Xiaomi Mi A3 vs Samsung Galaxy M21 vs Xiaomi Redmi Note 8 Specs Comparison
Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.
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| Xiaomi Mi A3 | Samsung Galaxy M21 | Xiaomi Redmi Note 8 |
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Released
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Jul 24, 2019
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Released
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Mar 23, 2020
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Released
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Oct 16, 2019
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6.1-inch · 1560x720px
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6.4-inch · 2340x1080px
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6.3-inch · 2340x1080px
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Triple camera
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Triple camera
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Quad camera
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4GB · 128GB
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4GB · 64GB
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3GB · 32GB
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4030 mAh
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6000 mAh
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4000 mAh
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| Check Accessories | Check Accessories | Check Accessories |
Availability
| Officially announced | ||
|---|---|---|
| Jul 17, 2019 | Mar 18, 2020 | Aug 29, 2019 |
Design
| Dimensions | ||
|---|---|---|
| 6.04 x 2.83 x 0.33 inches 153.48 x 71.85 x 8.475 mm |
6.26 x 2.96 x 0.35 inches 159.0 x 75.1 x 8.9 mm |
6.23 x 2.96 x 0.33 inches 158.3 x 75.3 x 8.35 mm |
| Weight | ||
| 6.13 oz / 173.8 g | 6.63 oz / 188.0 g | 6.70 oz / 190.0 g |
| Materials | ||
| Back: Glass (Corning Gorilla Glass 5) Frame: Plastic | Back: Plastic Frame: Plastic | Back: Glass Frame: Plastic |
| Biometrics | ||
| 2D Face unlock, Optical in-screen fingerprint | 2D Face unlock, Fingerprint (touch) | Fingerprint (touch) |
| Keys | ||
| Back: Volume control, Lock/Unlock key | Right: Volume control, Lock/Unlock key | Right: Volume control, Lock/Unlock key |
| Colors | ||
| Gray, Blue, White | Midnight blue, Raven black | Neptune Blue, Moonlight White, Space Black, Nebula Purple, Cosmic Purple |
Display
| Size | ||
|---|---|---|
| 6.1-inch, 82.56% screen-to-body | 6.4-inch, 84.11% screen-to-body | 6.3-inch, 81.89% screen-to-body |
| Type | ||
| Super AMOLED | Super AMOLED, 420 nits | IPS LCD, 60Hz |
| Resolution | ||
| 1560x720px, 19.5:9 ratio, 282 PPI | 2340x1080px, 19.5:9 ratio, 403 PPI | 2340x1080px, 19.5:9 ratio, 409 PPI |
| Protection | ||
| Corning Gorilla Glass 5 | Corning Gorilla Glass 3 | Corning Gorilla Glass 5 |
| Features | ||
| Scratch-resistant glass, Proximity sensor | ||
Hardware
| System chip | ||
|---|---|---|
| Snapdragon 665 (11 nm) | Exynos 9611 (10 nm) | Snapdragon 665 SM6125 (11 nm) |
| Processor | ||
| Octa-core 2000 MHz Kryo 260 | Octa-core 4x2.3GHz Cortex-A73 4x1.7GHz Cortex-A53 |
Octa-core 2000 MHz Kryo 260 |
| GPU | ||
| Adreno 610 | Mali-G72 MP3 | Adreno 610 |
| Memory | ||
| 4GB (LPDDR4)/128GB 4GB/64GB | 4GB (LPDDR4)/64GB 6GB/128GB |
3GB/32GB (eMMC) 4GB/64GB |
| Storage expansion | ||
| microSDXC up to 256 GB | microSDXC up to 512 GB | microSDXC up to 128 GB |
| OS | ||
| Android (11, 10, 9.0 Pie) | Android (11, 10) | Android (10) |
Battery
| Type | ||
|---|---|---|
| 4030 mAh | 6000 mAh, Li - Polymer | 4000 mAh, Li - Polymer |
| Charging | ||
| Qualcomm Quick Charge 3.0 | Fast charging | |
| Charge speed | ||
| Wired: 18.0W | ||
Camera
| Rear | ||
|---|---|---|
| Triple camera | Triple camera | Quad camera |
| Main camera | ||
| 48 MP (PDAF) Aperture size: F1.8 Sensor size: 1/2.3" Pixel size: 0.8 μm | 48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm | 48 MP (Autofocus) Aperture size: F1.8 Sensor size: 1/2" Pixel size: 0.8 μm |
| Second camera | ||
| 8 MP (Ultra-wide) Aperture size: F2.2 Pixel size: 1.12 μm | 8 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 12 mm Sensor size: 1/4" Pixel size: 1.12 μm | 8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm |
| Third camera | ||
| 2 MP (Depth information) Aperture size: F2.4 |
5 MP (Depth information) Aperture size: F2.2 |
2 MP (Macro, Autofocus) Aperture size: F2.4 Pixel size: 1.75 μm |
| Fourth camera | ||
| 2 MP (Depth information) Aperture size: F2.4 Pixel size: 1.75 μm |
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| Flash | ||
| LED | LED | LED |
| Video recording | ||
| 4K UHD (30 fps), 1080p (120 fps), 720p (240 fps) EIS, Video calling, Video sharing |
4K UHD (30 fps), 1080p, 720p (240 fps) EIS | 4K UHD (30 fps), 1080p (120 fps), 720p (240 fps) |
| Front | ||
| 32 MP Video capture: 1080p (30 fps) | 20 MP (HDR) Video capture: 1080p (30 fps) | 13 MP Video capture: 1080p (30 fps) |
Connectivity & Features
| Bluetooth | ||
|---|---|---|
| 5.0 | 5.0 | 4.2 |
| WLAN | ||
| dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac | dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac | dual-band Wi-Fi Direct, Hotspot 802.11 b, g, n, ac |
| USB | ||
| Type-C | Type-C, USB 2.0 | Type-C, USB 2.0 |
| Sensors | ||
| Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor | Accelerometer, Gyroscope, Proximity sensor | Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor |
| Location | ||
| GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning | GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning | GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning |
| Other | ||
| Infrared, VoIP, Tethering, Computer sync, OTA sync | Infrared | |
Multimedia
| Headphones | ||
|---|---|---|
| 3.5mm jack | 3.5mm jack | 3.5mm jack |
| Speakers | ||
| Earpiece, Loudspeaker | Earpiece, Loudspeaker | Earpiece, Loudspeaker |
| Features | ||
| Album art cover, Background playback | Dolby Atmos | |
| Screen mirroring | ||
| Wireless screen share | Wireless screen share | Wireless screen share |
| Radio | ||
| FM | FM | |
| Additional microphone(s) | ||
| Noise cancellation | Noise cancellation | |
Cellular
| LTE Bands | ||
|---|---|---|
| 1, 2, 3, 4, 5, 7, 8, 20, 28 | 1, 3, 5, 7, 8, 20 | 1, 2, 3, 4, 5, 7, 8, 20 |
| TDD Bands | ||
| 38, 40 | 38, 40, 41 | 38, 40 |
| 3G Bands | ||
| 5, 8, 4, 2, 1 | 1, 2, 5, 8 | 1, 2, 4, 5, 8 |
| Data Speed | ||
| LTE-A Cat 9 (450/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s | LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s | LTE-A, HSPA |
| Dual SIM | ||
| Yes | Yes | No |
| SIM type | ||
| Nano SIM | Nano SIM | Nano SIM |
| HD Voice | ||
| Yes | ||
| VoLTE | ||
| Yes | ||
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