Side by side comparison and review of Xiaomi Redmi Note 7 and Samsung Galaxy A21s. Compare sizes, cameras, batteries, memory capacities and other key specifications and features to simplify the choice of your perfect phone. Our goal is to make it easier for you to decide on the phone that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-A217F/DSN | |
| Form Factor | Touch | Touch | |
| Height | 159.21 mm | 163.7 mm | Samsung Galaxy A21s has greater height than Xiaomi Redmi Note 7. |
| Width | 75.21 mm | 75.3 mm | Samsung Galaxy A21s has greater width than Xiaomi Redmi Note 7. |
| Depth | 8.1 mm | 8.9 mm | Xiaomi Redmi Note 7 is narrower than Xiaomi Redmi Note 7. |
| Weight | 186 g | 192 g | Xiaomi Redmi Note 7 is lighter than Xiaomi Redmi Note 7. |
| Body Colour | Space black | Neptune blue | White | Blue | Black | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.274 W/kg (body), 0.591 W/kg (head), 2.885 W/kg (limb) | 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| 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 7 | Samsung Galaxy A21s |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | - | PLS TFT | |
| Screen Size (Display Size) | 6.3" | 6.5" | Samsung Galaxy A21s has larger screen size than Xiaomi Redmi Note 7. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | Xiaomi Redmi Note 7 has better screen resolution than Samsung Galaxy A21s. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 409 ppi | - | |
| Aspect Ratio | 19:9 | 20:9 | |
| Max Brightness | 500 cd/m² | - | |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | 1500:1 | - | |
| Display Enhancement Technology | Sunlight mode | - | |
| Display Features | Night Display, Reading mode, Colour temperature adjustment, Dot Drop display | Infinity O display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
| PROCESSOR | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 660 AIE | - | |
|---|---|---|---|
| Clock Speed | 2.2 GHz | 2 GHz | Xiaomi Redmi Note 7 has higher clock speed than Samsung Galaxy A21s. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi Redmi Note 7 has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 512 | - |
| MEMORY | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| RAM | LPDDR4X SDRAM - 3 GB | 3 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 32 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 19.5 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSDHC, microSDXC - up to 512 GB |
| CAMERA | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 48 Megapixel | Both phones have the same camera resolution. |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.8 | F/2.0 | Xiaomi Redmi Note 7 has better lens aperture than Xiaomi Redmi Note 7. |
| Field of View (FoV) | - | 80 degree(s) | |
| Pixel Size | 1.6 μm | - | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 8x | |
| Special Effects | HDR, low light enhancement | - | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Burst mode, Panorama, AI portrait mode | Live Focus mode | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 7 has face detection. |
| Light Source | LED flash | LED flash | |
| 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 120 fps | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), EIS video stabilisation, AI Dual camera, 4-in-1 Super Pixel, AI scene detection, 27 different scenes, AI portrait mode with background blurring | Live Focus |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 5 Megapixel | 8 Megapixel | Samsung Galaxy A21s has better second camera resolution than Xiaomi Redmi Note 7. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Field of View (2nd Camera) | - | 123 degree(s) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | 4cm macro photography |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Camera Functions (4th Camera) | - | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 13 Megapixel | 13 Megapixel | Both phones have the same front camera resolution. |
| Lens Aperture (Front) | - | F/2.2 | |
| Focus Adjustment | - | Focus free | |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | AI portrait mode, AI Beautify | - | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 7 has face detection. |
| Camera Features (Front) | Self-timer, AI background bluring, AI scene detection, 12 different scenes | - |
| BATTERY AND CHARGING | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Battery Capacity (Battery Size) | 4000 mAh | 5000 mAh | Samsung Galaxy A21s has larger battery capacity than Xiaomi Redmi Note 7. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0 | - | Xiaomi Redmi Note 7 has fast charging technology. |
| Standby Time | 251 hours | - | |
| Talk Time | 1380 minutes | 3240 minutes | Samsung Galaxy A21s has longer battery life when making calls than Xiaomi Redmi Note 7. |
| Run Time Details | Talk: up to 1380 min Standby: up to 251 hrs Playback (video): up to 13 hrs Gaming: up to 7 hrs |
Active online usage (4G): up to 23 hrs Active online usage (Wi-Fi): up to 23 hrs Playback (video): up to 21 hrs Playback (audio): up to 109 hrs Talk (4G): up to 3240 min |
|
| Battery Technology | - | Lithium Ion |
| CELLULAR | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 9.0 Pie | - | |
| User Interface | MIUI 10 | One UI | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 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 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 38, Band 40 | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2600, TDD 2300 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | Infrared (IrDA), IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 LE | |
| NFC | - | Yes | Samsung Galaxy A21s has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Supported Digital Audio Standards | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, AMR-WB, AMR-NB | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, XviD, MPEG-4, H.264, M4V, ASP | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | - | Dolby Atmos sound technology |
| FEATURES | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| 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 | Accelerometer, ambient light sensor, digital compass, gyro sensor, distance sensor, vibration sensor | Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor | |
| Security Devices | Fingerprint reader | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, Dual microphones | Samsung KNOX, Virtual Light Sensing |
| OTHERS | Xiaomi Redmi Note 7 | Samsung Galaxy A21s |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool, transparent soft case | Power adapter |
|---|
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