Infinix Note 40X vs Xiaomi 15 Ultra – Price, Specs & Features

Q: Which phone has better performance, the Infinix Note 40X or the Xiaomi 15 Ultra?

In this comparison, the Xiaomi 15 Ultra with the Snapdragon 8 Elite (3 nm) performs better than the Infinix Note 40X with the Dimensity 6300 (6 nm), thanks to its more efficient chipset.

Infinix Note 40X alternatives

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Xiaomi 15 Ultra alternatives

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Infinix Note 40X

Dimensity 6300
6 nm
5000 mAh
18W
6.78"
1080x2460 pixels
108 MP
1440p@30fps
Specs

Xiaomi 15 Ultra

Snapdragon 8 Elite
3 nm
5410 mAh
90W
6.73"
1440 x 3200 pixels
50 MP
8K@30fps
Specs

Xiaomi 15 Ultra

General

Launch Date

August 05, 2024

March 11, 2025

Availability

Available Now

Android 14

Android 15

Custom UI

XOS 14

HyperOS 2

OS Updates

2 Years

4 Years

Security Updates

3 Years

6 Years

AI Features

HyperAI, AI Write, AI Summary and more

Body

Dimensions

168.9 x 76.5 x 8.3 mm

161.3 x 75.3 x 9.4 mm

Thickness

8.3 mm

9.4 mm

Weight

201 g

226 g

Build Details

Glass-fiber Back Or Vegan Leather, Aluminum Frame

IP Rating

IP52 (dust and splash resistant)

IP68 (dust tight and water resistant (immersible up to 1.5m for 30 min))

Display

Size

6.78 inches

6.73 inches

Type

AMOLED

LTPO AMOLED, 68B colors, Dolby Vision, HDR10+, HDR Vivid

Refresh Rate

120 Hz

Peak Brightness

500 nits

3200 nits

Resolution

1080x2460 pixels

1440 x 3200 pixels

Pixel Density

396 ppi

522 ppi

Aspect Ratio

20:9

Screen to Body Ratio

84.5 %

89.7 %

Performance

Chipset

Mediatek Dimensity 6300

Qualcomm Snapdragon 8 Elite

Process Size

6 nm

3 nm

CPU

Octa-core
2x2.4 GHz Cortex-A76
6x Cortex-A55

Octa-core
2x4.32 GHz Oryon V2 Phoenix L
6x3.53 GHz Oryon V2 Phoenix M

GPU

Mali-G57 MC2

Adreno 830

RAM & Storage

8GB 256GB (UFS 2.2)
12GB 256GB (UFS 2.2)

12GB 256GB (UFS 4.1)
16GB 512GB (UFS 4.1)
16GB 1024GB (UFS 4.1)

RAM Type

LPDDR4X

LPDDR5X

Expandable Memory

Yes

Camera

Main Camera

108 MP
f/1.8, (wide), PDAF

2 MP
macro

2 MP

50 MP
f/1.6, 23mm (wide), 1.0"-type, 1.6µm, Sony LYT-900, dual pixel PDAF, OIS

50 MP
f/1.8, 70mm (telephoto), 1/2.51", 0.7µm, Sony IMX858, dual pixel PDAF (10cm - ∞), OIS, 3x optical zoom

200 MP
f/2.6, 100mm (periscope telephoto), 1/1.4", 0.56µm, Samsung S5KHP9, multi-directional PDAF, OIS, 4.3x optical zoom

50 MP
f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm, Samsung S5KJN5, dual pixel PDAF
TOF 3D, (depth)

OIS

Yes

Features

Quad-LED flash, HDR, panorama, Digital Zoom, Auto Flash, Face detection

Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)

Video Recording

1440p@30fps
1080p@30/60fps

8K@30fps
4K@30/60/120fps
1080p@30/60/120/240/480/960/1920fps

Video Recording Features

Dual Video Recording, Short Video Mode

gyro-EIS, Dolby Vision HDR 10-bit recording (4K@60fps, 1080p)

Selfie Camera

8 MP
wide

32 MP
f/2.0, 21mm (wide), 1/3.14", 0.7µm, OmniVision OV32B40

Selfie Features

Dual-LED flash

HDR, panorama

Selfie Video Recording

1080p@30fps

4K@30/60fps
1080p@30/60fps

Connectivity

SIM

Dual SIM, GSM+GSM
SIM1: Nano, SIM2: Nano

Dual SIM
SIM1: Nano, SIM2: Nano

SIM 1

10 5G Bands

FDD: N1, N3, N5, N8, N28
TDD: N38, N40, N41, N77, N78

21 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28
TDD: N38, N40, N41, N48, N66, N71, N75, N77, N78, N79

SIM 2

10 5G Bands

FDD: N1, N3, N5, N8, N28
TDD: N38, N40, N41, N77, N78

21 5G Bands

FDD: N1, N2, N3, N5, N7, N8, N12, N20, N25, N26, N28
TDD: N38, N40, N41, N48, N66, N71, N75, N77, N78, N79

VoLTE

Yes

Wi-Fi

Wi-Fi 5

Wi-Fi 7

Wi-Fi Details

802.11 a/b/g/n/ac 5GHz

802.11 a/b/g/n/ac/be/ax 5GHz 6GHz, MIMO

Wi-Fi Features

Mobile Hotspot

USB

USB Type-C 2.0, OTG

USB Type-C 3.2 Gen 2, DisplayPort, OTG

Bluetooth

5.3

6.0

NFC

Yes

GPS

Yes with A-GPS

Yes with A-GPS, Glonass

Infrared

Yes

UWB (Ultra Wideband)

Battery

Capacity

5000 mAh

5410 mAh

Type

Li-Polymer

Si/C Li-Ion

Removable

Wired charging

18W

90W

Charging Speed

50% in 31 min

Wireless Charging

80W

Reverse Wireless Charging

10W

Charger in the Box

Yes

Sound

Stereo Speakers

Yes

3.5mm Headphone Jack

Yes

FM Radio

Extra Features

Sensors

Fingerprint (side-mounted), accelerometer, proximity, compass

Under-display ultrasonic fingerprint sensor, accelerometer, gyroscope, proximity, compass, barometer

Others

Two-way satellite communication

Colors and Pricing

Colors

Palm Blue, Lime Green, Starlit Black

Chrome Silver

Price in India

₹19999

₹109998

FAQs

Which phone has better performance?

In this comparison, the Xiaomi 15 Ultra with the Qualcomm Snapdragon 8 Elite (3nm) performs better than the Infinix Note 40X with the Mediatek Dimensity 6300 (6nm), thanks to its more efficient chipset.

Which phone offers longer software support?

The Xiaomi 15 Ultra offers 4 years of OS updates, while the Infinix Note 40X provides 2 years. When it comes to security updates, Xiaomi 15 Ultra leads with 6 years of support.

Which phone has a better display?

Both phones feature AMOLED displays. They have the same 120 Hz refresh rate. Xiaomi 15 Ultra also has a brighter display with 3200 nits, improving outdoor visibility. Notably, Xiaomi 15 Ultra has a higher resolution display, resulting in sharper visuals.

Which phone has a bigger battery and faster charging?

Xiaomi 15 Ultra has a larger 5410 mAh battery for longer usage. Xiaomi 15 Ultra supports faster wired charging at 90W. Xiaomi 15 Ultra supports wireless charging at 80W, while Infinix Note 40X lacks this feature.

Which phone has better water and dust resistance?

Xiaomi 15 Ultra offers better water and dust resistance with an IP68 rating.

Can I buy these phones on Amazon?

Infinix Note 40X – Check price here
Xiaomi 15 Ultra – Check price here