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Model

Compare Cat S31 and Lava Z40

Cat S31 vs Lava Z40

Cat S31

Lava Z40

Cat S31

Lava Z40

Network
2G network

GSM 850, 900, 1800, 1900

GSM 900, 1800
3G network

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

HSDPA 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), 40(2300), 41(2500)
HSDPA speed

-

21.1 Mbps
HSUPA speed

-

5.76 Mbps
LTE speed

LTE, Cat4, 150 Mbps download, 50 Mbps upload

LTE, Cat4, 150 Mbps download, 51 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Availability
Status

2017-10

2019-3
Oficially announced

2017-9

2019-3

Design
Build

-

Plastic
SIM

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

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

146 mm

125.5 mm
Width

74.4 mm

63.9 mm
Thickness

12.6 mm

11.7 mm
Weight

200 g

120 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, Gold

Display
Display type

TFT capacitive touchscreen

TN TFT capacitive touchscreen
Physical size

4.7 inches

4.0 inches
Resolution

720 x 1280 pixels

480 x 800 pixels
Pixel density

312 ppi

233 ppi
Display colors

-

16777216
Protection

Corning Gorilla Glass 3

Corning Gorilla Glass
Multitouch

Yes

Yes

Hardware
CPU

Quad-core 1.3 GHz ARM Cortex-A7

Quad-core 1.4 GHz Cortex-A53
Chipset

Qualcomm MSM8909 Snapdragon 210

Unisoc SC9832E
GPU

Adreno 304

Mali-T820 MP1
Memory RAM

2 GB

1 GB
Internal storage

16 GB

8 GB
Memory card

microSD

microSD, microSDHC, microSDXC
Memory card max

64 GB

64 GB

OS
OS

Android 7.0 (Nougat)

Android 8.1 Oreo Go Edition

Main camera
Main camera

8 MP

2 MP
Primary camera resolution

-

1600 x 1200 pixels
Primary camera video

720p@30fps

720p@30fps
Primary camera Autofocus

autofocus

-
Primary camera flash

LED flash

LED flash
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

Selfie camera
Selfie camera

2 MP

2 MP
Selfie camera resolution

-

1600 x 1200 pixels
Selfie camera video

-

480p@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

microUSB 2.0
USB On-The-Go

Yes

-
Bluetooth

v4.1

v4.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

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

Browser
HTML

HTML5

HTML5

Battery
Battery type

Li-Ion

Li-Po
Battery capacity

4000 mAh

2250 mAh
Battery removable

Non-removable

Removable
Talk time 2G

-

16 h
Talk time 3G

-

16 h
Talk time 4G

-

17.5 h
Standby time 2G

-

240 h
Standby time 3G

-

240 h

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