Infinix Smart3 Plus vs Redmi K90 Ultra
The Infinix Smart3 Plus (2019) runs on the MediaTek Helio A22, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 18/100 (a 55-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 3500); the main camera is 13 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 155,362); the Redmi K90 Ultra has NFC for contactless payments, the Infinix Smart3 Plus doesn't; the Infinix Smart3 Plus is noticeably lighter (148g vs 227g).
Infinix Smart3 Plus
Redmi K90 Ultra
- Lighter: 148g vs 227g
- Better portability (85/100 vs 40/100)
- Higher AnTuTu: 3233695 vs 155362
- Better Geekbench Single: 3041 vs 300
- Better Geekbench Multi: 9494 vs 486
- Bigger battery: 8550 vs 3500 mAh
- Better main camera: 50MP vs 13MP
- Higher performance (92/100 vs 10/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 15/100)
- Better display (94/100 vs 39/100)
Comparing the Infinix Smart3 Plus vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 55 points higher (73/100 vs 18/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 10/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 15/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (92/100 vs 10/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (94/100 vs 39/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Infinix Smart3 Plus (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (78/100 vs 15/100). In the "portability" category, the Infinix Smart3 Plus significantly outperforms the Redmi K90 Ultra (85/100 vs 40/100).
| Specification | Infinix Smart3 Plus | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio A22 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 155362 | 3233695 | |
| Geekbench Single | 300 | 3041 | |
| Geekbench Multi | 486 | 9494 | |
| Display | 6.2" LTPS IPS LCD | 6.8" AMOLED | |
| Resolution | 720x1520 | 1280x2772 | |
| Refresh rate | — | 165 Hz | |
| Battery | 3500 mAh | 8550 mAh | |
| Charging | — | 100W | |
| Main camera | 13 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 3GB | 12GB / 16GB | |
| Storage | 32GB | 256GB / 512GB | |
| OS | Android 9.0 (Pie) | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 157.0×76.0×7.8 mm | 162.9×77.9×8.2 mm | |
| Weight | 148 g | 227 g | |
| Launch price | — | $420 |
Infinix Smart3 Plus
- Main: 13MP f/f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Infinix Smart3 Plus
- 6.2" LTPS IPS LCD
- Resolution: 720x1520
- Refresh rate: —
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Infinix Smart3 Plus
- 3500 mAh
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Infinix Smart3 Plus and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Infinix Smart3 Plus by 95.2% in our overall performance rating.
Infinix Smart3 Plus
Price unknownperformance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (92/100 vs 10/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (94/100 vs 39/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Infinix Smart3 Plus (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus (78/100 vs 15/100).
portability
In the "portability" category, the Infinix Smart3 Plus significantly outperforms the Redmi K90 Ultra (85/100 vs 40/100).
Which is better: the Infinix Smart3 Plus or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Infinix Smart3 Plus by 55 points (73/100 vs 18/100).
What is the rating of the Infinix Smart3 Plus and the Redmi K90 Ultra?
The Infinix Smart3 Plus has a MobileRank rating of 18/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Infinix Smart3 Plus or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Infinix Smart3 Plus or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 10/100).
Should you choose the Infinix Smart3 Plus over the Redmi K90 Ultra?
The Infinix Smart3 Plus is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.