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Infinix Note 40S
Infinix Infinix Note 40S
2.7
Price TBA
View Details
★ Our Pick
Xiaomi 15 Ultra
Xiaomi Xiaomi 15 Ultra
512GB · 16GB RAM
4.3
From $1,099
View Details

Our Verdict

Analysis

Infinix Note 40S has the bigger display.

Overall Winner
Infinix Note 40S
Display Winner
Infinix Note 40S
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie

Specifications Comparison

Feature Infinix Note 40S Xiaomi 15 Ultra
Display size (in) 6.78 6.73
Charging (W) 33 90
Main camera (MP) 108.00 50.00
Weight (g) 176 226
Thickness (mm) 7.80 9.35
Chipset Mediatek Helio G99 Ultimate Snapdragon 8 Elite
OS Android 14, up to 2 major Android upgrades, XOS 14 Android 15, HyperOS 2

Pros & Cons

Infinix Note 40S

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 Note 40S
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
33W wired, 50% in 31 min 20W wireless MagCharge Reverse wired Reverse wireless Bypass charging
90W wired, 80W wireless
Capacity
5410 mAh
Body 5 specs
Dimensions
164.1 x 74.6 x 7.8 mm (6.46 x 2.94 x 0.31 in)
161.3 x 75.3 x 9.35 mm
Weight
176 g (6.21 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 (market/region dependent)
Yes
Radio
FM radio
No
USB
USB Type-C 2.0, OTG
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
Yes
5G
Yes
Display 4 specs
Type
AMOLED, 1B colors, 120Hz, 550 nits (typ), 1300 nits (peak)
LTPO AMOLED
Size
6.78 inches, 109.9 cm2 (~89.8% screen-to-body ratio)
6.73 inches
Resolution
1080 x 2436 pixels (~393 ppi density)
1440 x 3200 pixels
Protection
Corning Gorilla Glass
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, September
2025, February 27
Status
Available. Released 2024, October
Available. Released 2025, February 27
Main Camera 4 specs
Triple
108 MP, f/1.9, 24mm (wide), 1/1.52", PDAF 2 MP (macro) 3rd unspecified camera
Features
Quad-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
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
Unspecified
No
Internal
256GB 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
Obsidian Black, Vintage Green
Black, White, Silver Chrome, Green
Models
X6850B
25010PN30G
SAR EU
1.00 W/kg (head)     1.00 W/kg (body)    
Price
$ 693.75 / £ 1,295.00 / € 812.34
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
OS
Android 14, up to 2 major Android upgrades, XOS 14
Android 15, HyperOS 2
Chipset
Mediatek Helio G99 Ultimate
Snapdragon 8 Elite
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
Selfie Camera 3 specs
Single
32 MP, f/2.2, (wide), 1/3.1"
32 MP
Features
Dual-LED flash
HDR, panorama
Video
1080p@30fps
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound 3 specs
Loudspeaker
Yes, with stereo speakers
Yes, with stereo speakers
3.5mm jack
No
No
 
Tuned by JBL 24-bit/192kHz Hi-Res audio
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

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Common Questions

Which phone is the best in this comparison?

Infinix Note 40S 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.