Cat S53 vs Xiaomi Redmi K40S

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66

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

5G band 1, 41, 77, 78, 79 SA/NSA

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

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE, 600 Mbps download, 150 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, TPU, polycarbonate

Glass front (Gorilla Glass 5), plastic back
SIM

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

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

171 mm

163.2 mm
Width

81 mm

76 mm
Thickness

16 mm

7.7 mm
Weight

320 g

195 g
Waterproof

IP68/IP69 (1.5m and 35 minutes)

-
Splash resistant

-

Yes
Dust proof

IP68/IP69

-
Resistance drop

1.8m

-
MIL-STD-810H

Yes

-
Flashlight

Yes

-
Colors

Black

Black, Blue, Gray, Green

Display
Display type

IPS LCD

AMOLED
Physical size

6.5 inches

6.67 inches
Resolution

720 x 1600 pixels

1080 x 2400 pixels
Pixel density

270 ppi

395 ppi
Display colors

-

16777216
Protection

Scratch resistant

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

-

120Hz, HDR10+, 1300 nits (peak)

Hardware
CPU

Octa-core

Octa-core
CPU

Dual-core 2.0 GHz Kryo 460

Single-core 3.2 GHz Kryo 585
CPU(second)

Hexa-core 1.8 GHz Kryo 460

Triple-core 2.42 GHz Kryo 585
CPU(third)

Quad-core 1.80 GHz Kryo 585
Chipset

Qualcomm SM4350 Snapdragon 480 5G

Qualcomm SM8250-AC Snapdragon 870 5G
GPU

Adreno 619

Adreno 650
Internal storage

128 GB

128, 256 GB
Memory RAM

6 GB

6, 8, 12 GB
Memory card

microSD, microSDHC, microSDXC

No
Storage

-

UFS 3.1

Main camera
Camera type

Dual

Triple
Main camera

(wide) , 48 MP, f/1.8 , 1/2.0" , 0.8 µm

(wide) , 48 MP, f/1.8 , 1/2" , 0.8 µm
(macro) , 2 MP, 1.75 µm

(ultrawide) , 8 MP, 119˚
(macro) , 2 MP, f/2.4
Primary camera resolution

8000 x 6000 pixels

8000 x 6000 pixels
Primary camera video

1080p@30fps

4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS
Primary camera flash

LED flash

dual-LED dual-tone flash
Camera features

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

Autofocus, continuous shooting, digital zoom, optical 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

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
USB

Type-C 3.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.1

v5.2
Bluetooth A2DP

A2DP

Yes
bluetooth LE

LE

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes
QZSS

-

Yes
NavIC

-

Yes