Detailed comparison and review of Samsung Galaxy A21s and Xiaomi Redmi Note 12. 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 | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-A217F/DSN | - | |
| Form Factor | Touch | Touch | |
| Height | 163.7 mm | 165.66 mm | Xiaomi Redmi Note 12 has greater height than Samsung Galaxy A21s. |
| Width | 75.3 mm | 75.96 mm | Xiaomi Redmi Note 12 has greater width than Samsung Galaxy A21s. |
| Depth | 8.9 mm | 7.85 mm | Xiaomi Redmi Note 12 is narrower than Samsung Galaxy A21s. |
| Weight | 192 g | 183.5 g | Xiaomi Redmi Note 12 is lighter than Samsung Galaxy A21s. |
| Body Colour | White | Blue | Black | Ice blue | Onyx grey | Mint green | |
| Protection | - | Dustproof, splashproof | |
| Waterproof (Water-resistant) | - | - | Xiaomi Redmi Note 12 is waterproof. |
| IP rating | - | IP53 | |
| Repairability Index | - | 7.5 (out of 10) | |
| SAR Value | 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) | 2.55 W/kg (limb), 0.9 W/kg (head), 0.995 W/kg (body) | |
| 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 | - | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | PLS TFT | AMOLED | |
| Screen Size (Display Size) | 6.5" | 6.67" | Xiaomi Redmi Note 12 has larger screen size than Samsung Galaxy A21s. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 2400 x 1080 pixels | Xiaomi Redmi Note 12 has better screen resolution than Samsung Galaxy A21s. |
| Display Format | HD+ | Full HD+ | |
| Pixel Density | - | 395 ppi | |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | - | 1200 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| Contrast Ratio | - | 4500000:1 | |
| Display Refresh Rate | - | 120 Hz | |
| Touch Sampling Rate | - | 240 Hz | |
| Display Features | Infinity O display | Sunlight Display, Reading mode, DCI-P3 Wide colour gamut, DotDisplay, E2 Pro |
| PROCESSOR | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Processor Type (CPU) | - | Qualcomm Snapdragon 685 | |
|---|---|---|---|
| Clock Speed | 2 GHz | 2.8 GHz | Xiaomi Redmi Note 12 has higher clock speed than Samsung Galaxy A21s. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | - | Qualcomm ADRENO 610 |
| MEMORY | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| RAM | 3 GB | LPDDR4X SDRAM - 4 GB | Xiaomi Redmi Note 12 has more RAM than Samsung Galaxy A21s. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 128 GB | Xiaomi Redmi Note 12 has more internal memory than Samsung Galaxy A21s. |
| User Memory | 19.5 GB | - | |
| Memory Interface | - | UFS 2.2 | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 512 GB | microSDHC, microSD, microSDXC - up to 1 TB |
| CAMERA | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 50 Megapixel | Xiaomi Redmi Note 12 has better camera resolution than Samsung Galaxy A21s. |
| Sensor Size | - | 1/2.76" | |
| Sensor Name | - | Samsung ISOCELL JN1 | |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/2.0 | F/1.8 | Xiaomi Redmi Note 12 has better lens aperture than Samsung Galaxy A21s. |
| Lens Construction | - | 5-element | |
| Field of View (FoV) | 80 degree(s) | - | |
| Pixel Size | - | 0.64 μm | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | 8x | - | |
| Special Effects | - | Bokeh effect | |
| Camera Modes | Live Focus mode | Portrait mode | |
| Light Source | LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Functions) | Live Focus | 4-in-1 to 1.28μm pixel |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 8 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/4" | |
| Sensor Name (2nd Camera) | - | Omnivision OV08D 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. |
| Lens Element Qty (2nd Camera) | - | 5-element | |
| Field of View (2nd Camera) | 123 degree(s) | 120 degree(s) | Samsung Galaxy A21s has larger second camera lens field of view than Xiaomi Redmi Note 12. |
| Pixel Size (2nd Camera) | - | 1.12 μm |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 2 Megapixel | Both phones have the same third camera resolution. |
|---|---|---|---|
| Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
| Lens Element Qty (3rd Camera) | - | 3-element | |
| Camera Functions (3rd Camera) | Macro 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. |
| Sensor Size (Front) | - | 1/3.0" | |
| Lens Aperture (Front) | F/2.2 | F/2.45 | Samsung Galaxy A21s has better front lens aperture than Samsung Galaxy A21s. |
| Lens Element Qty (Front) | - | 5-element | |
| Focus Adjustment | Focus free | - | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps |
| BATTERY AND CHARGING | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 5000 mAh | Both phones have the same battery capacity. |
|---|---|---|---|
| Fast Charging Technology | - | Mi-FC fast charging technology | Xiaomi Redmi Note 12 has fast charging technology. |
| Talk Time | 3240 minutes | 1860 minutes | Samsung Galaxy A21s has longer battery life when making calls than Xiaomi Redmi Note 12. |
| Run Time Details | 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 |
Talk: up to 1860 min Gaming: up to 9 hrs Playback (video): up to 21 hrs |
|
| Battery Technology | Lithium Ion | - |
| CELLULAR | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | - | Android 13 | |
| User Interface | One UI | MIUI 14 | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, Galileo |
| COMMUNICATIONS | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 5, Band 8 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 850, 900 | 2100, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | Band 1, 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 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.0 LE | Bluetooth 5.0 | |
| NFC | Yes | - | Samsung Galaxy A21s has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Supported Digital Audio Standards | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | - | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | - | |
| Sound Enhancements | Dolby Atmos sound technology | - |
| FEATURES | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyroscope | |
| Security Devices | Face recognition, fingerprint reader | Face recognition, fingerprint reader (side) | |
| Security Technology | - | AI face unlock | |
| Additional Phone Features | Samsung KNOX, Virtual Light Sensing | Graphite cooling, IR blaster, coin vibration motor |
| OTHERS | Samsung Galaxy A21s | Xiaomi Redmi Note 12 |
|---|
| Included Accessories | Power adapter | 33W charger | |
|---|---|---|---|
| Compliant Standards | - | IP53, SGS Eye Care Display Certification, SGS Seamless Pro 120Hz Certification, Netflix HD Certification |
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