In depth comparison and review of Xiaomi Redmi Note 7 and Samsung Galaxy S21 5G. 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 7 | Samsung Galaxy S21 5G |
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Product Type | Smartphone | Smartphone | |
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Manufacturer Model Number | - | SM-G991U1 | |
Form Factor | Touch | Touch | |
Height | 159.21 mm | 151.7 mm | Xiaomi Redmi Note 7 has greater height than Samsung Galaxy S21 5G. |
Width | 75.21 mm | 71.2 mm | Xiaomi Redmi Note 7 has greater width than Samsung Galaxy S21 5G. |
Depth | 8.1 mm | 7.9 mm | Samsung Galaxy S21 5G is narrower than Xiaomi Redmi Note 7. |
Weight | 186 g | 171 g | Samsung Galaxy S21 5G is lighter than Xiaomi Redmi Note 7. |
Body Colour | Space black | Neptune blue | Phantom grey | Phantom white | |
Protection | - | Dustproof, splashproof, water-resistant | |
Waterproof (Water-resistant) | - | Yes | Samsung Galaxy S21 5G is waterproof. |
IP rating | - | IP68 | |
SAR Value | 1.274 W/kg (body), 0.591 W/kg (head), 2.885 W/kg (limb) | 1.58 W/kg (simultaneous), 1.11 W/kg (wireless router), 1.08 W/kg (body), 0.74 W/kg (head) | |
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, Electronic SIM card (e-SIM) | |
SIM Card Qty | Dual-SIM | Dual-SIM | |
SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
DISPLAY | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Display Type | LCD display | OLED display | |
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Display Technology | - | Infinity-O Dynamic AMOLED 2X | |
Screen Size (Display Size) | 6.3" | 6.2" | Xiaomi Redmi Note 7 has larger screen size than Samsung Galaxy S21 5G. |
Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | Samsung Galaxy S21 5G has better screen resolution than Xiaomi Redmi Note 7. |
Display Format | Full HD+ | Full HD+ | |
Pixel Density | 409 ppi | 421 ppi | Samsung Galaxy S21 5G has better pixel density than Xiaomi Redmi Note 7. |
Aspect Ratio | 19:9 | - | |
Max Brightness | 500 cd/m² | - | |
Colour Depth | - | 16.7 million colours | |
Contrast Ratio | 1500:1 | - | |
HDR | - | Yes | Samsung Galaxy S21 5G has HDR. |
HDR Technology | - | HDR10+ | |
Display Enhancement Technology | Sunlight mode | Eye Comfort Shield | |
Display Refresh Rate | - | 120 Hz | |
Display Features | Night Display, Reading mode, Colour temperature adjustment, Dot Drop display | AOD(Always On Display), Video Wallpaper | |
Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
PROCESSOR | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Processor Type (CPU) | Qualcomm Snapdragon 660 AIE | Qualcomm Snapdragon 888 | |
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Clock Speed | 2.2 GHz | 2.84 GHz | Samsung Galaxy S21 5G has higher clock speed than Xiaomi Redmi Note 7. |
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 S21 5G |
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RAM | LPDDR4X SDRAM - 3 GB | LPDDR5 SDRAM - 8 GB | Samsung Galaxy S21 5G has more RAM than Xiaomi Redmi Note 7. |
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Internal Memory Size (Storage Capacity) | 32 GB | 128 GB | Samsung Galaxy S21 5G has more internal memory than Xiaomi Redmi Note 7. |
User Memory | - | 101.2 GB | |
Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | - |
CAMERA | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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MAIN CAMERA |
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Number of Main Cameras | 2 | 3 | |
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Sensor Resolution | 48 Megapixel | 12 Megapixel | Xiaomi Redmi Note 7 has better camera resolution than Samsung Galaxy S21 5G. |
Sensor Size | - | 1/1.76" | |
Lens Type | - | Wide-angle lens | |
Lens Aperture | F/1.8 | F/1.8 | Both phones have the same camera lens aperture. |
Field of View (FoV) | - | 79 degree(s) | |
Pixel Size | 1.6 μm | 1.8 μm | Samsung Galaxy S21 5G has larger camera pixel size than Xiaomi Redmi Note 7. |
Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21 5G has optical stabilisation. |
Focus Adjustment | Automatic | Automatic | |
Laser Auto Focus | - | Yes | |
Optical Zoom | - | 3x | |
Digital Zoom | - | 30x | |
Self-Timer Delay | - | Yes | |
Special Effects | HDR, low light enhancement | Face retouch, Grid Line | |
HDR Mode | Auto HDR mode | Auto HDR mode | |
Camera Modes | Burst mode, Panorama, AI portrait mode | Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Portrait, Night, Motion Photo, Mountain, Single Take, Pro Video, Portrait video, Director's View | |
Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 7 has face detection. |
Light Source | LED flash | High CRI 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 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 7680 x 4320 (8K) at 24 fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 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 | Playback zoom, Motion photo, blink detection, QR-code scanner, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, Scene Optimiser, Lens smudge, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, Super Speed Dual Pixel AF, Quick Measure, Zoom-In Mic, HEIF image capture, Space Zoom, Take 33MP still photos while playing 8K video, Hybrid Optic Zoom 3x, Super Resolution Zoom up to 30x, Digital zoom up to 12x for video, AR Doodle, HEVC (High Efficiency Video coding) support, Microphone Control (Pro Video only) |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 5 Megapixel | 12 Megapixel | Samsung Galaxy S21 5G has better second camera resolution than Xiaomi Redmi Note 7. |
