Infinix Zero 40 5Gvsitel S25 Ultra
SETTLEDUpdated September 8, 2026
Infinix Zero 40 5G wins
Verdict
Infinix Zero 40 5G wins 4 of 5 categories — our overall pick
Infinix Zero 40 5G is the overall winner, 4 / 5 — display is its standout. It costs USD 349 — USD 190 more than the itel S25 Ultra. Pay the premium if display is your priority.
- Infinix Zero 40 5G takes Performance — led by ram (12 GB).
- Infinix Zero 40 5G takes Display — led by refresh rate (144 Hz).
- Infinix Zero 40 5G takes Camera — led by selfie camera (50 MP).
- Infinix Zero 40 5G takes Battery — led by charging speed (45 W).
- itel S25 Ultra takes Price — led by price (159 USD).
Scores follow our published methodology · v2026.09
In plain English
Choose Infinix Zero 40 5G if you want…
- Choose Infinix Zero 40 5G if you want a faster phone for apps and games — 950,000 pts vs 320,000 pts.
- Choose Infinix Zero 40 5G if you want more apps open at once — 12 GB vs 8 GB.
- Choose Infinix Zero 40 5G if you want smoother scrolling — 144 Hz vs 120 Hz.
- Choose Infinix Zero 40 5G if you want a screen you can read in sunlight — 1,300 nits vs 550 nits.
- Choose Infinix Zero 40 5G if you want sharper selfies — 50 MP vs 32 MP.
- Choose Infinix Zero 40 5G if you want better video quality — 66 pts vs 44 pts.
- Choose Infinix Zero 40 5G if you want a better camera — 102 pts vs 72 pts.
- Choose Infinix Zero 40 5G if you want faster charging — 45 W vs 18 W.
Choose itel S25 Ultra if you want…
- Choose itel S25 Ultra if you want a lower price — 159 USD vs 349 USD.
At a glance
- Infinix Zero 40 5G
- itel S25 Ultra
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Best price now
The cheap alternative
Full record
Every spec, side by side — winners get a check and a proportional bar. Ties share the badge.
Performance score
Approximate benchmark score of the chipset — higher is faster for apps, games and AI.
Chipset
The processor inside — shown for reference, never decides a winner.
RAM
More RAM keeps more apps alive in the background.
Storage
Base onboard storage for photos, apps and media.
Screen size
Diagonal screen size — bigger is better for media, smaller is easier to hold.
Pixel density
Sharpness of the screen — above ~400 ppi looks crisp.
Refresh rate
How smooth scrolling and motion feel. 120 Hz is the modern standard.
Peak brightness
Peak brightness in sunlight — higher stays readable outdoors.
Main camera
Resolution of the primary rear camera — photo quality is judged by the Camera quality score, not megapixels.
Selfie camera
Resolution of the front camera.
Telephoto
A dedicated zoom lens for distant subjects without quality loss.
Video score
Composite video rating — stabilisation, 4K/8K support and colour.
Camera score
Composite camera quality from independent testing — how good the photos actually are.
Battery
Battery capacity — higher generally lasts longer.
Charging speed
Wired charging speed — higher refills faster.
Wireless charging
Whether the phone charges wirelessly.
Price
Typical MSRP in US dollars — lower is better value.
Which one should you buy?
Infinix Zero 40 5G
Choose Infinix Zero 40 5G if display matters most — it wins the most categories overall. It costs USD 349.
itel S25 Ultra
Choose itel S25 Ultra if price matters most. It costs USD 159, the lowest price in this group.
Pros & cons
Infinix Zero 40 5G
- 144 Hz curved AMOLED
- 108 MP camera with OIS
- 50 MP selfie
- Dimensity 8200 is mid-tier
- No telephoto
- Limited software updates
itel S25 Ultra
- Curved AMOLED 120 Hz
- Big 6.78-inch screen
- 256 GB storage
- Unisoc chip is slow
- 18 W charging
- Average camera