Redmi Note 9 still remains one of the most talked about budget smartphones on the market, despite the release of new models. Since its release in 2020, it has managed to win the love of millions of users thanks to its balanced characteristics, long battery life and affordable price. But is this device really that good after three years of active use? In this article we have collected real owner reviews, analyzed typical problems and compared Redmi Note 9 with modern analogues.

If you're considering buying a used model or wondering whether to upgrade from this version, you'll find honest answers here. We will not hide the shortcomings: from slow charging to the peculiarities of the camera’s operation in the dark. Let’s also figure out what 2026 alternatives can offer the best price/quality ratio.

Specifications Redmi Note 9: what's under the hood?

The smartphone is equipped with a processor MediaTek Helio G85 - a chipset that at the time of its release was considered one of the best in the budget segment. It is built using a 12nm process technology and has 8 cores with a clock speed of up to 2.0 GHz. This is enough for most everyday tasks, but difficulties arise with modern games at maximum settings.

RAM in the basic version is 3 GB, but there are modifications with 4 GB and 6 GB. Built-in memory can be 64 GB or 128 GB, plus supported microSD up to 512 GB. Screen Redmi Note 9 — IPS LCD with a diagonal of 6.53 inches and a resolution 2340×1080 (Full HD+). The refresh rate is standard - 60 Hz, which looks modest by modern standards.

  • 🔋 Battery: 5020 mAh (one of the most capacious in its class)
  • 📸 Main camera: 48 MP (f/1.8) + 8 MP (ultra-wide) + 2 MP (macro) + 2 MP (depth sensor)
  • 📱 OS: Android 10 with MIUI 11 shell (updated to MIUI 12.5)
  • 🔌 Charging: 18 W (Quick Charge 3.0), but the included adapter is 10 W

One of the key advantages is NFC support in global version (It’s not in Chinese). This is important for contactless payments, which almost everyone uses today. It is also worth noting stereo speakers - a rarity for budget smartphones in 2020.

📊 How long have you been using Redmi Note 9?
  • Less than a year
  • 1-2 years
  • 2-3 years
  • More than 3 years
  • Just considering a purchase

Real autonomy: how long does the battery last after 3 years?

The 5020 mAh battery was the main trump card Redmi Note 9 upon release. And today, many owners confirm: even after several years of use, the smartphone can easily withstand one and a half to two days active use. Of course, it all depends on the scenarios:

  • 📱 Social networks and instant messengers: up to 8-10 hours of screen time
  • 🎮 Games (PUBG, Genshin Impact on medium settings): 4-5 hours
  • 📷 Photo/video shooting: up to 6-7 hours with intensive use of the camera
  • 🎧 Music/video: up to 12-14 hours of playback

However, there are nuances. Firstly, battery degradation over 3 years it can reach 15-20%, especially if the smartphone was often charged “in a hurry” or left on charge overnight. Secondly, MIUI Over time, it has become more voracious - background processes consume more energy than before.

⚠️ Attention: If your Redmi Note 9 began to discharge in a few hours, check the battery status through the engineering menu (*#*#4636#*#*) or applications like AccuBattery. If the capacity is below 70% of the original, replacement is recommended.
Usage scenario Opening hours (new) Operating time (after 3 years)
Internet surfing (Wi-Fi) 10-12 hours 7-9 hours
Video (YouTube, 720p) 14-16 hours 10-12 hours
Games (medium settings) 5-6 hours 3-4 hours
Standby mode (single SIM, 4G) 3-4 days 2-3 days
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To extend battery life, avoid completely discharging and charging to 100%. The optimal range is from 20% to 80%.

Camera Redmi Note 9: Should we expect miracles?

The quad camera looks impressive on paper, but in practice it's not so rosy. The main 48 MP module copes well in the daytime: the photos are detailed, with adequate color rendition. However processing algorithms from Xiaomi Sometimes they overdo the noise reduction, which causes fine details to be lost.

The ultra-wide module (8 MP) gives noticeable distortion at the edges, and the macro camera (2 MP) is more for show - its resolution is too low for high-quality photographs. At night the camera sags: without Night Mode Photos are noisy and blurry due to the long shutter speed.

  • 🌞 Pros:
    • Good detail in daylight
    • User-friendly camera interface with quick launch
    • 4K@30fps video (no stabilization though)
  • 🌙 Cons:
    • Poor performance in low light
    • The macro camera is practically useless
    • Autofocus sometimes misses

Video Redmi Note 9 shoots in resolution up to 4K@30fps, but without electronic stabilization the picture turns out shaky. For stable frames it is better to limit 1080p@60fps. The 13 MP front camera can handle selfies in good lighting, but in the dark it is better to use the main module.

How to improve photo quality on Redmi Note 9?

Use GCam (Google Camera) with the correct configs. For example, version BSG GCam with settings for Helio G85 gives more natural colors and better HDR processing. You can download it on the forum 4PDA or XDA Developers.

Productivity and games: will modern applications handle it?

MediaTek Helio G85 in 2020 it was considered a gaming chipset in the budget segment, but today it is clearly inferior even to mid-budget processors like Snapdragon 680 or Dimensity 700. There are no delays in everyday tasks (social networks, instant messengers, videos), but there are problems with multitasking - especially in the version with 3 GB of RAM.

