Samsung Galaxy M40 vs vivo NEX 3

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

HSDPA 850, 900, 2100

HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500)

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE Cat12, 603 Mbps download, 102 Mbps upload

LTE-A (5CA), Cat18, 1200 Mbps download, 150 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

Front/back glass, aluminum frame
SIM

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

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

155.3 mm

167.4 mm
Width

73.9 mm

76.1 mm
Thickness

7.9 mm

9.4 mm
Weight

168 g

217.3 g
Colors

Black, Blue

Black, Light Blue

Display
Display type

PLS capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.3 inches

6.89 inches
Resolution

1080 x 2340 pixels

1080 x 2256 pixels
Pixel density

409 ppi

363 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, Corning Gorilla Glass

Scratch resistant, 3D curved glass screen
Multitouch

Yes

Yes

Main camera
Camera type

Triple

Triple
Main camera

32 MP, f/1.7 , 0.8 µm

64 MP, f/1.8 , 0.8 µm, 1/1.7"
8 MP, f/2.2 , 12 mm, 1.12 µm

13 MP, f/2.5 , 13 mm
5 MP, f/2.2

13 MP, f/2.2
Primary camera resolution

6528 x 4896 pixels

-
Primary camera video

2160p@30fps, 1080p@30fps

2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS
Primary camera flash

LED flash

LED flash
Camera features

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

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

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C reversible connector

Type-C 1.0 reversible connector
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth AVRCP

Yes

-
bluetooth HFP

Yes

-
bluetooth HID

Yes

-
bluetooth OPP

Yes

-
bluetooth PAN

Yes

-
bluetooth LE

-

Yes
bluetooth DIP

Yes

-
bluetooth MAP

Yes

-
bluetooth PBAP

PBAP/PAB

-
bluetooth HOGP

Yes

-
bluetooth HSP

Yes

-
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

Yes

-
BDS

-

Yes

Features
Sensors

Accelerometer, compass, gyroscope, hall, proximity, light, fingerprint

Accelerometer, compass, fingerprint, gravity, gyroscope, light, proximity, in-display fingerprint sensor