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Model

Compare Cat S31 and Xiaomi Redmi 8A

Cat S31 vs Xiaomi Redmi 8A

Cat S31

Xiaomi Redmi 8A

Xiaomi Redmi 8A

Cat S31

Xiaomi Redmi 8A

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1900, 2100 - EU; HSDPA 850, 900, 1700(AWS), 1900, 2100 - USA

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800) - EU; LTE frequency band 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700) - USA

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300) - global version; LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) - India; LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China
LTE speed

LTE, Cat4, 150 Mbps download, 50 Mbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Availability
Oficially announced

2017-9

2019-9
Status

2017-10

2019-9

Design
Build

-

Front glass, plastic body
SIM

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

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

146 mm

156.5 mm
Width

74.4 mm

75.4 mm
Thickness

12.6 mm

9.4 mm
Weight

200 g

188 g
Waterproof

IP68, 1.2 m and 35 minutes

-
Splash resistant

-

Yes
Dust proof

IP68

-
MIL-STD-810G

Yes - dust, humidity, rain, salt, vibration, solar radiation, transport and thermal shock resistant

-
Colors

Black

Black, Blue, Red

Display
Display type

TFT capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

4.7 inches

6.2 inches
Resolution

720 x 1280 pixels

720 x 1520 pixels
Pixel density

312 ppi

271 ppi
Display colors

-

16777216
Protection

Corning Gorilla Glass 3

Corning Gorilla Glass 5
Multitouch

Yes

Yes

Hardware
CPU

-

Octa-core
CPU

Quad-core 1.3 GHz ARM Cortex-A7

Dual-core 1.95 GHz Cortex-A53
CPU(second)

Hexa-core 1.45 GHz Cortex-A53
Chipset

Qualcomm MSM8909 Snapdragon 210

Qualcomm SDM439 Snapdragon 439
GPU

Adreno 304

Adreno 505
Memory RAM

2 GB

2, 3 GB
Internal storage

16 GB

32 GB
Memory card

microSD

microSD, microSDHC, microSDXC
Memory card max

64 GB

512 GB
Storage

-

UFS 2.1

OS
OS

Android 7.0 (Nougat)

MIUI 10 (Android 9.0 Pie)

Main camera
Camera type

-

Single
Main camera

8 MP

12 MP, f/1.8 , 1/2.55" , 1.4 µm
Primary camera video

720p@30fps

1080p@30fps
Primary camera Autofocus

autofocus

-
Primary camera flash

LED flash

LED flash
Camera features

Geo-tagging, face detection, touch focus

HDR

Selfie camera
Selfie camera

2 MP

8 MP, f/2.0 , 1.12 µm
Selfie camera video

-

1080p@30fps

Sound
3.5mm jack

Yes

Yes
Loudspeaker

Yes

Yes
Notifications

Vibration; MP3, WAV ringtones

-
Earpiece

-

Yes

Multimedia
Radio

-

FM Radio
Radio FM

FM radio

-

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

Wi-Fi 802.11b, 802.11g, 802.11n
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
USB

microUSB 2.0

Type-C reversible connector
USB On-The-Go

Yes

Yes
Bluetooth

v4.1

v4.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
Beidou

-

Yes
BDS

Yes

-

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Email

Push Email

-
Java

No

-
Sensors

Accelerometer, compass, proximity

Accelerometer, compass, proximity

Browser
HTML

HTML5

HTML5

Battery
Battery type

Li-Ion

Li-Po
Battery capacity

4000 mAh

5000 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

-

Yes

Cost
Price

-

110 USD

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