In games the picture is as follows:

  • 🎮 PUBG Mobile: medium settings, 30-40 FPS (lags with a large number of players)
  • 🏎️ Asphalt 9: low settings, 30 FPS (stuttering in racing)
  • 🧙 Genshin Impact: minimum settings, 20-25 FPS (high heat)
  • 💎 Call of Duty: Mobile: medium settings, 40-50 FPS (stable)

The main problem is heat generation. After 20-30 minutes of intense gaming, the case heats up to 45-50°C, and performance drops (throttling). This is typical for most smartphones Helio G85, since the chipset is not the most energy efficient.

⚠️ Attention: If you plan to play on Redmi Note 9, be sure to use a heat sink case or cooling pad. It is also recommended to disable background application activity in settings Battery → Performance Mode.

☑️ Optimization of Redmi Note 9 for games

Done: 0 / 5

Typical problems Redmi Note 9: What breaks most often?

Over three years of operation Redmi Note 9 characteristic “diseases” emerged. Here are the most common complaints from owners:

  1. Problems with Wi-Fi and Bluetooth: periodic connection dropouts, especially on firmware older than MIUI 12. Resetting network settings often helps (Settings → Wi-Fi → Advanced → Reset).
  2. Heating when charging: Due to the weak included adapter (10 W), many people use 18 W chargers, but this accelerates battery wear. Optimally - charging with a power of 10-12 W.
  3. Proximity sensor glitches: During a call, the screen may not turn off, which leads to accidental clicks. Solved by calibrating the sensor (*#*#6484#*#*).
  4. Type-C connector wear: after 1.5-2 years it may begin to “play,” causing charging to be interrupted. Repairs cost 1000-1500 rubles.
  5. MIUI hangs: especially after major updates. Clearing the cache via Recovery helps (Power + Vol Up).

Another common complaint is build quality. The plastic back cover becomes scratched over time, and the glass of the screen is not the most durable (many people develop “cobwebs” even after light falls). But replacing the display is cheaper than on smartphones with AMOLED screens.

💡

Most problems Redmi Note 9 can be solved programmatically: by updating the firmware, resetting the settings, or calibrating the sensors. Physical breakdowns (connector, battery) are cheaper to repair than flagships.

Is it worth buying Redmi Note 9 in 2026?

It all depends on your expectations and budget. If you need inexpensive smartphone for calls, social networks and light games — Redmi Note 9 still a good option, especially used ones for 8,000–12,000 rubles. However, there are nuances:

  • ✅ Pros of purchasing:
    • Long battery life
    • NFC for contactless payments
    • Good screen for its class
    • Rich ecosystem of accessories
  • ❌ Cons:
    • Outdated processor for modern games
    • No official Android updates
    • The camera is inferior to new state employees
    • Slow charging compared to competitors

If it's important to you performance, up-to-date software or high-quality shooting, it is better to look at newer models:

Model Advantages over Note 9 Price (2026)
Redmi Note 12 AMOLED 120Hz, Snapdragon 4 Gen 1, 33W fast charging 15 000–18 000 ₽
Poco X5 Snapdragon 695, 120 Hz, best camera 16 000–19 000 ₽
Samsung Galaxy A14 90Hz, 4 generations of Android updates, IP67 waterproof 14 000–17 000 ₽

If the budget is limited and Redmi Note 9 bought as a temporary solution - take it, but keep in mind that in a year or two you may need to replace it.

FAQ: answers to frequently asked questions about Redmi Note 9

Is it possible to install custom firmware on Redmi Note 9?

Yes, but with reservations. On the forums 4PDA And XDA there are ports LineageOS, Pixel Experience and other firmwares. However, to do this you need to unlock the bootloader (fastboot oem unlock), which resets all data. There is also a risk of losing data encryption (you will not be able to use banking applications).

How to check the originality of Redmi Note 9 when buying a used one?

1. Check IMEI via *#06# on the website imei.info - the model must match M2003J15SS (global version).

2. Go to Settings → About phone and make sure that the MIUI version matches the official one (for example, MIUI Global 12.5.4).

3. Check the battery status via AccuBattery — the capacity must be at least 80% of the original (4000+ mAh).

4. Inspect the case for signs of tampering (especially around the camera and Type-C connector).

Why is Redmi Note 9 charging slowly?

There are several reasons:

  • The supplied 10 W adapter is used - replace it with 18 W (for example, from Redmi Note 10).
  • The Type-C cable or connector is worn out - try a different cable.
  • Battery saving mode is enabled (Settings → Battery → Battery Mode).
  • Background processes load the processor - close all applications before charging.

How to transfer data from old phone to Redmi Note 9?

The easiest way is to use Mi Mover (built-in application Xiaomi):

  1. On your old phone, turn on Settings → For Developers → USB Debugging.
  2. Connect both phones via OTG cable (need adapter Type-C → Micro-USB, if the old phone has a different connector).
  3. Run Mi Mover on Redmi Note 9 and follow the instructions.
  4. Select the data to transfer (contacts, photos, messages) and wait for completion.

An alternative is cloud services (Google Drive, Mi Cloud) or manual copying via a computer.

Is it possible to play Genshin Impact on Redmi Note 9?

Technically yes, but with caveats:

  • We'll have to post minimum graphics settings (30 FPS, low resolution).
  • The game will be get too hot - It is recommended to use a cooling pad.
  • Autonomy will drop to 2-3 hours of playing time.
  • In battles with a large number of effects, friezes.

For a comfortable game, it is better to consider smartphones with Snapdragon 7xx or Dimensity 8xx/9xx.