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Our Verdict
Analysis
Infinix Zero 40 4G has the bigger display.
Overall Winner
Infinix Zero 40 4G
Display Winner
Infinix Zero 40 4G
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie
Specifications Comparison
| Feature | Infinix Zero 40 4G | Xiaomi 15 Ultra |
|---|---|---|
| Display size (in) | 6.78 | 6.73 |
| Charging (W) | 45 | 90 |
| Main camera (MP) | 108.00 | 50.00 |
| Selfie (MP) | 50.00 | 32.00 |
| Weight (g) | 180 | 226 |
| Thickness (mm) | 7.70 | 9.35 |
| Chipset | Mediatek Helio G100 (6 nm) | Snapdragon 8 Elite |
| OS | Android 14, up to 2 major Android upgrades, XOS 14.5 | Android 15, HyperOS 2 |
Pros & Cons
Infinix Zero 40 4G
Xiaomi 15 Ultra
- Outstanding camera versatility
- Fast wired and wireless charging
- Bright display
- Heavy
- Software still polishing animations
- Limited availability in some regions
Every Spec, Side by Side
Specification
Infinix
Infinix Zero 40 4G
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
5000 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
45W wired, 50% in 25 min
10W reverse wired
Bypass Charging 2.0
90W wired, 80W wireless
Capacity
—
5410 mAh
Body 5 specs
Dimensions
164.3 x 74.6 x 7.7 mm (6.47 x 2.94 x 0.30 in)
161.3 x 75.3 x 9.35 mm
Weight
180 g (6.35 oz)
226 g
SIM
Nano-SIM + Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
IP54 dust protected and water resistant (water splashes)
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Aerospace-grade glass fiber
Build
—
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
Connectivity 8 specs
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
Yes
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
Yes
Yes
Infrared port
Yes
Yes
Radio
FM radio
No
USB
USB Type-C 2.0, OTG
USB Type-C 3.2 Gen 2, DisplayPort, OTG
5G
—
Yes
Display 4 specs
Type
AMOLED, 1B colors, 120Hz, 1300 nits (HBM)
LTPO AMOLED
Size
6.78 inches, 109.9 cm2 (~89.7% screen-to-body ratio)
6.73 inches
Resolution
1080 x 2436 pixels (~393 ppi density)
1440 x 3200 pixels
Protection
Corning Gorilla Glass 5
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
—
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2024, August 29
2025, February 27
Status
Available. Released 2024, September 08
Available. Released 2025, February 27
Main Camera 4 specs
Triple
108 MP, f/1.8, (wide), 1/1.67", PDAF, OIS
50 MP, f/2.0, 120˚, (ultrawide), 1/2.76", PDAF
Auxiliary lens
—
Features
Dual-LED flash, HDR, panorama
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
1440p@30fps, 1080p@30/60fps, gyro-EIS, OIS
8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)
Quad
—
50 MP + 50 MP + 200 MP + 50 MP
Memory 5 specs
Card slot
No
No
Internal
256GB 8GB RAM, 512GB 8GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
UFS 2.2
UFS 4.1
RAM
—
16GB
Storage
—
512GB
Misc 4 specs
Colors
Misty Aqua, Rock Black, Blossom Glow
Black, White, Silver Chrome, Green
Models
X6860
25010PN30G
Price
About 250 EUR
$ 693.75 / £ 1,295.00 / € 812.34
SAR EU
—
1.00 W/kg (head) 1.00 W/kg (body)
Network 7 specs
Technology
GSM / HSPA / LTE
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International
Speed
HSPA, LTE
HSPA, LTE, 5G
—
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China
5G bands
—
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Platform 4 specs
CPU
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Mali-G57 MC2
Adreno 830
OS
Android 14, up to 2 major Android upgrades, XOS 14.5
Android 15, HyperOS 2
Chipset
Mediatek Helio G100 (6 nm)
Snapdragon 8 Elite
Selfie Camera 3 specs
Single
50 MP, f/2.5, 21mm (wide), 1/2.76", PDAF
32 MP
Features
Dual-LED flash
HDR, panorama
Video
1440p@30fps, 1080p@30/60fps
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound 3 specs
Loudspeaker
Yes, with dual speakers
Yes, with stereo speakers
3.5mm jack
No
No
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Tuned by JBL
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Qualcomm XPAN (24-bit/96kHz audio)
Eu Label 4 specs
Energy
—
Class A
Battery
—
58:58h endurance, 1000 cycles
Free fall
—
Class C (90 falls)
Repairability
—
Class C
Our Tests 2 specs
Loudspeaker
—
-24.1 LUFS (Very good)
Battery
—
Active use score 16:13h
Similar Comparisons
Common Questions
Which phone is the best in this comparison?
Infinix Zero 40 4G has the bigger display.
How are the comparison winners decided?
We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".
Which is more affordable?
The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.