Xiaomi Redmi A2 vs Samsung Galaxy S21 Ultra
37
out 100
VS
67
out 100
Compared 2 smartphones : Xiaomi Redmi A2 Manufactured in March, 2023, with display 6.52 with chipsetMediaTek Helio G36, vs Samsung Galaxy S21 Ultra, Manufactured in February, 2021 with chipsetSamsung Exynos 2100. Below are specs, tests, pros and cons for each device
Key Differences
Reasons to choose Xiaomi Redmi A2
- Lighter design: 192g vs 227g
- Includes charger
Reasons to choose Samsung Galaxy S21 Ultra
- Larger display: 6.8in
- Higher pixel density: 515ppi
- Higher refresh rate: 120Hz
- Newer Bluetooth version: 5.2 vs 5
- Supports newer USB: 3.2 vs 2
- Supports Dolby Atmos
- Built-in eSIM
- Fingerprint scanner
Versions
| Memory Options | - 2/32 GB - 2/64 GB - 3/32 GB - 3/64 GB - 4/64 GB |
- 12/128 GB - 12/256 GB - 12/512 GB - 16/256 GB - 16/512 GB |
Review
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
Adjust each parameter’s importance to find the best match for you.
Tests & specs
Specs & test comparisonDisplay
| Type | IPS LCD | Dynamic AMOLED |
| Size | 6.52 in | 6.8 in |
| Resolution | 720x1600 pixels | 1440x3200 pixels |
| Aspect ratio | 20:9 | 20:9 |
| Pixel density | 269 ppi | 515 ppi |
| Refresh rate | 60 Hz | 120 Hz |
| Adaptive refresh rate | No | Yes (10-120 Hz) |
| Max brightness | 400 nits | 1500 nits |
| HDR support | No | Yes HDR10+ |
| Screen-to-body ratio | 81.1 % | 89.5 % |
| Features | n/a | - DCI-P3 - Always-On Display |
| sRGB gamut | 95 % | n/a |
| Response time | 30 ms | n/a |
| Contrast | 1303:1 | n/a |
Design & Build
| Height | 164.9 mm (6.49 in) | 165.1 mm (6.5 in) |
| Width | 76.8 mm (3.02 in) | 75.6 mm (2.98 in) |
| Thickness | 9.1 mm (0.36 in) | 8.9 mm (0.35 in) |
| Weight | 192 g (6.77 oz) | 227 g (8.01 oz) |
| Water resistance | No | IP68 |
| Back panel | Plastic | Glass |
| Frame | Plastic | Metal |
| Colors | - Black - Blue - Green |
- Black - Silver - Gray - Blue |
| Fingerprint sensor | No | Yes In-Display |
Screen-to-body ratio
Performance
| Chipset | MediaTek Helio G36 | Samsung Exynos 2100 |
| Max Frequency | 2200 MHz | 2900 MHz |
| CPU Cores | 8 (4 + 4) | 8 (1 + 3 + 4) |
| Architecture | - 4/1.8 (Cortex-A53) - 4/2.2 (Cortex-A53) |
- 4/2.2 (Cortex-A55) - 3/2.81 (Cortex-A78) - 1/2.91 (Cortex-X1) |
| Process | TSMC | Samsung |
| Transistor Size | 12 nm | 5 nm |
| Neural Processor | No | Yes |
| Graphics | PowerVR GE8320 | Mali-G78 MP14 |
| GPU Cores | 32 | 896 |
| GPU Frequency | 680 MHz | 854 MHz |
| FLOPS | 43.5 GFLOPS | 1530.4 GFLOPS |
| Geekbench 6 (Single-Core) | 477 | 1449 |
| Geekbench 6 (Multi-Core) | 1523 | 3892 |
| CPU | 42168 | 232358 |
| GPU | 17833 | 256356 |
| Memory | 40327 | 163007 |
| UX | 30783 | 191217 |
| NanoReview Score | 131111 | 843008 |
| Max Surface Temp. | n/a | 40.8 °C |
| Stability | n/a | 69 % |
| Graphics Test | n/a | 31 fps |
| Graphics Score | n/a | 5221 |
Memory
| RAM Size | - 2 GB - 3 GB |
- 12 GB - 16 GB |
| Memory Type | LPDDR4X | LPDDR5 |
| Memory Frequency | 1600 MHz | 2750 MHz |
| Channels | 2 | 2 |
| Storage Capacity | 32 GB | - 128 GB - 256 GB - 512 GB |
| Storage Type | eMMC 5.1 | UFS 3.1 |
| Memory Card | MicroSD | No |
Software
| OS | Android 12 | Android 11 (Upgradeable to Android 14) |
| OS Size | n/a | 26.4 GB |
| UI Skin | MIUI 14 | One UI 6 |
Battery
| Volume | 5000 mAh | 5000 mAh |
| Max Charging Power | 10 W | 25 W |
| Battery Type | Li-ion | Li-ion |
| Removable | No | No |
| Wireless Charging | No | Yes (15 W) |
| Reverse Charging | No | Yes (Wireless) |
