Screen size
Redmi K40 Pro+6.7"
Redmi Note 15 SpecialWinner: 6.8"+1.5%
Quick verdict
Redmi K40 Pro+ leads the measured specs 9-8.
Measured wins
Redmi K40 Pro+
9
spec wins
Overall winner
Ties
6
equal specs
Redmi Note 15 Special
8
spec wins
Screen size
Technology
Redmi K40 Pro+
GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
Redmi Note 15 Special
GSM / HSPA / LTE / 5G
2G bands
Redmi K40 Pro+
GSM 850 / 900 / 1800 / 1900 , CDMA 800
Redmi Note 15 Special
GSM 850 / 900 / 1800 / 1900
3G bands
Redmi K40 Pro+
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1x
Redmi Note 15 Special
HSDPA 850 / 900 / 2100
4G bands
Redmi K40 Pro+
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
Stereo speakers
equal specs1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42
Redmi Note 15 Special
1, 3, 5, 8, 28, 40, 41
5G bands
Redmi K40 Pro+
1, 3, 28, 41, 77, 78 SA/NSA/Sub6
Redmi Note 15 Special
1, 3, 5, 8, 28, 40, 78 SA/NSA
Speed
Redmi K40 Pro+
HSPA, LTE, 5G
Redmi Note 15 Special
HSPA, LTE, 5G
Announced
Redmi K40 Pro+
2021, February 25
Redmi Note 15 Special
2026, April 02
Status
Redmi K40 Pro+
Available. Released 2021, March 04
Redmi Note 15 Special
Released Apr 7, 2026
Dimensions
Redmi K40 Pro+
163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)
Redmi Note 15 Special
164.0 x 75.4 x 7.4 mm or 7.8 mm
Weight
Redmi K40 Pro+
196 g (6.91 oz)
Redmi Note 15 Special
178 g or 182 g (6.28 oz)
SIM
Redmi K40 Pro+
Nano-SIM + Nano-SIM
Redmi Note 15 Special
Nano-SIM + Nano-SIM
Other
Redmi K40 Pro+
IP53 dust protected and water resistant (vertical water sprays)
Redmi Note 15 Special
Drop resistant up to 1.7m MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions IP66 dust tight and water resistant (high pressure water jets)
Type
Redmi K40 Pro+
Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)
Redmi Note 15 Special
AMOLED, 68B colors, 120Hz, 3840Hz PWM, 800 nits (typ), 3200 nits (peak)
Size
Redmi K40 Pro+
6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Redmi Note 15 Special
6.77 inches, 110.9 cm2 (~89.7% screen-to-body ratio)
Resolution
Redmi K40 Pro+
1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Redmi Note 15 Special
1080 x 2392 pixels (~388 ppi density)
Protection
Redmi K40 Pro+
Corning Gorilla Glass 5
Redmi Note 15 Special
-
OS
Redmi K40 Pro+
Android 11, MIUI 12
Redmi Note 15 Special
Android 15, up to 4 major Android upgrades, HyperOS 2
Chipset
Redmi K40 Pro+
Qualcomm SM8350 Snapdragon 888 5G (5 nm)
Redmi Note 15 Special
Qualcomm SM6475-AB Snapdragon 6 Gen 3 (4 nm)
CPU
Redmi K40 Pro+
Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
Redmi Note 15 Special
Octa-core (4x2.4 GHz Cortex-A78 & 4x1.8 GHz Cortex-A55)
GPU
Redmi K40 Pro+
Adreno 660
Redmi Note 15 Special
Adreno 710
Card slot
Redmi K40 Pro+
No
Redmi Note 15 Special
microSDXC (uses shared SIM slot)
Internal
Redmi K40 Pro+
256GB 12GB RAM
Redmi Note 15 Special
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Other
Redmi K40 Pro+
UFS 3.1
Redmi Note 15 Special
UFS 2.2
Triple
Redmi K40 Pro+
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)
Redmi Note 15 Special
-
Features
Redmi K40 Pro+
Color spectrum sensor, LED flash, HDR, panorama
Redmi Note 15 Special
LED flash, HDR, panorama
Video
Redmi K40 Pro+
8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, HDR10+
Redmi Note 15 Special
4K@30fps, 1080p@30fps, gyro-EIS
Dual
Redmi K40 Pro+
-
Redmi Note 15 Special
50 MP, f/1.8, (wide), 1/2.88", 0.61µm, PDAF Auxiliary lens
Single
Redmi K40 Pro+
20 MP, f/2.5, (wide), 1/3.4", 0.8µm
Redmi Note 15 Special
20 MP, f/2.2, (wide), 1/4"
Features
Redmi K40 Pro+
HDR
Redmi Note 15 Special
-
Video
Redmi K40 Pro+
1080p@30fps, 720p@120fps
Redmi Note 15 Special
1080p@30fps
Loudspeaker
Redmi K40 Pro+
Yes, with stereo speakers
Redmi Note 15 Special
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
Redmi K40 Pro+
No
Redmi Note 15 Special
No
Other
Redmi K40 Pro+
24-bit/192kHz Hi-Res audio
Redmi Note 15 Special
24-bit/192kHz Hi-Res audio
WLAN
Redmi K40 Pro+
Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct
Redmi Note 15 Special
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
Redmi K40 Pro+
5.2, A2DP, LE
Redmi Note 15 Special
5.1, A2DP, LE
Positioning
Redmi K40 Pro+
GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)
Redmi Note 15 Special
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
Redmi K40 Pro+
Yes
Redmi Note 15 Special
No
Infrared port
Redmi K40 Pro+
Yes
Redmi Note 15 Special
Yes
Radio
Redmi K40 Pro+
No
Redmi Note 15 Special
No
USB
Redmi K40 Pro+
USB Type-C 2.0, OTG
Redmi Note 15 Special
USB Type-C 2.0, OTG
Sensors
Redmi K40 Pro+
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Redmi Note 15 Special
Fingerprint (under display, optical), accelerometer, gyro, compass
Other
Redmi K40 Pro+
-
Redmi Note 15 Special
Virtual proximity sensing
Type
Redmi K40 Pro+
Li-Po 4520 mAh
Redmi Note 15 Special
Li-Ion 5800 mAh
Charging
Redmi K40 Pro+
33W wired, PD3.0, QC3, 100% in 52 min
Redmi Note 15 Special
45W wired 18W reverse wired
Colors
Redmi K40 Pro+
Black, White, Aurora
Redmi Note 15 Special
Crimson Reserve red, Carbon Black, Frosted White
Price
Redmi K40 Pro+
About 470 EUR
Redmi Note 15 Special
About 190 EUR