Detailed comparison and review of Xiaomi Redmi 3S and Xiaomi Redmi 9. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
| DESIGN AND DIMENSIONS | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 139.3 mm | 163.32 mm | Xiaomi Redmi 9 has greater height than Xiaomi Redmi 3S. |
| Width | 69.6 mm | 77.01 mm | Xiaomi Redmi 9 has greater width than Xiaomi Redmi 3S. |
| Depth | 8.5 mm | 9.1 mm | Xiaomi Redmi 3S is narrower than Xiaomi Redmi 3S. |
| Weight | 144 g | 198 g | Xiaomi Redmi 3S is lighter than Xiaomi Redmi 3S. |
| Body Colour | Gold | Carbon grey | |
| Body Material | Metal | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.43 W/kg (body), 0.62 W/kg (head) | 1.065 W/kg (body), 0.789 W/kg (head), 2.309 W/kg (limb) | |
| Integrated Components | - | Ultra-linear speaker | |
| Connector Type | Micro-USB - 5 pin Micro-USB Type B | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Micro SIM, nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Micro SIM + nano SIM/microSD | - |
| DISPLAY | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Screen Size (Display Size) | 5" | 6.53" | Xiaomi Redmi 9 has larger screen size than Xiaomi Redmi 3S. |
|---|---|---|---|
| Screen Resolution (Display Resolution) | 1280 x 720 pixels | 2340 x 1080 pixels | Xiaomi Redmi 9 has better screen resolution than Xiaomi Redmi 3S. |
| Display Format | HD | Full HD+ | |
| Pixel Density | - | 394 ppi | |
| Aspect Ratio | - | 19.5:9 | |
| Max Brightness | - | 400 cd/m² | |
| Contrast Ratio | - | 1500:1 | |
| Display Enhancement Technology | - | Sunlight mode | |
| Display Features | - | Colour temperature adjustment, Dot Drop display, Reading mode 2.0 | |
| Display Protection (Screen Protector) | - | Corning Gorilla Glass 3 (scratch resistant glass) |
| PROCESSOR | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 430 | MediaTek Helio G80 | |
|---|---|---|---|
| Clock Speed | 1.4 GHz | 2 GHz | Xiaomi Redmi 9 has higher clock speed than Xiaomi Redmi 3S. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | Yes | Both phones have 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 505 | Mali-G52 MC2 |
| MEMORY | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| RAM | 2 GB | LPDDR4X SDRAM - 4 GB | Xiaomi Redmi 9 has more RAM than Xiaomi Redmi 3S. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 16 GB | 64 GB | Xiaomi Redmi 9 has more internal memory than Xiaomi Redmi 3S. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSD |
| CAMERA | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 4 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 13 Megapixel | Both phones have the same camera resolution. |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/2.0 | F/2.2 | Xiaomi Redmi 3S has better lens aperture than Xiaomi Redmi 3S. |
| Lens Construction | 5-element | - | |
| Field of View (FoV) | - | 75.2 degree(s) | |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | HDR | HDR, Kaleidoscope | |
| Camera Modes | Panorama, manual mode | Portrait mode | |
| Light Source | LED light | Flash | |
| Video Resolutions | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF) | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 8 Megapixel | |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Field of View (2nd Camera) | - | 118 degree(s) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 5 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Camera Functions (3rd Camera) | - | Macro camera |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Camera Functions (4th Camera) | - | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 8 Megapixel | Xiaomi Redmi 9 has better front camera resolution than Xiaomi Redmi 3S. |
| Lens Aperture (Front) | F/2.2 | F/2.0 | Xiaomi Redmi 9 has better front lens aperture than Xiaomi Redmi 3S. |
| Field of View (Front) | - | 77.8 degree(s) | |
| Focus Adjustment | - | Focus free | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | Beautify Selfie mode | Portrait mode | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi 3S has face detection. |
| Light Source (Front) | - | Display flash | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) | - | |
| Camera Features (Front) | - | Self-timer, Palm shutter |
| BATTERY AND CHARGING | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Battery Capacity (Battery Size) | 4100 mAh | 5020 mAh | Xiaomi Redmi 9 has larger battery capacity than Xiaomi Redmi 3S. |
|---|---|---|---|
| Talk Time | - | 1860 minutes | |
| Run Time Details | - | Talk: up to 1860 min Continuous navigation: up to 19 hrs Playback (video): up to 19 hrs Playback (Music): up to 185 hrs |
| CELLULAR | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| User Interface | MIUI V7 | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 900 GSM, 1900 GSM | - | |
| 3G UMTS Band | - | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 3, Band 5, Band 40 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 4G LTE Frequency | FDD 1800+, FDD 850, TDD 2300 | 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, TDD 2500 | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 4.1 | Bluetooth 5.0 | |
| Bluetooth Profiles | HID | - | |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Supported Digital Audio Standards | AAC, PCM, MP3, FLAC, AC-3, AAC +, eAAC+, MIDI | AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), AMR-WB, AMR-NB | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, VC-1, XviD, MPEG-4, ASF, DivX, MPEG-2, H.264, H.263, M4V, VP8, Sorenson Spark | MKV, H.264, ASP, MP4 |
| FEATURES | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Ambient light sensor, proximity sensor, digital compass, gyro sensor, gravity sensor | Accelerometer, ambient light sensor, digital compass, distance sensor, infrared (IR) sensor | |
| Security Devices | - | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, Reading mode | Fast Charging, AI face unlock |
| OTHERS | Xiaomi Redmi 3S | Xiaomi Redmi 9 |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool | SIM card removal tool, USB-C cable, TPU case, 10W charger |
|---|
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