Redmi A4 5G vs Samsung Galaxy S21 Ultra
20Performance37.2
44.1Display56.3
29Camera72
40.3Battery46.4
36Features78.7
5 spec wins — Redmi A4 5G8 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 32.3, pulling ahead mainly in camera (+43) and features (+43). Redmi A4 5G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Redmi A4 5G
- Has 3.5mm jack — the other doesn't
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger performance score: 37 vs 20
- Stronger display score: 56 vs 44
- Stronger camera score: 72 vs 29
- Stronger battery score: 46 vs 40
- Stronger features score: 79 vs 36
Display
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.88 ″+1% | 6.8 ″ |
| Panel type | IPS LCD | LTPO AMOLED |
| Resolution | 720x1640 | 3200x1440 |
| Pixel density | 260 ppi | 515 ppi+98% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 600 nits | 1,500 nits+150% |
| Screen-to-body | 90 % | — |
Performance
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | Snapdragon 4s Gen 2 | Samsung Exynos 2100 |
| AnTuTu | — | 783,817Bottom 22% |
| AnTuTu 11 (CPU) | — | 263,424Bottom 17% |
| AnTuTu 11 (GPU) | — | 126,989Bottom 33% |
| AnTuTu 11 (Memory) | — | 165,563Bottom 35% |
| AnTuTu 11 (UX) | — | 227,841Bottom 20% |
| Geekbench 6 (single) | — | 1,430Top 46% |
| Geekbench 6 (multi) | — | 3,550Bottom 50% |
| RAM (max) | 4 GB | 12 GB+200% |
| Storage options | 64/128GB | 128GB / 256GB / 512GB |
| Storage type | UFS 2.2 | UFS 3.1 |
Camera
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.8 | f/1.8 |
| Ultra-wide | — | 12 MP |
| Telephoto | — | 10 MP |
| Optical zoom | — | 10 x |
| Max video | 1080p@30fps | 8K@24fps |
| Front camera | 5 MP | 40 MP+700% |
| OIS | — | Yes |
Battery
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 5,160 mAh+3% | 5,000 mAh |
| Wired charging | 18 W | 25 W+39% |
| Wireless charging | — | 15 W |
Design
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 212 g+7% | 228 g |
| Thickness | 8.2 mm+8% | 8.9 mm |
| IP rating | IP52 | IP68 |
| Frame material | Plastic | Aluminum |
Connectivity
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6E |
| Bluetooth | 5.0 | 5.2 |
| NFC | — | Yes |
| USB | USB-C | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 14 (HyperOS) | Android 11 (One UI 3.1) |
| OS update pledge | 2 years | 4 years+100% |
Audio
| Spec | Redmi A4 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | No | Yes |
| 3.5mm jack | Yes | No |
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