Redmi A3 vs Samsung Galaxy S21
20Performance34.4
35.2Display49.1
20Camera40.8
38.8Battery36.9
20Features78.7
3 spec wins — Redmi A315 spec wins — Samsung Galaxy S21
InnoReviews verdict
Samsung Galaxy S21 wins this phone face-off, 43.6 to 26.8, pulling ahead mainly in features (+59) and camera (+21). Redmi A3 still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Redmi A3
- 25% higher capacity: 5,000 mAh vs 4,000 mAh
- Has 3.5mm jack — the other doesn't
- Lower launch price: $89 vs $799
Reasons to pick the Samsung Galaxy S21
- Stronger performance score: 34 vs 20
- Stronger display score: 49 vs 35
- Stronger camera score: 41 vs 20
- Stronger features score: 79 vs 20
- 579% higher AnTuTu 10: 746,547 vs 110,000
Display
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Screen size | 6.71 ″+8% | 6.2 ″ |
| Panel type | IPS LCD | AMOLED |
| Resolution | 1650x720 | 2400x1080 |
| Pixel density | 268 ppi | 421 ppi+57% |
| Refresh rate | 90 Hz | 120 Hz+33% |
| Peak brightness | — | 1,300 nits |
| AnTuTu 10 (CPU) | — | 252,025Top 94% |
| AnTuTu 10 (GPU) | — | 127,819Top 79% |
| AnTuTu 10 (Memory) | — | 144,909Top 91% |
| AnTuTu 10 (UX) | — | 221,794Top 88% |
Performance
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Chipset | MediaTek Helio G36 | Samsung Exynos 2100 |
| AnTuTu 10 | 110,000Top 99% | 746,547+579%Top 66% |
| Geekbench 6 (single) | — | 1,430Top 52% |
| Geekbench 6 (multi) | — | 3,550Top 56% |
| RAM (max) | 3 GB | 8 GB+167% |
| Storage options | 64GB / 128GB | 128GB / 256GB |
| Storage type | eMMC 5.1 | UFS 3.1 |
Camera
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Main camera | 8 MP | 12 MP+50% |
| Main aperture | f/2.0 | f/1.8 |
| Ultra-wide | — | 12 MP |
| Telephoto | — | 64 MP |
| Max video | 1080p@30fps | 8K@24fps |
| Front camera | 5 MP | 10 MP+100% |
| OIS | No | Yes |
Battery
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Capacity | 5,000 mAh+25% | 4,000 mAh |
| Wired charging | 10 W | 25 W+150% |
| Wireless charging | — | 15 W |
Design
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Weight | 193 g | 171 g+11% |
| Thickness | 8.3 mm | 7.9 mm+5% |
| IP rating | — | IP68 |
| Frame material | Plastic | Aluminum |
Connectivity
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| 5G | No | Yes |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6 |
| Bluetooth | 5.3 | 5.0 |
| NFC | No | Yes |
| USB | USB-C 2.0 | USB-C 3.2 |
| eSIM | No | Yes |
Software
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| OS at launch | Android 14 | Android 11 (One UI 3.1) |
| OS update pledge | 2 years | 4 years+100% |
Audio
| Spec | Redmi A3 | Samsung Galaxy S21 |
|---|---|---|
| Stereo speakers | No | Yes |
| 3.5mm jack | Yes | No |