Fairphone 4 vs Redmi K90
The Fairphone 4 (2021) runs on the Snapdragon 750G, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $449 and $401. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 31/100 (a 45-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 3905); the main camera is 48 MP vs 50 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 566,483); the Redmi K90 is noticeably lighter (206g vs 225g).
Profile comparison
Category scores
Fairphone 4
Redmi K90
What makes Fairphone 4 better?
- Overall rating 31/100
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 566483
- Better Geekbench Single: 3013 vs 601
- Better Geekbench Multi: 9287 vs 1882
- Bigger battery: 7100 vs 3905 mAh
- Faster charging: 100W vs 20W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 120Hz vs 60Hz
- Lighter: 206g vs 225g
- Cheaper at launch: $401 vs $449
- Higher performance (91/100 vs 41/100)
- Better camera (58/100 vs 18/100)
- Longer battery life (72/100 vs 20/100)
- Better display (82/100 vs 43/100)
- Better portability (55/100 vs 28/100)
Comparison verdict
Comparing the Fairphone 4 vs the Redmi K90, the Redmi K90 scores 45 points higher (76/100 vs 31/100). In the "performance" category, the Redmi K90 leads (91/100 vs 41/100). In the "camera" category, the Redmi K90 leads (58/100 vs 18/100). In the "battery" category, the Redmi K90 leads (72/100 vs 20/100). Value score: Fairphone 4 — 0/100, Redmi K90 — 80/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Redmi K90 significantly outperforms the Fairphone 4 (91/100 vs 41/100). In the "display" category, the Redmi K90 significantly outperforms the Fairphone 4 (82/100 vs 43/100). In the "camera" category, the Redmi K90 significantly outperforms the Fairphone 4 (58/100 vs 18/100). In the "battery" category, the Redmi K90 significantly outperforms the Fairphone 4 (72/100 vs 20/100). In the "portability" category, the Redmi K90 notably outperforms the Fairphone 4 (55/100 vs 28/100).
Specs comparison
| Specification | Fairphone 4 | Redmi K90 | |
|---|---|---|---|
| Processor | Snapdragon 750G | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 566483 | 3077585 | |
| Geekbench Single | 601 | 3013 | |
| Geekbench Multi | 1882 | 9287 | |
| Display | 6.3" IPS LCD | 6.6" AMOLED | |
| Resolution | 1080x2340 | 2510x1156 | |
| Refresh rate | 60 Hz | 120 Hz | |
| Battery | 3905 mAh | 7100 mAh | |
| Charging | 20W | 100W | |
| DXOMark (camera) | 69 | — | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 48 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 25 MP | 20 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 11 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP54 | IP68 | |
| Dimensions | 162.0×75.5×10.5 mm | 157.5×75.3×8.0 mm | |
| Weight | 225 g | 206 g | |
| Launch price | $449 | $401 |
Camera comparison
Fairphone 4
- Main: 48MP f/1.6
- Ultrawide: 48MP
- Front: 25MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Fairphone 4
- 6.3" IPS LCD
- Resolution: 1080x2340
- Refresh rate: 60 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
Fairphone 4
- 3905 mAh
- Wired: 20W
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Fairphone 4 and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads Fairphone 4 by 81.6% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $48. Redmi K90 was $48 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Fairphone 4 (91/100 vs 41/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Fairphone 4 (82/100 vs 43/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Fairphone 4 (58/100 vs 18/100).
battery
In the "battery" category, the Redmi K90 significantly outperforms the Fairphone 4 (72/100 vs 20/100).
portability
In the "portability" category, the Redmi K90 notably outperforms the Fairphone 4 (55/100 vs 28/100).
Frequently asked questions
Which is better: the Fairphone 4 or the Redmi K90?
The Redmi K90 significantly outperforms the Fairphone 4 by 45 points (76/100 vs 31/100).
What is the rating of the Fairphone 4 and the Redmi K90?
The Fairphone 4 has a MobileRank rating of 31/100, the Redmi K90 — 76/100.
Which has the better camera: the Fairphone 4 or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 18/100).
Which is more powerful: the Fairphone 4 or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 41/100).
Should you choose the Fairphone 4 over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.