In depth comparison and review of Xiaomi Redmi Note 9S and ASUS Zenfone 8 Flip. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | ZS672KS | |
| Form Factor | Touch | Touch | |
| Height | 165.75 mm | 165.04 mm | Xiaomi Redmi Note 9S has greater height than ASUS Zenfone 8 Flip. |
| Width | 76.68 mm | 77.28 mm | ASUS Zenfone 8 Flip has greater width than Xiaomi Redmi Note 9S. |
| Depth | 8.8 mm | 9.6 mm | Xiaomi Redmi Note 9S is narrower than Xiaomi Redmi Note 9S. |
| Weight | 209 g | 230 g | Xiaomi Redmi Note 9S is lighter than Xiaomi Redmi Note 9S. |
| Body Colour | Aurora blue | Galactic black | |
| Body Material | Curved 3D glass, Gorilla glass 5 | Glass | |
| Protection | Dustproof, splashproof | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.98 W/kg (body), 0.72 W/kg (head), 2.35 W/kg (limb) | 1.43 W/kg (head), 1.245 W/kg (body), 3.504 W/kg (limb) | |
| Integrated Components | Ultra-linear speakers | - | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
| DISPLAY | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | - | AMOLED | |
| Screen Size (Display Size) | 6.67" | 6.67" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 2400 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | Full HD+ | Full HD+ | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 1000 cd/m² | |
| Contrast Ratio | 1500:1 | - | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | - | DC Dimming | |
| Display Refresh Rate | - | 90 Hz | |
| Display Features | Reading mode 2.0, Dot Display | ASUS Glove Touch technology, Delta-E < 1, NanoEdge display, 105% NTSC, 110% DCI-P3 | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | Corning Gorilla Glass 6 (scratch resistant glass) |
| PROCESSOR | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 720G | Qualcomm Snapdragon 888 5G | |
|---|---|---|---|
| Processor Number | - | SM8350 | |
| Clock Speed | 2.3 GHz | 2.84 GHz | ASUS Zenfone 8 Flip has higher clock speed than Xiaomi Redmi Note 9S. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi Redmi Note 9S has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 618 | Qualcomm ADRENO 660 |
| MEMORY | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| RAM | 4 GB | LPDDR5 SDRAM - 8 GB | ASUS Zenfone 8 Flip has more RAM than Xiaomi Redmi Note 9S. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 256 GB | ASUS Zenfone 8 Flip has more internal memory than Xiaomi Redmi Note 9S. |
| Memory Interface | - | UFS 3.1 | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 512 GB | microSDHC, microSD, microSDXC - up to 2 TB |
| CAMERA | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Rear Camera Design | - | Flip | |
| Sensor Resolution | 48 Megapixel | 64 Megapixel | ASUS Zenfone 8 Flip has better camera resolution than Xiaomi Redmi Note 9S. |
| Sensor Size | 1/2" | 1/1.7" | Xiaomi Redmi Note 9S has better camera sensor size than ASUS Zenfone 8 Flip. |
| Sensor Name | - | Sony Exmor RS IMX686 sensor | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.79 | F/1.8 | Xiaomi Redmi Note 9S has better lens aperture than Xiaomi Redmi Note 9S. |
| Lens Construction | 6-element | - | |
| Field of View (FoV) | 79 degree(s) | 78.3 degree(s) | Xiaomi Redmi Note 9S has larger lens field of view than ASUS Zenfone 8 Flip. |
| Pixel Size | 0.8 μm | 0.8 μm | Both phones have the same camera pixel size. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | ASUS Zenfone 8 Flip has optical stabilisation. |
| Focus Adjustment | Automatic | - | |
| Minimum Focal Length (Focal Distance) | - | 26.6 mm | |
| Special Effects | HDR, Kaleidoscope | - | |
| Camera Modes | Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits | Slow motion video, Time-lapse mode, Pro mode, Auto Panorama | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9S has face detection. |
| Light Source | Dual LED flash | LED flash | |
| Still Image Resolutions | 8000 x 6000 | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 960 fps | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 30fps, Slo-mo video 3840 x 2160 (4K) at 120 fps | |
| Camera Features (Functions) | 4-in-1 Super Pixel, AI scene detection, Portrait mode with background blurring, Ultra wide-angle edge distortion correction, Steady handheld night photography, full screen frame, AI watermark | Phase Detect Auto-Focus (PDAF), 3-axis electronic image stabilisation, Wind Noise Filter, Motion tracking, Quad Bayer technology, HyperSteady, Free Zoom, Mic Focus, 2x1 On-Chip Lens (OCL), Quick Flip Angle camera |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 12 Megapixel | ASUS Zenfone 8 Flip has better second camera resolution than Xiaomi Redmi Note 9S. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/2.55" | |
| Sensor Name (2nd Camera) | - | Sony Exmor RS IMX363 sensor | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
| Field of View (2nd Camera) | 119 degree(s) | - | |
