Xiaomi Redmi 7A vs Samsung Galaxy A21s
29
out of 100
VS
36
out of 100
Here we compared two budget smartphones: the 5.45-inch Xiaomi Redmi 7A (with Qualcomm Snapdragon 439) that was released on May 28, 2019, against the Samsung Galaxy A21s, which is powered by Exynos 850 and came out 1 year after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.
Select the amount of RAM to evaluate performance and value for money more precisely
Key differences
Reasons to consider the Xiaomi Redmi 7A
- Water-resistant body (IPX4 classification)
- 59% faster in single-core GeekBench 6 test: 477 and 300 points
- Weighs 27 grams less
Reasons to consider the Samsung Galaxy A21s
- Has a 1.05 inches larger screen size
- Shows 45% longer battery life (25:00 vs 17:13 hours)
- 67% better performance in AnTuTu Benchmark (258K versus 154K)
- Comes with 1000 mAh larger battery capacity: 5000 vs 4000 mAh
- Modern USB Type-C port
- Newer Bluetooth version (v5)
- Uses a faster type of memory: LPDDR4X 1866 MHz
- More recent OS version: Android 12 versus 10
- Fingerprint scanner
- Compatible with Wi-Fi 5 wireless networks
- More energy-efficient CPU – Exynos 850
- Thinner bezels – 8.5% more screen real estate
- The phone is 1 year newer
Review
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Scores with a red asterisk (*) are approximate and may change in the future as we gather more data.
Select your primary usage scenario to get a more accurate NanoReview Score
Value for money (Beta)
Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | IPS LCD | PLS TFT |
| Size | 5.45 inches | 6.5 inches |
| Resolution | 720 x 1440 pixels | 720 x 1600 pixels |
| Aspect ratio | 18:9 | 20:9 |
| PPI | 295 ppi | 270 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Adaptive refresh rate | No | No |
| Max rated brightness | 530 nits | 540 nits |
| HDR support | No | No |
| Screen protection | Tempered glass | Tempered glass |
| Screen-to-body ratio | 74.4% | 82.9% |
| RGB color space | 94.2% | 88.4% |
| PWM | 384 Hz | 500 Hz |
| Response time | 27 ms | 30.4 ms |
| Contrast | 888:1 | 1500:1 |
Screen space comparison
Galaxy A21s
6.5″ (20:9 ratio) = 15.8 in2
Redmi 7A
5.45″ (18:9 ratio) = 11.9 in2
~33% more screen space
Peak brightness test (auto)
Design and build
| Height | 146.3 mm (5.76 inches) | 163.6 mm (6.44 inches) |
| Width | 70.4 mm (2.77 inches) | 75.3 mm (2.96 inches) |
| Thickness | 9.5 mm (0.37 inches) | 8.9 mm (0.35 inches) |
| Weight | 165 g (5.82 oz) | 192 g (6.77 oz) |
| Waterproof | IPX4 | No |
| Rear material | Plastic | Plastic |
| Frame material | Plastic | Plastic |
| Colors | Black, Blue, Red | Black, Blue, Red |
| Fingerprint scanner | No | Yes, rear |
Screen-to-body ratio
Performance
| Chipset | Qualcomm Snapdragon 439 | Samsung Exynos 850 |
| Max clock | 2000 MHz | 2000 MHz |
| CPU cores | 8 (4 + 4) | 8 (8) |
| Architecture | - 4 cores at 1.45 GHz: Cortex-A53 - 4 cores at 2 GHz: Cortex-A53 |
- 8 cores at 2 GHz: Cortex-A55 |
| Manufacturing | Samsung | Samsung |
| Lithography process | 12 nanometers | 8 nanometers |
| Neural processor (NPU) | Hexagon 536 | No |
| Graphics | Adreno 505 | Mali-G52 MP6 |
| GPU shading units | 48 | 16 |
| GPU clock | 650 MHz | 1001 MHz |
| FLOPS | ~62.4 GFLOPS | ~48 GFLOPS |
Benchmarks
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
| Single-core score | 477 | 300 |
| Multi-core score | 1521 | 836 |
AnTuTu Benchmark 11
| CPU | 57573 | 100392 |
| GPU | 12621 | 18008 |
| Memory | 27250 | 86289 |
| UX | 57254 | 53375 |
| Total score | 154698 | 258064 |
| Samples | Less than 3 | [4 tests] |
PCMark 3.0
| Web score | - | 4948 |
| Video editing | - | 5163 |
| Photo editing | - | 8993 |
| Data manipulation | - | 3929 |
| Writing score | - | 5825 |
Recent User Tests
Xiaomi Redmi 7A
No benchmark results yet
Samsung Galaxy A21s
| Date | Benchmark | Result |
|---|---|---|
| 📘 2026-09-18 -> HABIBO | AnTuTu 12 | 304257 |
| 📘 2026-05-16 (Abdul ahad) | AnTuTu 11 | 258064 |
| 📘 2026-03-29 -> quandzvl12 | AnTuTu 11 | 316736 |
