Xiaomi 9: all models of the series and their key features

Xiaomi 9 series became one of the most popular smartphone lineups of the brand released in 2019. Despite the fact that since its debut it has been several years, these devices are still in demand in the secondary market due to balanced characteristics, high-quality screens and powerful hardware. In this article, we will analyze all the models of the Xiaomi 9 series, their technical features, as well as the relevance in 2026 – whether to buy them today or better pay attention to newer devices.

It is important to understand that under the brand Mi 9 hides not one, but several smartphones with different prefixes: the standard version, SE-The Pro-modification and even the Mi 9T (known outside of China as Redmi K20). Each of them is targeted at a different audience, from budget users to flagship enthusiasts, and to avoid getting confused by the diversity, we structured the information by model, identified the key differences, and added a comparison table.

If you’re planning to buy a smartphone from this used-production series or just interested in Xiaomi’s history, this guide will help you understand all the nuances. For those who already own one of the models, we have prepared tips for optimizing the device in 2026, from updating the firmware to replacing the battery.

1. Xiaomi Mi 9 – flagship with triple camera and Snapdragon 855

Standard model Xiaomi Mi 9 It was the first smartphone of the brand with a Qualcomm Snapdragon processor 855, And that was the top solution for Android devices when it came out. 6,39-inch AMOLED-resolution-screen 2340×1080, support HDR10 And it had a built-in fingerprint scanner, and one of the big things that I've seen is the triple main camera:

• 📸 Core module: Sony IMX586, 48 MP, aperture f/1.75, optical stabilization
• 🔍 Telephoto: 12 MPP, 2x phosphoric zoom, aperture f/2.2
• 🌃 Wide-angle: 16 MP, angle of view 117°, aperture f/2.2

Other features include Qi’s 20W wireless charging (a rarity for Xiaomi in those years), stereo speakers and Game Turbo support for gamers, but the model also had drawbacks: no 3.5mm headphone jack, mediocre autonomy (a 3300mAh battery), and problems with overheating under intense loads.

⚠️ Note: Mi 9 owners often experience battery wear after 3-4 years of operation. If the capacity has fallen below 70%, we recommend replacing the battery - this will prolong the life of the device for another 2-3 years.

In 2026, the Mi 9 can be seen as a budget flagship for low-end tasks: web surfing, social networks, photography in good light. For modern games like Genshin Impact or Call of Duty Mobile, the processor power is already not enough - expect slowdowns at high settings.

2. Xiaomi Mi 9 SE — compact flagship AMOLED-screen

Xiaomi Mi 9 SE It was positioned as a "compact flagship" - a rare form factor for 2019, when most manufacturers were chasing large screens.The device received a 5.97-inch AMOLED-display (as opposed to the IPS Competitors like the iPhone SE 2020), Snapdragon 712 processor and triple camera:

• 📸 Core module: Sony IMX586, 48 MP, aperture f/1.75 (similarly)
• 🔍 Telephoto: 8 MPP, 2x zoom f/2.4
• 🌃 Wide-angle: 13 MP, angle of view 117°, aperture f/2.4

The main advantages of the model:

• ✅ Compact housing (147,5 × 70,5 × 7,45 mm) - comfortable in one hand
• ✅ AMOLED-The screen supports Always-On Display
• ✅ Stereo speakers and 3.5mm connector (unlike the Mi 9)

Cons: weak autonomy (a battery of 3070 mAh), no wireless charging and a weaker processor compared to the Mi 9. In 2026, the Mi 9 SE will suit those who are looking for a compact smartphone with a good screen for everyday tasks.

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If you are buying a Mi 9 SE used, check the screen for burn-in pixels – this is a common problem of AMOLED-matrixes after 3-4 years of use.

3. Xiaomi Mi 9 Pro 5G — first 5G-smartphone

The Xiaomi Mi 9 Pro 5G was the company’s first device to support fifth-generation networks, and otherwise it was an improved Mi 9 with a Snapdragon 855+ processor, a more capacious battery (4000 mAh) and a fast 40W charge (full charge in 45 minutes), the design was virtually unchanged, except for the new color “Titanium Black”.

The main differences from the regular Mi 9:

In 2026, the Mi 9 Pro 5G It is especially useful as a collector’s device – support 5G It is implemented on the early module Qualcomm X50, which does not support modern ranges (for example, n78 or n79 In fact, in most regions, the smartphone works in the United States. 4G-It consumes more energy than a regular Mi 9.