| Pixel Size (2nd Camera) | 1.12 μm | 1.4 μm | ASUS Zenfone 8 Flip has larger second camera pixel size than Xiaomi Redmi Note 9S. |
| Minimum Focal Length (2nd Camera) | - | 14.3 mm | |
| Camera Features (2nd Camera) | - | Dual Pixel Phase Detect Auto-Focus (PDAF), Real-time distortion correction, Dual Pixel image sensor, 4cm macro photography |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 5 Megapixel | 8 Megapixel | ASUS Zenfone 8 Flip has higher resolution third camera than Xiaomi Redmi Note 9S. |
|---|---|---|---|
| Sensor Size (3rd Camera) | - | 1/2.55" | |
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.4 | - | |
| Pixel Size (3rd Camera) | 1.12 μm | 1.4 μm | ASUS Zenfone 8 Flip has larger third camera pixel size than Xiaomi Redmi Note 9S. |
| Optical Zoom | - | 3x | |
| Digital Zoom | - | 12x | |
| Camera Functions (3rd Camera) | Macro camera | - | |
| Camera Features (3rd Camera) | AF (2cm-10cm) | Dual Pixel image sensor |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Lens Aperture (4th Camera) | F/2.4 | - | |
| Pixel Size (4th Camera) | 1.75 μm | - | |
| Camera Functions (4th Camera) | Depth camera | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 0 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | - | |
| Lens Aperture (Front) | F/2.48 | - | |
| Pixel Size (Front) | 1 μm | - | |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | Panoramic selfies, AI portrait mode, AI Beautify, Slo-mo Selfie | - | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9S has face detection. |
| Light Source (Front) | Display flash | - | |
| Camera Features (Front) | AI scene detection, Palm shutter, AI silhouette detection | - |
| BATTERY AND CHARGING | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Battery Capacity (Battery Size) | 5020 mAh | 5000 mAh | Xiaomi Redmi Note 9S has larger battery capacity than ASUS Zenfone 8 Flip. |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge 4.0, Power Delivery 3.0 | ASUS Zenfone 8 Flip has fast charging technology. |
| Recharge Time (Charging Time) | - | 1.7 hours | |
| Talk Time | 1980 minutes | - | |
| Run Time Details | Talk: up to 1980 min Gaming: up to 13 hrs Playback (Music): up to 147 hrs Navigation: up to 16 hrs |
- | |
| Battery Technology | Lithium Ion | Lithium polymer |
| CELLULAR | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | ASUS Zenfone 8 Flip has more advanced generation mobile network. |
| Operating System | - | Android 11 | |
| User Interface | MIUI 10 | ASUS ZenUI 8.0 | |
| Payment Technology | Google Pay | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC |
| COMMUNICATIONS | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE, DC-HSPA+, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1900 GSM, 2100 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 6, Band 8, Band 19 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1800, 1700, 850, 800, 900, 800 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 34, Band 38, Band 39, Band 40, Band 41, Band 42 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500 | |
| 5G NR Band | - | N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12 | |
| 5G NR Frequency | - | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax, Wi-Fi 6E | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.2 EDR | |
| Bluetooth Profiles | - | A2DP | |
| NFC | - | Yes | ASUS Zenfone 8 Flip has NFC reader for mobile payments. |
| Modem | - | Snapdragon X60 5G | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio), MP4 | Apt-X, apt-X HD | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, XviD, M4V, MP4 | - | |
| Sound Enhancements | - | Dirac HD Sound, Hi-Res audio certified, OZO Audio, Qualcomm aptX Adaptive | |
| Audio Amplifier | Smart PA | Dual NXP TFA9874 |
| FEATURES | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, digital compass, gyro sensor, distance sensor, infrared (IR) sensor, In-screen ambient light sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, G-sensor, hall sensor, gyroscope | |
| Security Devices | Face recognition, fingerprint reader (side) | Fingerprint reader (under display), face recognition | |
| Security Technology | A.I. face recognition | - | |
| Additional Phone Features | Infrared remote control, AI face unlock, Qualcomm 5th generation AI Engine, Z-axis linear vibration motor | MIMO technology, Power Saving Mode, AudioWizard, Smart Key, One Hand Mode, ASUS Noise Reduction technology, ARCore, dual stereo speakers, triple noise reduction microphones, system mode |
| OTHERS | Xiaomi Redmi Note 9S | ASUS Zenfone 8 Flip |
|---|
| Included Accessories | Protective cover, SIM card removal tool, USB-C cable, 18W charger | SIM card removal tool, USB-C to USB-C cable, protective case, power adapter (30 W) | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | - |
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