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Redmi K90 Ultra
- Chipset: Snapdragon 8 Elite
- Internal Storage: 256GB or 512GB
- Battery: 8,550mAh
- RAM: 12GB or 16GB
PROS
- Active cooling fan with a vapor chamber. The fan is rated at 32dB and has its own IPX8/IPX9 rating.
- Large 8,550mAh battery with 100W wired charging.
- 165Hz display with a 3,500-nit peak.
CONS
- Basic cameras: only a 50MP main and an 8MP ultra-wide, with no telephoto.
- China-only for now, with no confirmed global or India release.
The Redmi K90 Ultra is a gaming-oriented phone from Xiaomi’s Redmi brand, priced just under the flagship tier. It launched in China on June 30, 2026. The screen is a 6.83-inch flat AMOLED at 2772 × 1280 and 165Hz. The chip is the 3nm Snapdragon 8 Elite, with up to 16GB of LPDDR5X RAM and 512GB of UFS 4.1 storage, plus a separate D2 chip for AI upscaling and frame interpolation. The back is glass, the frame is aluminum, it weighs 227g, and there is no microSD slot. The rear cameras are a 50MP main and an 8MP ultra-wide. The chip is last generation’s top-end part, but what makes this phone unusual is the built-in fan. Redmi K phones rarely have one. The Ultra is a cheaper alternative to the K90 Max and keeps that model’s fan and large battery. The fan is 18.1mm, reportedly runs at 32dB, and works with a 6,000mm² vapor chamber.
The battery is 8,550mAh, silicon-carbon, with an energy density of 876Wh/L. Wired charging is 100W and reverse wired charging is 22.5W. None of the sources I found give a typical or usable capacity separate from that figure. The phone is rated IP66, IP68 and IP69, and the fan module has its own IPX8 and IPX9 rating. It runs Android 16 with HyperOS 3.
The 12GB/256GB model starts at CNY 2,999 in China. Converted, that is roughly $415 to $440, depending on who did the math. The 256GB variants had an introductory price of CNY 2,799 (about $420). It is China-only for now, and Xiaomi has not said whether a global or India release is planned. The realistic buyer plays demanding games for long stretches and cares more about battery life and sustained performance than photos. There is no telephoto lens.
Within Redmi’s lineup it sits between two phones. The K90 Max is above it. The K90 Max has a Dimensity 9500, an 8,500mAh battery, a cooling fan and 100W charging, and starts around CNY 3,499. The standard K90 is below it, with a 6.59-inch 2K OLED at 120Hz and a 7,100mAh battery. Outside Redmi, the Realme GT 8 and the iQOO Neo 11 compete for the same buyer. Industry coverage lists the GT 8 as a direct rival to the K90 series. The Neo 11 is the closer match on paper. It has the same Snapdragon 8 Elite, a 7,500mAh battery, 100W wired charging and a 6.82-inch 2K 144Hz AMOLED, and launched at CNY 2,599. The Redmi has about 1,000mAh more battery and the fan. The iQOO has the higher-resolution screen.
Redmi K90 Ultra Images
Full Specifications
Identification
| Phone ID A phone ID typically refers to a unique hardware identifier like an IMEI Number (International Mobile Equipment Identity) that distinguishes your specific physical phone from any other device. | Model number 2604FRK1EC |
| Brand / Model A brand model is a strategic framework that defines how a company builds, positions, and manages its identity to connect with customers and guide business decisions. | Xiaomi Redmi K90 Ultra |
| Variant A variant is something that differs in some way from others of the same kind or from a standard. |
12GB/256GB, 16GB/256GB, 12GB/512GB, 16GB/512GB |
| Release date A release date is the specific day when a product, service, or official piece of information becomes available to the public | June 30, 2026 (China) |
| Price A price is the amount of money or other compensation that a buyer gives to a seller to acquire a product or service | CNY 2,999 for 12GB/256GB, about $415 to $440 |
Smartphone Display
| Size Size means how large or small a person, object, or amount is | 6.83 inches |
| Resolution The measure of sharpness and detail in a digital photo, video, or screen, usually counted in pixels or dots per inch (DPI). | 2772 × 1280 (1.5K) |
| Panel type The panel type of a screen or monitor refers to the specific liquid crystal or diode technology used to display images, which dictates the screen's color accuracy, viewing angles, contrast, and speed. | Flat AMOLED |
| Refresh rate A refresh rate is the number of times per second a screen updates the image it shows. | 165Hz |
| Peak brightness Peak brightness is the highest level of luminance a display screen can achieve for a brief moment in a small area. | 3,500 nits |
Smartphone Performance
| Operating system An operating system (OS) is the main system software that manages a computer's physical hardware and provides a base for other programs to run | Android 16, HyperOS 3 |
