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 · 1280x720px	6.3-inch · 1520x720px
Single camera	Dual camera
2GB · 16GB	2GB · 16GB
4000 mAh	4000 mAh

Availability

Officially announced
Aug 31, 2017
MSRP
$ 330

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

Display

Size
4.7-inch, 56.03% screen-to-body	6.3-inch, 81.40% screen-to-body
Type
IPS LCD	IPS LCD
Resolution
1280x720px, 312 PPI	1520x720px, 19:9 ratio, 269 PPI
Colors
16 777 216
Protection
Corning Gorilla Glass 3	Corning Gorilla Glass 5

Hardware

System chip
Snapdragon 210 8909 (28 nm)	Snapdragon 632 SDM632 (14 nm)
Processor
Quad-core 1100 MHz ARM Cortex-A7	Octa-core 1800 MHz
GPU
Adreno 304	Adreno 506
Memory
2GB/16GB	2GB/16GB (eMMC 5.1) 2GB/32GB 3GB/32GB 3GB/64GB 4GB/64GB
Storage expansion
microSDXC up to 128 GB	microSDXC
OS
Android (7.0 Nougat)	Android (10, 9.0 Pie)

Battery

Type
4000 mAh, Li - Ion	4000 mAh

Camera

Rear
Single camera	Dual camera
Main camera
8 MP (Autofocus)	12 MP 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
720p Video calling, Video sharing	1080p (30 fps)
Front
2 MP	8 MP Video capture: 1080p

Connectivity & Features

Bluetooth
4.1	4.2
WLAN
b,g,n Hotspot, Wi-Fi Direct 802.11 b, g, n	b,g,n Wi-Fi Direct, Hotspot 802.11 b, g, n
USB
microUSB, USB 2.0	microUSB, USB 2.0
Sensors
Accelerometer, Compass, Ambient light sensor, Proximity sensor	Accelerometer, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
VoIP, Tethering, Computer sync, OTA sync	Infrared

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

Cellular

4G (FDD) Bands
2, 4, 5, 7, 12, 17	1, 2, 3, 4, 5, 7, 8, 20
4G (TDD) Bands
	38, 40
3G Bands
5, 8, 4, 2, 1	1, 2, 4, 5, 8
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

Phone Features

Notifications
Haptic feedback
Other features
Voice dialing, Voice commands, Voice recording

Alternative variants

Dual SIM


Dual SIM	Yes

With 32GB internal storage


Memory	32GB

With 3GB RAM and 32GB internal storage


Memory	3GB/32GB

With 3GB RAM and 64GB internal storage


Memory	3GB/64GB

With 4GB RAM and 64GB internal storage


Memory	4GB/64GB

Links

Full specifications
CAT S31 Specs	Xiaomi Redmi 7 Specs