Cat S31 vs Realme 3

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, 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), 3(1800), 5(850), 7(2600), 8(900), 20(800), 28(700), 38(2600), 40(2300), 41(2500); LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 40(2300), 41(2500)
HSDPA speed

-

42.2 Mbps
HSUPA speed

-

5.76 Mbps
LTE speed

LTE, Cat4, 150 Mbps download, 50 Mbps upload

LTE-A (2CA), Cat12, 600 Mbps download, 50 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

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

156.1 mm
Width

74.4 mm

75.6 mm
Thickness

12.6 mm

8.3 mm
Weight

200 g

175 g
Waterproof

IP68, 1.2 m and 35 minutes

-
Dust proof

IP68

-
MIL-STD-810G

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

-
Colors

Black

Black, Blue

Display
Display type

TFT capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

4.7 inches

6.22 inches
Resolution

720 x 1280 pixels

720 x 1520 pixels
Pixel density

312 ppi

270 ppi
Display colors

-

16777216
Protection

Corning Gorilla Glass 3

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3, LTPS(Low temperature PolySilicon)
Multitouch

Yes

Yes

Hardware
CPU

-

Octa-core
CPU

Quad-core 1.3 GHz ARM Cortex-A7

Quad-core 2.0 GHz Cortex-A73
CPU(second)

quad-core 2.0 GHz Cortex-A53
Chipset

Qualcomm MSM8909 Snapdragon 210

Mediatek MT6771 Helio P60 / Mediatek Helio P70
GPU

Adreno 304

Mali-G72 MP3
Memory RAM

2 GB

3, 4 GB
Internal storage

16 GB

32, 64 GB
Memory card

microSD

microSD, microSDHC, microSDXC
Memory card max

64 GB

256 GB

Main camera
Camera type

-

Dual
Main camera

8 MP

13 MP, f/1.8 , 1/3" , 1.12 µm
2 MP
Primary camera resolution

-

4160 x 3120 pixels
Primary camera video

720p@30fps

1080p@30fps
Primary camera Autofocus

autofocus

-
Primary camera flash

LED flash

LED flash
Primary camera phase detection autofocus

-

phase detection autofocus
Camera features

Geo-tagging, face detection, touch focus

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

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, fingerprint, proximity