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- Galaxy S21 FE vs Redmi K40
Samsung Galaxy S21 FE vs Xiaomi Redmi K40
What Galaxy S21 FE does better (9) and where Redmi K40 wins (5) — every spec side by side.
vs
7.6Display7.9
8.4Camera6.7
4.3Battery4.2
8.9Features8.7
Dimensions
Size comparison
Galaxy S21 FERedmi K40
| Galaxy S21 FE | Redmi K40 | Difference | |
|---|---|---|---|
| Height | 155.7 mm | 163.7 mm | −8 mm |
| Width | 74.5 mm | 76.4 mm | −1.9 mm |
| Thickness | 7.9 mm | 7.8 mm | +0.1 mm |
| Weight | 177 g | 196 g | −19 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Galaxy S21 FE better than Redmi K40?
- Optical stabilisationYes · Redmi K40: No
- Telephoto cameraYes · Redmi K40: No
- Wireless chargingYes · Redmi K40: No
- 4K selfie videoYes · Redmi K40: No
- Weight177 g vs 196 g+11%
- Pixel density411 ppi vs 395 ppi+4%
- Selfie camera32 MP vs 20 MP+60%
- Rear cameras3 vs 2+50%
- USB version3 vs 2+50%
Why is Redmi K40 better than Galaxy S21 FE?
- Main camera12 MP vs 48 MP4×
- Wired charging25 W vs 33 W+32%
- Max video1080p vs 4K
- CPU frequency2.8 GHz vs 3.2 GHz+14%
- Screen size6.4″ vs 6.7″+4%
Specifications
Side by side
| Design | ||
| Weight | 177 g | 196 g |
| Thickness | 7.9 mm | 7.8 mm |
| Height | 155.7 mm | 163.7 mm |
| Width | 74.5 mm | 76.4 mm |
| Frame | Aluminium | — |
| Back | Plastic | — |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Glass protection | Gorilla Glass Victus | Corning Gorilla Glass 5 |
| Colours | — | Black, White, Aurora |
| Display | ||
| Screen size | 6.4″ | 6.7″ |
| Panel | Dynamic Amoled 2X | Super AMOLED |
| OLED panel | Yes | Yes |
| Resolution (width) | 1,080 px | 1,080 px |
| Resolution (height) | 2,400 px | 2,400 px |
| Pixel density | 411 ppi | 395 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | — | 1,300 nits |
| Screen-to-body ratio | — | 85.9% |
| HDR | Yes | Yes |
| Performance | ||
| Chipset | Qualcomm Snapdragon 888 | Qualcomm SM8250-AC Snapdragon 870 5G |
| Chip maker | Qualcomm | Qualcomm |
| Process | — | 7 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2.8 GHz | 3.2 GHz |
| GPU | Adreno 660 | Adreno 650 |
| Memory | ||
| RAM | — | 12 GB |
| Storage (max) | — | 256 GB |
| Storage (base) | — | 128 GB |
| Storage type | — | UFS 3.1 |
| Memory card slot | No | No |
| Camera | ||
| Main camera | 12 MP | 48 MP |
| Main camera aperture | f/1.8 | f/1.8 |
| Main sensor size | — | 1/2.0" |
| Rear cameras | 3 | 2 |
| Optical stabilisation | Yes | No |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | Yes | No |
| Optical zoom | 3× | — |
| Max video | 1080p | 4K |
| 4K video frame rate | — | 30 fps |
| Selfie camera | 32 MP | 20 MP |
| 4K selfie video | Yes | No |
| Battery | ||
| Battery capacity | 4,500 mAh | 4,520 mAh |
| Battery type | — | Li-Po |
| Wired charging | 25 W | 33 W |
| Charged in 30 min | — | 58% |
| Wireless charging | Yes | No |
| Wireless charging power | 15 W | — |
| Reverse wireless charging | Yes | — |
| Connectivity | ||
| 5G | Yes | Yes |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 6 | Wi-Fi 6 |
| Bluetooth | — | 5.1 |
| NFC | Yes | Yes |
| USB | USB Type-C | USB Type-C 2.0 |
| USB version | 3 | 2 |
| Dual-band GPS | — | Yes |
| Satellite navigation | — | GLONASS, GALILEO, BDS, QZSS, NavIC |
| Features | ||
| Stereo speakers | Yes | Yes |
| 3.5 mm headphone jack | No | No |
| Fingerprint sensor | Under display | Side |
| Barometer | Yes | — |
| Sensors | proximity, accelerometer, gyro, light, compass, barometer, hall, fingerprint | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass |
| Software | ||
| OS at launch | Android 13 | Android 11 |
| Platform | Android | Android |
| Interface | One UI 4.0 | MIUI 12 |
