Xiaomi 12S Ultra vs Xiaomi Redmi K40 Gaming

Network
2G network

GSM 850, 900, 1800, 1900;CDMA 800

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 26, 34, 38, 39, 40, 41, 42

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42
5G network

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78, 79 SA/NSA

5G band 1, 3, 28, 41, 77, 78 SA/NSA/Sub6
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A
GPRS

Class 33

Yes
EDGE

Class 33

Yes

Design
Build

Glass front (Gorilla Glass Victus), eco leather back, aluminum frame

Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5)
SIM

Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual stand-by)
Height

163.2 mm

161.9 mm
Width

75 mm

76.9 mm
Thickness

9.1 mm

8.3 mm
Weight

225 g

205 g
Waterproof

-

IP53
Dust proof

-

IP53
Build features

-

Physical pop-up gaming triggers
Colors

Black, Green

Black, Gray, Silver, Yellow

Display
Display type

LTPO2 AMOLED

OLED
Physical size

6.73 inches

6.67 inches
Resolution

1440 x 3200 pixels

1080 x 2400 pixels
Pixel density

522 ppi

395 ppi
Display colors

1073741824

1073741824
Protection

Scratch resistant, Corning Gorilla Glass Victus

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5
Display features

120Hz, Dolby Vision, HDR10+, 1000 nits (HBM), 1500 nits (peak)

120Hz, HDR10+, 500 nits (typ)

Main camera
Camera type

Quad

Triple
Main camera

(wide) , 50 MP, f/1.9 , 23 mm, 1.0" , 1.6 µm

(wide) , 64 MP, f/1.7 , 26 mm, 1/2" , 0.7 µm
(periscope telephoto) , 48 MP, f/4.1 , 120 mm, 1/2.0" , 0.8 µm

(ultrawide) , 8 MP, f/2.2 , 120˚
128˚ , (ultrawide) , 48 MP, f/2.2 , 13 mm, 1/2.0" , 0.8 µm

(macro) , 2 MP, f/2.4
Primary camera resolution

-

9280 x 6920 pixels
Primary camera video

8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, 720p@3840fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K, 1080p)

4K@30fps, 1080p@30/60/120fps, 720p@960fps, HDR
Primary camera optics

Leica lens

-
Primary camera flash

dual-LED flash

dual-LED flash
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, face unlock, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus, super night mode 2.0, HDR10 video recording

Autofocus, continuous shooting, digital zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
WLAN DLNA

Yes

-
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.2

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD, aptX Adaptive

-
Infrared

Yes

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with dual-band A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

Yes
NavIC

Yes

Yes

Features
Sensors

Accelerometer, barometer, color spectrum, compass, fingerprint, gyroscope, virtual proximity sensing

Accelerometer, barometer, color spectrum, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4860 mAh

5065 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

Quick Charge 4+, 67W (100% in 41 min)

Quick Charge 3+ (100% in 42 min)
Wireless reverse charging

Yes, 10W

-
Fast wireless charging

Yes, 50W (100% in 52 min)

-