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).
Profile comparison
Category scores
Infinix Smart3 Plus
Redmi K90 Ultra
What makes Infinix Smart3 Plus better?
- Lighter: 148g vs 227g
- Better portability (85/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 155362
- Better Geekbench Single: 3013 vs 300
- Better Geekbench Multi: 9287 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)
Comparison verdict
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).
Specs comparison
| Specification | Infinix Smart3 Plus | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio A22 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 155362 | 3233695 | |
| Geekbench Single | 300 | 3013 | |
| Geekbench Multi | 486 | 9287 | |
| 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 |
Camera comparison
Infinix Smart3 Plus
- Main: 13MP f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Infinix Smart3 Plus
- 6.2" LTPS IPS LCD
- Resolution: 720x1520
- Refresh rate: —
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Infinix Smart3 Plus
- 3500 mAh
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
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.
Benchmarks
Launch prices and where to check today's
Infinix Smart3 Plus
Price unknownDetailed category analysis
performance
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).
Frequently asked questions
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 Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.