Infinix Zero Ultra vs Redmi K90

The Infinix Zero Ultra (2022) runs on the MediaTek Dimensity 920, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 leads — 68/100 vs 37/100 (a 31-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 4500); the main camera is 200 MP vs 50 MP; the Redmi K90 has NFC for contactless payments, the Infinix Zero Ultra doesn't.

The Redmi K90 significantly outperforms the Infinix Zero Ultra by 31 points (68/100 vs 37/100).
Profile comparison
Category scores
Infinix Zero Ultra
Performance 0
Display 100
Camera 54
Battery 49
Design 33
Value for money 55
Redmi K90
Performance 69
Display 100
Camera 53
Battery 71
Design 42
Value for money 82
What makes Infinix Zero Ultra better?
  • Faster charging: 180W vs 100W
  • Better main camera: 200MP vs 50MP

  • Better camera (54/100 vs 53/100)
What makes Redmi K90 better?
  • Bigger battery: 7100 vs 4500 mAh
  • Lighter: 206g vs 213g

  • Higher performance (69/100 vs 0/100)
  • Longer battery life (71/100 vs 49/100)
  • Better design/ergonomics (42/100 vs 33/100)
  • Better value for money (82/100 vs 55/100)
Comparison verdict

Comparing the Infinix Zero Ultra vs the Redmi K90, the Redmi K90 scores 31 points higher (68/100 vs 37/100). In the "performance" category, the Redmi K90 leads (69/100 vs 0/100). In the "battery" category, the Redmi K90 leads (71/100 vs 49/100). In the "value for money" category, the Redmi K90 leads (82/100 vs 55/100). In the "performance" category, the Redmi K90 significantly outperforms the Infinix Zero Ultra (69/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Infinix Zero Ultra and the Redmi K90 are nearly equal (54/100 vs 53/100). In the "battery" category, the Redmi K90 notably outperforms the Infinix Zero Ultra (71/100 vs 49/100). In the "design" category, the Redmi K90 is a bit better (42/100 vs 33/100). In the "value for money" category, the Redmi K90 notably outperforms the Infinix Zero Ultra (82/100 vs 55/100).

Infinix Zero Ultra: The Infinix Zero Ultra is a better fit for everyday use.
Redmi K90: The Redmi K90 is a better fit for active users, budget-conscious buyers.
Specs comparison
Specification Infinix Zero Ultra Redmi K90
Processor MediaTek Dimensity 920 Qualcomm Snapdragon 8 Elite
AnTuTu 3088357
Geekbench Single 3050
Geekbench Multi 9300
Display 6.8" AMOLED 6.6" AMOLED
Resolution 1080x2400 2510x1156
Refresh rate 120 Hz 120 Hz
Battery 4500 mAh 7100 mAh
Charging 180W 100W
Main camera 200 MP 50 MP
Ultrawide 13 MP 8 MP
Telephoto 0 MP 50 MP
Front camera 32 MP 20 MP
RAM 8GB 12GB / 16GB
Storage 256GB 256GB / 512GB
OS Android 12, XOS 12 Android 16
Brightness (peak) 3500 nits
NFC no yes
Protection IP68
Dimensions 165.5×74.5×8.8 mm 157.5×75.3×8.0 mm
Weight 213 g 206 g
Price $401
Camera comparison
Infinix Zero Ultra
  • Main: 200MP f/f/2.0
  • Ultrawide: 13MP
  • Front: 32MP
54
camera
Redmi K90
  • Main: 50MP f/f/1.9
  • Ultrawide: 8MP
  • Telephoto: 50MP
  • Front: 20MP
53
camera
Display comparison
Infinix Zero Ultra
  • 6.8" AMOLED
  • Resolution: 1080x2400
  • Refresh rate: 120 Hz
100
display
Redmi K90
  • 6.6" AMOLED
  • Resolution: 2510x1156
  • Refresh rate: 120 Hz
100
display
Battery and charging
Infinix Zero Ultra
  • 4500 mAh
  • Wired: 180W
  • No wireless charging
49
battery
Redmi K90
  • 7100 mAh
  • Wired: 100W
  • No wireless charging
71
battery
Benchmarks
Price and availability
Infinix Zero Ultra
Price unknown
Redmi K90
$401
Detailed category analysis
performance

In the "performance" category, the Redmi K90 significantly outperforms the Infinix Zero Ultra (69/100 vs 0/100).

display

In the "display" category, both devices are on the same level — 100/100.

camera

In the "camera" category, the Infinix Zero Ultra and the Redmi K90 are nearly equal (54/100 vs 53/100).

battery

In the "battery" category, the Redmi K90 notably outperforms the Infinix Zero Ultra (71/100 vs 49/100).

design

In the "design" category, the Redmi K90 is a bit better (42/100 vs 33/100).

value for money

In the "value for money" category, the Redmi K90 notably outperforms the Infinix Zero Ultra (82/100 vs 55/100).

Frequently asked questions
Which is better: the Infinix Zero Ultra or the Redmi K90?

The Redmi K90 significantly outperforms the Infinix Zero Ultra by 31 points (68/100 vs 37/100).

What is the rating of the Infinix Zero Ultra and the Redmi K90?

The Infinix Zero Ultra has a MobileRank rating of 37/100, the Redmi K90 — 68/100.

Which is more powerful: the Infinix Zero Ultra or the Redmi K90?

The Redmi K90 leads on performance (69/100 vs 0/100).

Should you choose the Infinix Zero Ultra over the Redmi K90?

The Infinix Zero Ultra is a better fit for everyday use. The Redmi K90 is a better fit for active users, budget-conscious buyers.