CAT S31 vs Xiaomi Redmi 7 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.


CAT S31	Xiaomi Redmi 7
Released · Aug 31, 2017	Released · Mar 20, 2020
4.7-inch · 1280 x 720 px	6.3-inch · 1520 x 720 px
8 MP Main · 2 MP Selfie	12 MP Main · 8 MP Selfie
2GB · 16GB	2GB · 16GB
4000 mAh	4000 mAh

Display

Size
4.7-inch	6.3-inch
Resolution
1280 x 720 px, 312 PPI	1520 x 720 px, 19:9 ratio, 269 PPI
Technology
IPS LCD	IPS LCD
Screen-to-body
56.03 %	81.40 %
Colors
16 777 216
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 210 8909 (28 nm)	Qualcomm Snapdragon 632 SDM632 (14 nm)
Processor
Quad-core, 1100 MHz, ARM Cortex-A7, 32-bit	Octa-core, 1800 MHz
GPU
Adreno 304	Adreno 506
RAM
2GB	2GB
Internal storage
16GB	16GB (eMMC 5.1)
Storage expansion
microSDXC up to 128 GB	microSDXC
OS
Android (7.0 Nougat)	Android (10, 9.0 Pie)
Device type
Smartphone	Smartphone

Battery

Capacity
4000 mAh	4000 mAh
Type
Li - Ion, Not user replaceable	Not user replaceable

Camera

Rear
Single camera	Dual camera
Main camera
8 MP (Autofocus)	12 MP Specifications: Aperture size: F2.2 Sensor size: 1/2.9" Pixel size: 1.25 μm
Second camera
	2 MP (Depth information)
Flash
LED	LED
Video recording
1280x720 (HD) Features: Video calling, Video sharing	1920x1080 (Full HD) (30 fps)
Front
2 MP	8 MP, Video capture: 1920x1080 (Full HD)

Design

Dimensions
5.75 x 2.93 x 0.50 inches (146 x 74.42 x 12.6 mm)	6.25 x 2.98 x 0.33 inches (158.7 x 75.6 x 8.5 mm)
Weight
7.05 oz(200.0 g)	6.35 oz(180.0 g)
Materials
	Back: Plastic Frame: Plastic
Resistance
Water, Dust, Shock, Vibration, Temperature; IP68; MIL-STD-810 certified
Biometrics
	Fingerprint (touch)
Features
Soft keys
Keys
Left: Lock/Unlock key; Right: Volume control	Right: Volume control, Lock/Unlock key
Colors
Black	Lunar Red, Eclipse Black, Comet Blue

Cellular

4G (FDD)
Bands 2(1900), 4(AWS-1), 5(850), 7(2600), 12(700 a), 17(700 b)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD)
4G (TDD)
	Bands 38(2600), 40(2300)
3G
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE Cat 4 (150/50 Mbit/s), HSPA, HSUPA, UMTS	LTE-A, HSDPA+ (4G) 42.2 Mbit/s
SIM type
Nano SIM	Dual Nano SIM

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM
Additional microphone(s)
	Noise cancellation

Connectivity & Features

Bluetooth
4.1	4.2
Wi-Fi
802.11 b,g,n Hotspot, Wi-Fi Direct	802.11 b,g,n Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0, Features: Mass storage device, OTG, Charging	microUSB, USB 2.0, Features: Charging, OTG
Location
GPS, A-GPS, Glonass, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Compass	Accelerometer, Compass
Other
VoIP, Tethering, Computer sync, OTA sync	Infrared

Buyers information

MSRP
$ 330

Availability

Officially announced
Aug 31, 2017

Alternative variants

Dual SIM


Dual SIM	Yes

With 32GB internal storage


Internal storage	32GB

With 3GB RAM and 32GB internal storage


RAM	3GB
Internal storage	32GB

With 3GB RAM and 64GB internal storage


RAM	3GB
Internal storage	64GB

With 4GB RAM and 64GB internal storage


RAM	4GB
Internal storage	64GB

Links

Full specifications
CAT S31 Specs	Xiaomi Redmi 7 Specs