings: Settings → Additionally. → Recovery and discharge → Resetting settings (save data in advance!).
3. Disable animation: Enable Developer Mode (7 taps by Build Number in About Phone), then in Developer Settings set: Windows Animation = 0.5x Animation of transitions = 0.5x Duration of the animator = 0.5x

4. Processor overheating

The Snapdragon 660 in the Redmi Note 7 is prone to overheating due to poor thermal paste and compact body.At temperatures above 60°C processor begins trottling (forced frequency reduction), which leads to friezes in games and slow operation of the interface.°C.

How to check the temperature:

• 🌡️ Install the app AIDA64 or CPU Monitor.
• 🔥 Run a stress test (for example, 3DMark) And watch the schedule.
• 📊 Temperatures above 70°C - critical, above 80°C - risk of disconnection.

Causes of overheating:

• 🎮 Long-term gaming sessions (especially in Call of Duty Mobile or Free Fire).
• ☀️ Direct sunlight or hot weather.
• 🔌 Charging during games (processor load) + battery).
• 🧊 Clogged charging connector or dust under the cover.

Decisions:

• 🛠️ Remove the back cover (if you can) and clean the dust from the radiator with a brush.
• 🧊 Use a cooling stand or fan when playing.
• 🔋 Do not play while charging – this accelerates battery wear and heats the processor.
• 📵 Turn off mobile data/Wi-Fi, If you don’t use it, the communication modules are also hot.

💡

If your phone overheats and turns off, don't turn it on right away. Let it cool for 10 to 15 minutes, or you risk damaging the motherboard.

5. Battery malfunction

The average battery life of the Redmi Note 7 is 2-3 years, and after 500 charging cycles, the capacity drops by 20 to 30 percent, resulting in:

• ⚡ Sudden shutdowns at 20-30% charge.
• 🐢 Strong lags at low battery levels (processor limits performance).
• 🔥 Overheating and battery bloating (dangerous!).

How to check the status of the battery:

1. Enter the dialer code ##4636##, select Battery Information.
2. Install AccuBattery and see the actual capacity (if less than 3000 mAh – the battery is worn out).
3. Check physically: if the case is swollen or the screen “rise” – urgently change the battery!

Decisions:

• 🔄 If the capacity has dropped to 70%, replace the battery (cost) ~1500–2000 ₽).
• 📉 Calibrate the battery: discharge the phone to 0%, then charge to 100% without interruptions.
• 🔌 Use the original power supply unit (5V/2A) — Cheap charging ruins the battery.

⚠️ Warning: If the battery is swelling, don't try to prick it! It could cause fire.

Hardware malfunctions

If the phone freezes even after resetting and replacing the battery, the problem may lie in the hardware:

Typical faults of Redmi Note 7:

How to diagnose:

• 🔧 Check if there have been any falls or moisture (even if everything looks intact).
• 🔊 Listen to extraneous sounds (squeaking, crackling) – this may indicate a short circuit.
• 🔋 Connect to another charger - if the lags go missing, the problem is in the power supply.

If you suspect a hardware breakdown:

1. Make a data backup through Mi PC Suite (if the phone is still on).
2. Contact the service with the diagnosis (cost) ~500–1000 ₽).
3. If repairs are more than 5000 ₽ — Consider buying a new phone (like the Redmi Note 12).

💡

If the phone is "brickled" (it doesn't turn on, there is no response to buttons) - do not try to disassemble it yourself! In 80% of cases, this leads to an aggravation of the problem. EDL-regime.

7. Conflicts with applications

Some programs may cause freezes due to:

• 🛠️ Incompatibility with MIUI (For example, Fortnite or BlueStacks).
• 🔒 Root rights (a superuser may disrupt system processes).
• 📡 Background activity (messengers, location trackers).

How to find the culprit:

1. Boot in Safe Mode (click Power, then hold Power Down until option appears) This mode only runs system applications.
2. If the lags are missing, it's the third-party software's fault.
3. Check out the app reviews on Google Play – if other users have the same issues, contact the developers.

List of “problem” applications for Redmi Note 7:

• 🎵 Spotify – may be in conflict with MIUI because DRM-defense.
• 🎮 Genshin Impact – requires 4 GB of RAM, 3 GB will lag.
• 📱 Parallel Space – Creates a virtual environment by overloading the processor.
• 🔒 Magisk or SuperSU – the wrong root can kill the system.

8. "Brick" after failed firmware

If you tried flashing Redmi Note 7 via Fastboot or TWRP, and now the phone:

• 🖥️ Not included (black screen).
• 🔄 Hangs on the logo. MI or Fastboot.
• 📵 Not defined by a computer.

So the smartphone has become a brick.

• 📁 Wrong firmware (for example, for Redmi Note 7 Pro instead of Redmi Note 7).
• 🔌 Interrupted firmware process (cable disconnected or battery sat down).
• 🔧 Damaged boot section.

How to restore:

1. Method 1: Firmware through Mi Flash Tool Download the official firmware for Redmi Note 7 (codename lavender). Unpack the archive and install the Mi Flash Tool on your PC. + Power to log in to Fastboot. Connect your phone to your PC and in Mi Flash, select the firmware folder. Press Flash.
2. Method 2: EDL-Mode (if Fastboot doesn't work) Requires a special cable (Deep Flash Cable) or soldering contacts on the board.

If nothing helps:

• 📱 Check if the charging indicator is on when you connect the cable. If not, the problem is the power controller.
• 🔧 Contact the service with equipment for ISP-programming (direct firmware through contacts on the board).

FAQ: Frequent questions