Screen size
Redmi K406.7"
Redmi Note 15 SpecialWinner: 6.8"+1.5%
Quick verdict
Redmi Note 15 Special leads the measured specs 10-5.
Measured wins
Redmi K40
5
spec wins
Ties
8
equal specs
Redmi Note 15 Special
10
spec wins
Overall winner
Screen size
Technology
Redmi K40
GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
Redmi Note 15 Special
GSM / HSPA / LTE / 5G
2G bands
Redmi K40
GSM 850 / 900 / 1800 / 1900 , CDMA 800
Redmi Note 15 Special
GSM 850 / 900 / 1800 / 1900
3G bands
Redmi K40
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1x
Redmi Note 15 Special
HSDPA 850 / 900 / 2100
4G bands
Redmi K40
1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain 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 specsRedmi Note 15 Special
1, 3, 5, 8, 28, 40, 41
5G bands
Redmi K40
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
HSPA, LTE, 5G
Redmi Note 15 Special
HSPA, LTE, 5G
Announced
Redmi K40
2021, February 25
Redmi Note 15 Special
2026, April 02
Status
Redmi K40
Available. Released 2021, March 04
Redmi Note 15 Special
Released Apr 7, 2026
Dimensions
Redmi K40
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
196 g (6.91 oz)
Redmi Note 15 Special
178 g or 182 g (6.28 oz)
SIM
Redmi K40
Nano-SIM + Nano-SIM
Redmi Note 15 Special
Nano-SIM + Nano-SIM
Other
Redmi K40
-
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
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
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
1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Redmi Note 15 Special
1080 x 2392 pixels (~388 ppi density)
Protection
Redmi K40
Corning Gorilla Glass 5
Redmi Note 15 Special
-
OS
Redmi K40
Android 11, MIUI 12
Redmi Note 15 Special
Android 15, up to 4 major Android upgrades, HyperOS 2
Chipset
Redmi K40
Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
Redmi Note 15 Special
Qualcomm SM6475-AB Snapdragon 6 Gen 3 (4 nm)
CPU
Redmi K40
Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
Redmi Note 15 Special
Octa-core (4x2.4 GHz Cortex-A78 & 4x1.8 GHz Cortex-A55)
GPU
Redmi K40
Adreno 650
Redmi Note 15 Special
Adreno 710
Card slot
Redmi K40
No
Redmi Note 15 Special
microSDXC (uses shared SIM slot)
Internal
Redmi K40
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
Redmi Note 15 Special
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Other
Redmi K40
UFS 3.1
Redmi Note 15 Special
UFS 2.2
Triple
Redmi K40
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide) 5 MP, f/2.4, 50mm (macro)
Redmi Note 15 Special
-
Features
Redmi K40
Color spectrum sensor, LED flash, HDR, panorama
Redmi Note 15 Special
LED flash, HDR, panorama
Video
Redmi K40
4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS
Redmi Note 15 Special
4K@30fps, 1080p@30fps, gyro-EIS
Dual
Redmi K40
-
Redmi Note 15 Special
50 MP, f/1.8, (wide), 1/2.88", 0.61µm, PDAF Auxiliary lens
Single
Redmi K40
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
HDR
Redmi Note 15 Special
-
Video
Redmi K40
1080p@30fps, 720p@120fps
Redmi Note 15 Special
1080p@30fps
Loudspeaker
Redmi K40
Yes, with stereo speakers
Redmi Note 15 Special
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
Redmi K40
No
Redmi Note 15 Special
No
Other
Redmi K40
24-bit/192kHz Hi-Res audio
Redmi Note 15 Special
24-bit/192kHz Hi-Res audio
WLAN
Redmi K40
Wi-Fi 802.11 a/b/g/n/ac/6, 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
5.1, A2DP, LE
Redmi Note 15 Special
5.1, A2DP, LE
Positioning
Redmi K40
GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC
Redmi Note 15 Special
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
Redmi K40
Yes
Redmi Note 15 Special
No
Infrared port
Redmi K40
Yes
Redmi Note 15 Special
Yes
Radio
Redmi K40
No
Redmi Note 15 Special
No
USB
Redmi K40
USB Type-C 2.0, OTG
Redmi Note 15 Special
USB Type-C 2.0, OTG
Sensors
Redmi K40
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Redmi Note 15 Special
Fingerprint (under display, optical), accelerometer, gyro, compass
Other
Redmi K40
-
Redmi Note 15 Special
Virtual proximity sensing
Type
Redmi K40
Li-Po 4520 mAh
Redmi Note 15 Special
Li-Ion 5800 mAh
Charging
Redmi K40
33W wired, PD3.0, QC3, 100% in 52 min
Redmi Note 15 Special
45W wired 18W reverse wired
Colors
Redmi K40
Black, White, Aurora
Redmi Note 15 Special
Crimson Reserve red, Carbon Black, Frosted White
Models
Redmi K40
M2012K11AC
Redmi Note 15 Special
-
Price
Redmi K40
About 280 EUR
Redmi Note 15 Special
About 190 EUR