| Fast Charging | No | Yes (54% in 30 min) |
| Full Charge Time | 2:43 h | 1:11 h |
| Web Browsing | n/a | 07:58 h |
| Video Playback | n/a | 13:59 h |
| Games | n/a | 05:14 h |
| Standby Mode | n/a | 111 h |
Main camera
| Matrix | 8 MP | 108 MP |
| Photo resolution | 3264x2448 pixels | 12000x9000 pixels |
| Zoom | Digital | Optical, 10x |
| Flash | LED | Dual LED |
| Stabilization | Digital | Optical |
| 8K Recording | No | Up to 24FPS |
| 4K Recording | No | Yes (Up to 60 fps) |
| 1080p Recording | Yes (Up to 30 fps) | Yes (Up to 60 fps) |
| Slow Motion | No | 960 fps (720p) |
| Wide-angle lens | n/a | 120 ° |
| Lenses count | Standard: 8 MP Depth: 0.08 MP |
Standard: 108 MP Telephoto: 10 MP Telephoto: 10 MP Ultra-wide: 12 MP |
| Features | Bokeh effect | - Bokeh effect - Pro mode - RAW support |
| Matrix | 8 MP | 108 MP |
| Aperture | f/2.0 | f/1.8 |
| Focal length | n/a | 26 mm |
| Sensor | n/a | Samsung S5KHM3 |
| Sensor size | n/a | 1/1.33 |
| Pixel size | n/a | 0.8 μm |
| Autofocus | Phase autofocus | Laser autofocus |
| Stabilization | Digital | Optical |
| Matrix | n/a | 10 MP |
| Aperture | n/a | f/4.9 |
| Focal length | n/a | 240 mm |
| Sensor | n/a | Samsung S5K3J1 |
| Sensor size | n/a | 1/2.65 |
| Pixel size | n/a | 1.22 μm |
| Stabilization | n/a | Optical |
| Matrix | n/a | 12 MP |
| Aperture | n/a | f/2.2 |
| Focal length | n/a | 13 mm |
| Sensor | n/a | Sony IMX563 |
| Sensor size | n/a | 1/2.55 |
| Pixel size | n/a | 1.4 μm |
| Stabilization | n/a | Digital |
| Bokeh | n/a | 70 |
| Preview | n/a | 67 |
| Zoom | n/a | 106 |
Front camera
| Matrix | 5 MP | 40 MP |
| Photo resolution | 2592x1944 pixels | 7864x5200 pixels |
| Aperture | f/2.2 | f/2.2 |
| Focal length | n/a | 26 mm |
| Sensor | CMOS | Samsung S5KGH1 |
| Sensor size | n/a | 1/2.65 |
| Pixel size | n/a | 0.7 μm |
| Autofocus | No | Phase autofocus |
| Stabilization | Digital | Digital |
| Video resolution | 1080p (Full HD) at 30 fps | 2160p (4K) at 60 fps |
| TOF 3D sensor | No | No |
Connectivity
| Wi-Fi version | Wi-Fi 4 (802.11 a/b/g/n) | Wi-Fi 6E (802.11 a/b/g/n/ac/ax) |
| Wi-Fi features | - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5 | 5.2 |
| Bluetooth features | LE | LE, A2DP |
| USB type | Micro USB | USB Type-C |
| USB version | 2 | 3.2 |
| USB features | - Charging - USB Storage Mode |
- Charging - USB Storage Mode - USB-Host mode - OTG |
| GPS | - GPS - GLONASS - Galileo |
- GPS - GLONASS - Beidou - Galileo |
| NFC* | No | Yes |
| Infrared Port | No | No |
| SIM Count* | 2 | 2 |
| SIM Type | Nano | Nano |
| SIM Mode | Dual SIM Standby | Dual SIM Standby |
| eSIM Support * | No | Yes |
| Hybrid Slot | No | No |
| 2G Bands | n/a | GSM 850, 900, 1800, 1900 MHz |
| 3G Bands | n/a | WCDMA Band 1, 2, 4, 5, 8 |
| LTE Bands* | n/a | LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66) |
| LTE category | 4 | 24 |
| 5G Support | No | Yes |
Sound
| Speakers | Mono | Stereo |
| 3.5 mm Jack | Yes | No |
| FM Radio | Yes | No |
| Dolby Atmos | No | Yes |
Other
| Class | Budget | Flagship |
| Announced | March, 2023 yr | January, 2021 yr |
| Release Date | March, 2023 yr | February, 2021 yr |
| Launch Price ($) | 115 | 1200 |
| Sensors | Accelerometer | - Hall Sensor - Barometer - Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor |
| Charger Included | Yes 10 W | n/a |
*
Attention!
Config, frequencies, NFC, and other specs may vary by region.
Results
After analyzing the data, we consider Samsung Galaxy S21 Ultra the clear winner in this comparison.
Survey
Total Votes: 0
