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

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

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

Infinix Note 40X alternatives

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Xiaomi 15 alternatives

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Samsung Galaxy S23 Ultra

Apple iPhone 15

Samsung Galaxy S24+

Samsung Galaxy S25

Apple iPhone 16 Pro Max

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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

Snapdragon 8 Elite
3 nm
5240 mAh
90W
6.36"
1200 x 2670 pixels
50 MP
8K@24/30fps
Specs

Xiaomi 15

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, Circle to Search, AI Write, AI translate, AI Erase Pro, AI Summary and more

Body

Dimensions

168.9 x 76.5 x 8.3 mm

152.3 x 71.2 x 8.1 mm

Thickness

8.3 mm

8.1 mm

Weight

201 g

189 g

Build Details

Aluminum Alloy 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

6.36 inches

Type

AMOLED

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

Refresh Rate

120 Hz

Peak Brightness

500 nits

3200 nits

Resolution

1080x2460 pixels

1200 x 2670 pixels

Pixel Density

396 ppi

460 ppi

Aspect Ratio

20:9

Screen to Body Ratio

84.5 %

90.0 %

Performance

Chipset¹

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 512GB (UFS 4.0)

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), 1/1.31", 1.2µm, OmniVision Light Fusion 900, dual pixel PDAF, OIS

50 MP
f/2.0, 60mm (telephoto), 1/2.76", 0.64µm, S5KJN5, PDAF (10cm - ∞), OIS, 2.6x optical zoom

50 MP
f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm, Samsung S5KJN1

OIS

Yes

Features

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

Laser AF, color spectrum sensor, Leica lens, Dual-LED dual-tone flash, HDR, panorama

Video Recording

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

8K@24/30fps
4K@24/30/60fps
1080p@30/60/120/240/960fps
720p@1920fps

Video Recording Features

Dual Video Recording, Short Video Mode

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

19 5G Bands

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

SIM 2

10 5G Bands

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

19 5G Bands

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

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

Wi-Fi Direct, Mobile Hotspot

USB

USB Type-C 2.0, OTG

USB Type-C 3.2 Gen2, Display Port, OTG

Bluetooth

5.3

5.4

NFC

Yes

GPS

Yes with A-GPS

Yes with A-GPS, Glonass

Infrared

Yes

UWB (Ultra Wideband)

Battery

Capacity

5000 mAh

5240 mAh

Type

Li-Polymer

Si/C Li-Ion

Removable

Wired charging

18W

90W

Charging Speed

50% in 31 min

Wireless Charging

50W

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

Colors and Pricing

Colors

Palm Blue, Lime Green, Starlit Black

Black, White and Green

Price in India

₹19000

₹64998

FAQs

Which phone has better performance?

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

Which phone offers longer software support?

Xiaomi 15 offers 4 years of OS updates, whereas Infinix Note 40X provides 2 years. For security updates, Xiaomi 15 offers 6 years of support compared to Infinix Note 40X's 3 years.

Which phone has a better display?

Both Infinix Note 40X and Xiaomi 15 feature AMOLED displays, offering vibrant colors and deeper blacks. Both smartphones offer the same 120 Hz refresh rate. Xiaomi 15 also boasts a brighter screen with 3200 nits of peak brightness, enhancing outdoor visibility. Notably, Xiaomi 15 offers a higher screen resolution, resulting in sharper visuals and more detailed content.

Which phone has a bigger battery and faster charging?

Xiaomi 15 features a larger 5240 mAh battery, potentially delivering better battery life. Xiaomi 15 also supports faster wired charging at 90W, compared to 18W on Infinix Note 40X. Xiaomi 15 supports wireless charging at 50W, while Infinix Note 40X lacks this feature.

Which phone has better water and dust resistance?

Xiaomi 15 offers better protection against water and dust with an IP68 rating.

Can I buy these phones on Amazon?

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

¹ Scores can vary even with the same chipset due to RAM, thermals, and software optimization.