| 📘 2025-10-08 (MinxK) | AnTuTu 11 | 231817 |
| 📘 2025-10-04 (zayedbinnahyan) | AnTuTu 11 | 218341 |
Memory
| RAM size | 2 GB | 2 GB |
| Memory type | LPDDR3 | LPDDR4X |
| Memory clock | 933 MHz | 1866 MHz |
| Channels | 1 | 2 |
| Storage size | 16 GB | 32 GB |
| Storage type | eMMC 5.1 | eMMC 5.1 |
| Memory card | MicroSD | MicroSD |
| Memory card max size | Up to 512 GB | Up to 512 GB |
Software
| Operating system | Android 9.0 (Can be upgraded to Android 10) | Android 10 (Can be upgraded to Android 12) |
| ROM | MIUI 12 | One UI 4.1 |
| OS size | 6.4 GB | 12 GB |
| OS updates | - | 2 years |
| Security updates | - | 4 years |
Battery
| Capacity | 4000 mAh | 5000 mAh |
| Max charge power | - | 15 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | No | No |
| Reverse charging | No | No |
| Fast charging | No | Yes (50% in 60 min) |
| Full charging time | 2:35 hr | 2:10 hr |
| Web browsing | 06:26 hr | 09:45 hr |
| Watching video | 09:44 hr | 14:13 hr |
| Gaming | 04:10 hr | 05:34 hr |
| Standby | 90 hr | 128 hr |
General battery life
Main camera
| Matrix | 12 megapixels | 48 megapixels |
| Image resolution | 4128 x 3096 | 8000 x 6000 |
| Zoom | Digital | Digital |
| Flash | LED | LED |
| Stabilization | Digital | Digital |
| 8K video recording | No | No |
| 4K video recording | No | No |
| 1080p video recording | Up to 30FPS | Up to 30FPS |
| Slow motion | No | No |
| Angle of widest lens | - | 123° |
| Lenses | 1) Standard: 12 MP |
1) Standard: 48 MP 2) Ultrawide: 8 MP 3) Macro: 2 MP 4) Depth: 2 MP |
| Camera features | - | - Bokeh mode |
| Image resolution | 12 MP | 48 MP |
| Aperture | f/2.2 | f/2.0 |
| Focal length | - | 26 mm |
| Sensor | Sony IMX486 | Samsung S5KGM2 |
| Sensor size | 1/2.9" (≈ 0.34 inch) | 1/2.0" (≈ 0.5 inch) |
| Pixel size | 1.12 micron | 0.8 micron |
| Autofocus | Phase autofocus | Phase autofocus |
| Stabilization | Digital | Digital |
| Image resolution | - | 8 MP |
| Aperture | - | f/2.2 |
| Sensor size | - | 1/4.0" (≈ 0.25 inch) |
| Pixel size | - | 1.12 micron |
| Stabilization | - | Digital |
| Image resolution | - | 2 MP |
| Aperture | - | f/2.4 |
| Stabilization | - | Digital |
Selfie camera
| Megapixels | 5 megapixels | 13 megapixels |
| Image resolution | 2592 x 1944 | 4128 x 3096 |
| Aperture | f/2.2 | f/2.2 |
| Sensor | GalaxyCore | CMOS |
| Sensor size | 1/5" (≈ 0.2 inch) | 1/3.1" (≈ 0.32 inch) |
| Pixel size | 1.12 micron | 1.12 micron |
| Autofocus | No | No |
| Stabilization | Digital | Digital |
| Video resolution | 1080p (Full HD) at 30 FPS | 1080p (Full HD) at 30 FPS |
| Depth sensor (TOF 3D) | No | No |
Connectivity
| Wi-Fi standard | Wi-Fi 4 (802.11 b/g/n) | Wi-Fi 5 (802.11 a/b/g/n/ac) |
| Wi-Fi features | - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 4.2 | 5 |
| Bluetooth features | LE, A2DP | PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP |
| USB type | Micro USB | USB Type-C |
| USB version | 2 | 2 |
| USB features | - Charging - USB-Storage mode - USB-Host mode - OTG |
- Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou | GPS, GLONASS, Beidou, Galileo |
| NFC* | No | Yes |
| Infrared port | No | No |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| Multi SIM mode | Standby | Standby |
| eSIM support* | No | No |
| Hybrid slot | No | No |
| LTE Cat* | 4 | 13 |
| 5G support | No | No |
Sound
| Speakers | Mono | Mono |
| Headphone audio jack | Yes | Yes |
| FM radio | Yes | Yes |
| Dolby Atmos | No | Yes |
Speakers test
Max loudness
Other
| Category | Budget | Budget |
| Announced | May 2019 | May 2020 |
| Release date | June 2019 | June 2020 |
| Launch price (MSRP) | $85 | $200 |
| Successor | - | - Samsung Galaxy A24 4G |
| SAR (head) | 0.557 W/kg | 0.23 W/kg |
| SAR (body) | 1.166 W/kg | 1.38 W/kg |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass |
- Hall-effect sensor - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Conclusion
After analyzing all the data, we think that the Samsung Galaxy A21s is definitely a better buy.
Cast your vote
Total votes: 20