⚠️ Note: When buying the Mi 9 Pro 5G check the support 5G In Russia and CIS, the device often only works 4G Due to the lack of compatible frequencies.

4. Xiaomi Mi 9T and Mi 9T Pro – Retractable camera and frameless design

Xiaomi Mi models 9T mi 9T Pro (known in China as Redmi) K20 redmi K20 Pros have become one of the brand’s most successful smartphones thanks to a retractable front camera that made the screen completely frameless. AMOLED-display with built-in fingerprint scanner, but differed in the “stuffing»:

• 📱 Mi 9T: Snapdragon processor 730, triple-camera (48 + 8 + 13 MP), battery 4000 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
• 📱 Mi 9T Pro: Snapdragon processor 855, triple-camera (48 + 8 + 13 MP), battery 4000 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

The main advantages of the Mi 9T series:

• 🔝 Fully frameless screen without "bangs" or cutout
• 🎮 Powerful processor in the Pro version (similar to Mi 9)
• 🔋 Good autonomy thanks to a battery of 4000 mAh
• 🎧 3.5mm connector and stereo speakers

The drawbacks include a retractable camera mechanism that can eventually fail (especially when dust hits). In 2026, the Mi 9T Pro remains one of the best options for buying used among Xiaomi 2019 devices if you want a smartphone with a modern design and good performance.

5. Comparison of all Xiaomi 9 models: which one to choose in 2026?

To make the choice easier, we have summarized the key characteristics of all devices in the series in one table:

In 2026, the best choice among all Xiaomi 9 models is the Mi 9T Pro, which combines a flagship processor, a bezel-less screen and good autonomy. If you want a compact smartphone, look at the Mi 9 SE, but be prepared for a weak battery. The standard Mi 9 and Mi 9 Pro 5G lose in price/quality ratio.

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When buying used, pay attention to the state of the battery and the mechanism of the retractable camera (for the Mi 9T), these elements most often fail after 3-4 years.

6.Actual prices for Xiaomi 9 in 2026

The cost of Xiaomi 9 smartphones in the secondary market depends on the model, condition and configuration. Below are the average prices according to Avito, Yula and Facebook Marketplace (as of June 2026):

• 💰 Mi 9: 8 000 – 12 000 ₽ (depending on the state of the battery)
• 💰 Mi 9 SE: 6 000 – 9 000 ₽ (rarely found in perfect condition)
• 💰 Mi 9 Pro 5G: 10 000 – 15 000 ₽ (collectible)
• 💰 Mi 9T: 9 000 – 13 000 ₽
• 💰 Mi 9T Pro: 12 000 – 18 000 ₽ (most sought-after)

When buying, pay attention to:

Battery condition (capacity must be at least 80% of the original)

All cameras and fingerprint scanners

The absence of “burnt out” pixels on AMOLED-screen

Original charging (especially for the Mi 9 Pro 5G with 40W)

State of the retractable chamber mechanism (for Mi) 9T/9T Pro)-->

If budget allows, consider newer models like the Xiaomi 11 Lite NE 5G (2021) or the POCO F4 (2022) that offer better performance and support for modern communication standards.

7. Frequent Xiaomi 9 Issues and How to Solve Them

Despite the reliability, the Xiaomi 9 series of smartphones after 4-5 years of operation can face typical problems.

• 🔋 Fast battery discharge: Replace the battery (cost) ~1 500 ₽) and calibrate it through Settings. → Battery. → Optimization.
• 📱 Overheating: Clean the case of dust, replace the thermal paste (in the service) and turn off the background activity of applications.
• 📸 Camera problems: Update firmware to the latest version MIUI Or install custom firmware (for example, LineageOS).
• 🔊 Speaker not working: Check the Type-C connector for oxidation (a common problem after moisture is ingested).

For the Mi 9T/9T Pro, the problem with the retractable camera is relevant:

⚠️ Warning: If the camera doesn't move, don't try to open the case yourself! The mechanism is sensitive to dust and mechanical damage. Contact the service - repairs will cost 2,000 to 4,000 ₽.

It is important for Mi 9 Pro 5G owners to keep an eye on firmware updates – some versions of MIUI may conflict with the 5G module, causing communication problems.

FAQ: Answers to Frequent Questions About Xiaomi 9