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Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
Lens Aperture (2nd Camera) | - | F/2.2 | |
Field of View (2nd Camera) | - | 120 degree(s) | |
Pixel Size (2nd Camera) | - | 1.4 μm |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | - | 64 Megapixel | |
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Sensor Size (3rd Camera) | - | 1/1.72" | |
Lens Type (3rd Camera) | - | Telephoto lens | |
Lens Aperture (3rd Camera) | - | F/2.0 | |
Field of View (3rd Camera) | - | 76 degree(s) | |
Pixel Size (3rd Camera) | - | 0.8 μm | |
Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21 5G has optical stabilisation of the third camera. |
FRONT CAMERA |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 13 Megapixel | 10 Megapixel | Xiaomi Redmi Note 7 has better front camera resolution than Samsung Galaxy S21 5G. |
Lens Aperture (Front) | - | F/2.2 | |
Field of View (Front) | - | 80 degree(s) | |
Pixel Size (Front) | - | 1.22 μm | |
Focus Adjustment | - | Automatic | |
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 | Dual Pixel AF |
BATTERY AND CHARGING | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Battery Capacity (Battery Size) | 4000 mAh | 4000 mAh | Both phones have the same battery capacity. |
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Fast Charging Technology | Qualcomm Quick Charge 4.0 | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Power Delivery 3.0 | Both phones have fast charging technology. |
Wireless Charging | - | Yes | Samsung Galaxy S21 5G can be charged wirelessly. |
Wireless Charging Standards | - | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | |
Standby Time | 251 hours | - | |
Talk Time | 1380 minutes | 1800 minutes | Samsung Galaxy S21 5G 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 |
Talk (LTE): up to 1800 min Active online usage (LTE): up to 14 hrs Active online usage (Wi-Fi): up to 15 hrs Playback (wireless video): up to 19 hrs Playback (wireless audio): up to 72 hrs |
CELLULAR | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Technology | WCDMA (UMTS) / GSM | CDMA2000 1X / GSM / WCDMA (UMTS) | |
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Mobile Broadband Generation | 4G | 5G | Samsung Galaxy S21 5G has more advanced generation mobile network. |
Operating System | Android 9.0 Pie | Android 11 | |
User Interface | MIUI 10 | - | |
Intelligent Assistant | - | Bixby | |
Payment Technology | - | Samsung Pay | |
Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, GLONASS, Galileo |
COMMUNICATIONS | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | FDD-LTE, TDD-LTE, 5G NR FR1, 5G NR FR2 | |
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2G Band | 850 GSM, 900 GSM, 1900 GSM, 2100 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X, 1900 CDMA2000 1X | |
3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1700, 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 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 14, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 30, Band 38, Band 39, Band 40, Band 41, Band 46, Band 48, Band 66, Band 71 | |
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 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700 PS, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600 | |
5G NR Band | - | N41, n71, n260, n261 | |
5G NR Frequency | - | TDD TD 2500, FDD 600, TDD 39GHz, TDD 28GHz | |
Wireless Interface | Infrared (IrDA), IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax | |
Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
NFC | - | Yes | Samsung Galaxy S21 5G has NFC reader for mobile payments. |
Messaging Services | SMS, MMS | - |
MEDIA | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Supported Digital Audio Standards | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, AMR-WB, AMR-NB | WAV, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 | |
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Supported Digital Video Standards | MKV, XviD, MPEG-4, H.264, M4V, ASP | MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4 | |
Sound Enhancements | - | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound |
FEATURES | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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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 | |
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Sensors | Accelerometer, ambient light sensor, digital compass, gyro sensor, distance sensor, vibration sensor | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | |
Security Devices | Fingerprint reader | Fingerprint reader (under display), face recognition | |
Additional Phone Features | Infrared remote control, Dual microphones | MIMO technology, Screen Write, notification flashlight, Smart Select, Fast Charging, Samsung KNOX, Smart View, Live message, Screen off memo, Samsung DeX support, Bixby Vision, TalkBack, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, Bixby key, Bluetooth Scalable Codec, Samsung Knox Vault, Private Share function, Enhanced Game Booster, Air Command |
OTHERS | Xiaomi Redmi Note 7 | Samsung Galaxy S21 5G |
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Included Accessories | USB cable, power adapter, SIM card removal tool, transparent soft case | SIM card removal tool, USB-C to USB-C cable | |
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Compliant Standards | - | VDE, IP68, HAC (Hearing Aid Compatible), SGS Eye Care Display Certification | |
Max Depth of Water Resistance | - | 1.5 m |