Redmi 9 Pro: How much hertz does the screen actually have? debunking the myths of 90Hz

If you’re considering the Xiaomi Redmi 9 Pro as a potential purchase or already own it, you’re probably worried about how often the screen is updated. There’s a lot of conflicting information on the Internet, with some people saying that the 60Hz model has hidden 90Hz that can be activated through an engineering menu. Let’s get a sense of what’s true and what’s the marketing tricks.

Let's get the maps straight away: Redmi 9 Pro (model number M2007J3SC) has a fixed 60Hz refresh rate screen, and it's hard to change that hardware, but there's so much rumor going on around this topic that it's worth looking at the specifications, comparing with the competition, and understanding why 60Hz isn't always a bad thing, and in this article, you'll find not only validated data, but also practical tips for optimizing the display.

Redmi 9 Pro screen specs: what Xiaomi says

According to the official website of Xiaomi, Redmi 9 Pro completes IPS-diagonal 6.67" permit 2400×1080 (Full HD+). The "Display" section is clearly stated:

• 🔹 Update frequency: 60 Hz
• 🔹 Brightness: up to 450 nits (typical)
• 🔹 Contrast: 1500:1
• 🔹 Support HDR: HDR10

Importantly, Xiaomi has never claimed 90Hz support for this model - unlike the Redmi Note 9 Pro (Indian version) or the POCO X3 NFC, where 120Hz was the key selling argument.Moreover, MIUI firmware for the Redmi 9 Pro lacks drivers for dynamic frequency change, which indirectly confirms the hardware limitation.

💡

To check the screen frequency yourself, download the Display Tester app from Google Play, which will show the actual refresh rate, not the one stated in the settings.

Why users believe in 90 Hz: debriefing myths

The source of confusion lies in several factors:

1. Store specification errors: Some online marketplaces (such as AliExpress or local retailers) use 90Hz to make a product more attractive, a typical marketing error that has no technical justification.
2. The Redmi 9 Pro is often confused with the Redmi Note 9 Pro (model number Joyeuse), which did have 90Hz modifications in some regions (e.g. India).
3. Engineering menus. The instructions for activating the hidden 90 Hz are going through the code ##4636## or MTK Engineering Mode. In fact, these manipulations only change the software settings of the display, not the hardware frequency.

To clear up the doubts, we'll turn to the oscilloscope tests, and the XDA Developers forum enthusiasts took measurements and confirmed that even when forced 90 Hz is through ADB, the screen is physically unable to update faster than 60 times per second. The best you can do is increase the frequency of the sensor (touch sampling rate), but it does not affect the picture.

Comparison with competitors: 60 Hz vs 90 Hz in practice

To understand how critical the refresh rate is, compare the Redmi 9 Pro with other budget smartphones from 2020-2021:

As you can see from the table, 60Hz was the standard for the budget segment in 2020. Even flagship models (like the iPhone 11) didn't offer anything beyond that. The difference between 60 and 90Hz is noticeable:

• 🎮 In games: smoother animation with high FPS (for example, PUBG Mobile or Call of Duty).
• 📱 When scrolling: fewer "break" transitions in social networks or browser.
• 🔄 In the interface: faster to respond swipes and gestures.

However, for most everyday tasks (watching videos, messengers, photos), 60 Hz is enough, IPS-Redmi 9 Pro screen has good color reproduction (96% NTSC) high brightness, which compensates for the lack of high frequency.

💡

90 Hz is only suitable for gamers and fans of smooth interface. For multimedia and social networks, 60 Hz is enough with a margin.

How to check the real screen frequency on Redmi 9 Pro

If you’re still in doubt, here are 3 reliable ways to know the exact refresh rate:

1. Download it from Google Play. Run the Refresh Rate. Compare it to your 60Hz claim.
2. ADB. adb shell dumpsys display In the conclusion, find the refresh rate bar - there will be the actual value.
3. Video test. Search YouTube for a video with a frequency test (e.g., "60Hz vs 90Hz Test"). If you see a ripped picture on the screen, your 60Hz display.

⚠️ Warning: Some of the “performance optimizers” on Google Play promise to overclock the screen to 90Hz. These apps are either useless or harmful – they can break the display driver or cause image artifacts. Xiaomi does not provide official tools for changing the frequency on this model.

Can the frequency be increased to 90 Hz?

Technically, no, but there are instructions on the web that supposedly circumvent the restriction.

1. Change via the engineering menu (#36446337##) This code opens MTK Engineering Mode, where in Hardware Testing → You can try to change the parameters of Display, but you can: 🔧 Redmi 9 Pro has this section blocked for editing. 🔧 Even if you can change the value, the screen doesn’t physically support 90Hz.
2. Some custom firmware (like the Pixel Experience) promises to overclock the screen: 🛠️ Requires unlocking the bootloader, which resets the phone and deprives of warranty. 🛠️ In practice, this leads to screen flickering or overheating.

⚠️ Note: Pattempts to forcibly overclock the display can lead to permanent damage to the matrix.In the service centers of Xiaomi, such cases are not considered warranty and the repair will cost ~70% of the cost of the phone.

How to improve interface smoothness at 60 Hz

Although the screen frequency is fixed, you can optimize the system for more comfortable use:

• 🚀 Enable the option to "Speed up animation": Go to Settings → About the phone. Press 7 times on the version. MIUI, To activate Developer Mode. Go back to Settings. → Additionally. → For developers, set the window animation scale, the transition animation scale, and the animator duration scale on the 0.5x.

Turn off unnecessary visual effects:

In the same settings for developers, deactivate Transition Animation and Transition Scale.

Use the light launchers:

Replace the standard MIUI Launcher with a Nova Launcher or Lawnchair – they consume fewer resources and provide smoother scrolling.

These measures will not replace 90 Hz, but will make the interface subjectively faster, and we recommend turning off autobrightness and setting a fixed value, which will reduce the load on the processor when adjusting the backlight.

Redmi 9 Pro alternatives with high screen frequency

If 60Hz is not enough for you, consider these models from Xiaomi with support for 90/120Hz:

All of these smartphones not only offer a high refresh rate, but also have more powerful processors, which is important for gaming and multitasking. If your budget is limited, pay attention to used devices. POCO X3 NFC — You can find him behind ~12 000–15 000 ₽ hands-free guarantee.

FAQ: Frequent questions about Redmi screen frequency 9 Pro