| Chipset A chipset is a group of microchips on a computer's motherboard or electronic device that manages the flow of data between the CPU, memory, storage, and peripheral devices. | Snapdragon 8 Elite (3nm), plus a D2 chip for upscaling and frame interpolation |
| RAM RAM stands for Random Access Memory, which is a device's short-term memory used to temporarily store data that the processor needs right now. | 12GB or 16GB LPDDR5X |
| Internal storage Internal storage is the built-in, permanent memory inside a device like a smartphone, tablet, or computer used to hold the operating system, apps, and your personal files. | 256GB or 512GB UFS 4.1, not expandable |
| CPU cores A CPU core is an independent processing unit inside a computer's central processing unit (CPU) that reads and executes program instructions. | Octa-core: 2 × 4.32GHz plus 6 × 3.53GHz Oryon cores |
| GPU A GPU stands for Graphics Processing Unit, which is a specialized electronic chip designed to rapidly render images, video, and 3D graphics. | Adreno 830 |
Camera
| Main camera A main camera (or primary camera) is the principal, highest-quality imaging lens and sensor system on a device—most commonly located on the rear of a smartphone. |
50MP main plus 8MP ultra-wide, with OIS on the main sensor |
| Front camera A front camera is a built-in lens on the same side as a device's screen—such as a smartphone, tablet, or laptop—that points directly at the user. | 20MP |
| Video A video is an electronic recording of moving visual images, usually played with sound on a screen. |
main - Up to 8K at 30fps, 4K at 60fps front - 1080p at 30fps |
Smartphone Battery & Charging
| Battery Capacity Battery capacity is the total amount of electrical energy a battery can store and deliver, functioning much like the size of a fuel tank. | 8,550mAh silicon-carbon |
| Wired charging Wired charging means using a physical cable to connect a device directly to a power source to transfer electricity into its battery. | 100W (plus 22.5W reverse wired) |
| Wireless Charging Wireless charging is a cable-free method that powers electronic devices by transferring energy through electromagnetic fields instead of a physical plug. |
Smartphone Connectivity
| 5G support 5G support means a device or network can connect to the fifth-generation cellular mobile network, delivering much faster download speeds and lower response times than older 4e and 4G LTE systems. | |
| SIM type A SIM (Subscriber Identity Module) type or size refers to the physical dimensions or digital architecture of the smart chip that connects your phone to a mobile network. | Dual nano SIM |
| Wi-Fi version A Wi-Fi version is a specific generation or technical standard of wireless networking technology that determines your device's speed, range, and connection quality. | Wi-Fi 7 |
| Bluetooth version A Bluetooth version is the specific update level of the wireless rules that a device uses to connect and share data | 5.4 |
| NFC NFC stands for Near Field Communication, a short-range wireless technology that lets two electronic devices exchange data when they are placed a few centimeters apart. | |
| USB USB stands for Universal Serial Bus, a global standard connection for passing data, power, and video signals between computers and electronic devices. | USB-C with OTG and tethering |
Build & Design
| Weight Weight is the downward force that gravity exerts on an object. | 227g |
| Dimensions A dimension is a measurement in a specific direction (such as length, width, or height) or a distinct aspect, feature, or scope of a situation. | 162.9 × 77.9 × 8.2mm |
| Water resistance rating A water resistance rating measures how much static water pressure a device or material can withstand before leaking or failing | IP68 and IP69 |
| Dust rating A dust rating is the first number in an Ingress Protection (IP) code that shows how well a device keeps out solid objects and dust. | IP66 and the dust-tight “6” in IP68/IP69 |
| Materials A material is a physical substance or matter used to make objects, build structures, or create products | Glass back, aluminum frame |
| Available colors different color choices that are ready for you to buy or pick for a product. | Shadow Black, Space Silver, Sky Blue |
Extras
| Biometrics Biometrics refer to the measurement and statistical analysis of unique physical and behavioral human characteristics used for identification and verification. | Optical in-screen fingerprint sensor |
| Audio Audio means sound, or the recording, transmission, and reproduction of sound within the range of human hearing. | Earpiece plus multiple speakers |
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