Xiaomi Redmi K40S vs Redmi K40 Pro+: The Ultimate Showdown

Xiaomi's Redmi series consistently delivers impressive value, and the K40S and K40 Pro+ are no exception. Both offer flagship-level features at competitive prices, but key differences exist. This comprehensive comparison will help you decide which phone best suits your needs.

Phones Images

🏆 Quick Verdict

The Redmi K40 Pro+ boasts the superior Snapdragon 888 chipset and a faster charging speed, but the K40S offers excellent performance at a lower price point. For those prioritizing raw power and charging, the Pro+ wins; for budget-conscious buyers, the K40S is a fantastic choice.

PHONES
Phone Names	Xiaomi Redmi K40S	Xiaomi Redmi K40 Pro+

Network
2G bands	GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands	1, 2, 3, 4, 5, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42	1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42
5G bands	1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA	1, 3, 28, 41, 77, 78 SA/NSA/Sub6
Speed	HSPA, LTE, 5G	HSPA, LTE-A, 5G
Technology	GSM / CDMA / HSPA / CDMA2000 / LTE / 5G	GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
	CDMA2000 1x	CDMA2000 1x

Launch
Announced	2022, March 17	2021, February 25
Status	Available. Released 2022, March 17	Available. Released 2021, March 04

Body
Build	Glass front (Gorilla Glass 5), plastic back	-
Dimensions	163.2 x 76 x 7.7 mm (6.43 x 2.99 x 0.30 in)	163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)
SIM	Nano-SIM + Nano-SIM	Dual SIM (Nano-SIM, dual stand-by)
Weight	195 g (6.88 oz)	196 g (6.91 oz)
	Splash resistant	IP53, dust and splash resistant

Display
Protection	Corning Gorilla Glass 5	Corning Gorilla Glass 5
Resolution	1080 x 2400 pixels, 20:9 ratio (~395 ppi density)	1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Size	6.67 inches, 107.4 cm2 (~86.6% screen-to-body ratio)	6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Type	AMOLED, 120Hz, HDR10+, 1300 nits (peak)	Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)

Platform
CPU	Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)	Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
Chipset	Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)	Qualcomm SM8350 Snapdragon 888 5G (5 nm)
GPU	Adreno 650	Adreno 660
OS	Android 12, MIUI 13	Android 11, MIUI 12

Memory
Card slot	No	No
Internal	128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM	256GB 12GB RAM
	UFS 3.1	UFS 3.1

Main Camera
Features	Color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama	LED flash, HDR, panorama
Single	20 MP, (wide)	20 MP, f/2.5, (wide), 1/3.4", 0.8µm
Triple	48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF, OIS 8 MP, 119˚ (ultrawide) 2 MP (macro)	108 MP, f/1.8, 26mm (wide), 1/1.52", 0.7µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide) 5 MP, f/2.4, 50mm (macro), 1/5.0", 1.12µm
Video	4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS	8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, HDR10+

Selfie camera
Features	-	HDR
Single	20 MP, (wide)	20 MP, f/2.5, (wide), 1/3.4", 0.8µm
Video	1080p@30/120fps	1080p@30fps, 720p@120fps

Sound
3.5mm jack	No	No
35mm jack	No	-
Loudspeaker	Yes, with stereo speakers	Yes, with stereo speakers
	24-bit/192kHz audio	24-bit/192kHz audio

Comms
Bluetooth	5.2, A2DP, LE	5.2, A2DP, LE
Infrared port	-	Yes
NFC	Yes	Yes
Positioning	GPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)	GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)
Radio	No	No
USB	USB Type-C 2.0, OTG	USB Type-C 2.0, OTG
WLAN	Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct	Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct

Features
Sensors	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum, barometer

Battery
Charging	67W wired, PD3.0, QC3, 100% in 38 min	33W wired, PD3.0, QC3, 100% in 52 min (advertised)
Type	Li-Po 4500 mAh	Li-Po 4520 mAh, non-removable

Misc
Colors	Black, Gray, Blue, Green	Black, White, Aurora
Price	About 260 EUR	About 470 EUR

Xiaomi Redmi K40S

Excellent value for money
Fast 67W charging
Powerful Snapdragon 870 chipset
Vibrant AMOLED display
Good camera system

Slightly older chipset compared to Pro+
33W charging on Pro+ is faster
May lack some of the Pro+'s premium features

Xiaomi Redmi K40 Pro+

Flagship Snapdragon 888 chipset
Potentially better camera performance
Slightly better display (potentially)
Premium build quality (potentially)

Slower 33W charging
Higher price point
Snapdragon 888 can run hotter under sustained load

Display Comparison

Both phones feature a 6.67-inch AMOLED display with a 120Hz refresh rate, offering vibrant colors and smooth scrolling. The K40 Pro+ *may* have slightly better color accuracy and brightness due to potential panel variations, but the difference is likely minimal for most users. Resolution is generally FHD+ on both.

Camera Comparison

The K40 Pro+ typically features a higher resolution primary sensor (108MP vs. 48MP on the K40S) and potentially improved image processing. Both phones offer a versatile camera system with ultrawide and macro lenses. Low-light performance and video recording quality are generally good on both, but the Pro+ *could* have a slight advantage.

Performance

The Snapdragon 888 in the K40 Pro+ holds a performance edge over the Snapdragon 870 in the K40S. While the 870 is still incredibly capable, the 888 offers better multi-core performance and handles demanding tasks with slightly more ease. Expect slightly better gaming performance on the Pro+.

Battery Life

The K40S shines with its 67W fast charging, allowing for a full charge in around 38 minutes. The K40 Pro+'s 33W charging is slower, taking approximately 52 minutes to reach 100%. Battery capacity is similar (around 4500mAh) on both devices, so charging speed is the key differentiator.

Buying Guide

The Xiaomi Redmi K40S is ideal for users seeking a high-performance phone without breaking the bank. It's perfect for gaming, multitasking, and everyday use. The Xiaomi Redmi K40 Pro+ is best for power users who demand the absolute best performance, faster charging, and potentially a slightly better camera experience (depending on software optimization).

Frequently Asked Questions

❓ Is the Snapdragon 870 good enough for gaming?

Yes, the Snapdragon 870 is a very capable chipset for gaming. It can handle most games at high settings without significant issues. The 888 in the Pro+ offers a slight edge, but the 870 is still excellent.

❓ Which phone has better battery life?

Both phones have similar battery capacities, but the K40S's faster charging makes it more convenient. Real-world battery life will likely be comparable.