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Samsung Galaxy J7 Max vs Samsung Galaxy M40 vs OPPO A91

Compare phone and tablet specifications of up to three devices at once.

Comparison mode:

Display

Size:

5.7 inches
6.3 inches
6.4 inches

Resolution:

1920 x 1080 pixels, 386 PPI
2340 x 1080 pixels, 19.5:9 ratio, 409 PPI
2400 x 1080 pixels, 20:9 ratio, 411 PPI

Technology:

IPS LCD
IPS LCD
AMOLED

Refresh rate:

60Hz

Screen-to-body:

72.58 %
84.94 %
84.05 %

Colors:

16 777 216

Touchscreen:

Capacitive, Multi-touch

Features:

Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass), Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip:

MediaTek Helio P20 MT6757
Qualcomm Snapdragon 675 SM6150
Mediatek Helio P70 MT6771V

Processor:

Octa-core, 2300 MHz, ARM Cortex-A53, 64-bit, 16 nm
Octa-core, 2000 MHz, Kryo 460, 64-bit, 11 nm
Octa-core, 2100 MHz, Cortex-A73, 64-bit, 12 nm

GPU:

Mali-T880 MP2
Adreno 612
Mali-G72 MP3

RAM:

4GB LPDDR4
6GB LPDDR4
4GB LPDDR4

Internal storage:

32GB, available to use: 23.9 GB
128GB, available to use: 105 GB
128GB (UFS 2.1)

Storage expansion:

microSDXC up to 256 GB
microSDXC up to 512 GB
microSDXC

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (7.0 Nougat), Samsung Experience UI
Android (10, 9.0 Pie), Samsung One UI
Android (9.0 Pie), ColorOS 6.1.2 UI

Battery

Capacity:

3300 mAh
3500 mAh
4025 mAh

Type:

Li - Ion, Not user replaceable
Not user replaceable
Li - Polymer, Not user replaceable

Charging:

Samsung Adaptive Fast Charging
SuperVOOC 3.0

Max charge speed:

Wired: 20.0W

Camera

Rear:

Single camera
Triple camera
Dual camera

Main camera:

13 MP (Autofocus, CMOS image sensor)
32 MP (PDAF)
48 MP (PDAF)

Specifications:

Aperture size: F1.7
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26mm (wide) mm; Sensor size: 1/2.3"; Pixel size: 0.8 μm

Second camera:

8 MP (Ultra-wide, PDAF)
8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/1.4"; Pixel size: 1.12 μm

Third camera:

5 MP (Depth information)
2 MP (Macro)

Specifications:

Aperture size: F2.2; Focal Length: 24 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4; Sensor size: 1/1.5"; Pixel size: 1.75 μm

Fourth camera:

2 MP (Depth information)

Specifications:

Aperture size: F2.4; Sensor size: 1/3.1"; Pixel size: 1 μm

Video recording:

1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)

Features:

Video calling, Video sharing
Hyperlapse, Video calling, Video sharing
HDR, Time-lapse video, EIS

Front:

13 MP (Flash)
16 MP (HDR)
16 MP

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
1280x720 (HD) (30 fps)

Design

Dimensions:

6.17 x 3.10 x 0.32 inches (156.7 x 78.8 x 8.1 mm)
6.11 x 2.91 x 0.31 inches (155.3 x 73.9 x 7.9 mm)
6.31 x 2.89 x 0.31 inches (160.2 x 73.3 x 7.9 mm)

Weight:

6.31 oz (179.0 g)
5.93 oz (168.0 g)
6.07 oz (172.0 g)

Materials:

Back: Aluminum
Back: Plastic
Back: Plastic; Frame: Plastic

Biometrics:

Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
In-screen fingerprint

Features:

Touch sensitive control keys, Notification light

Keys:

Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Left: Volume control; Right: Lock/Unlock key

Colors:

Black, Gold
Midnight blue, Seawater blue
Lightening Black, Unicorn White, Blazing Blue

Cellular

LTE (FDD):

Bands 1(2100), 3(1800), 5(850), 8(900), 20(800 DD)
Bands 1(2100), 3(1800), 5(850), 8(900)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900)

LTE (TDD):

Bands 40(2300)
Bands 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 5(850), 8(900), 2(1900), 1(2100)
Bands 5(850), 8(900), 1(2100)
Bands 1(2100), 5(850), 8(900)

Data Speed:

LTE-A, HSPA
LTE-A Cat 13/5 (400/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE, HSDPA+ (4G) 42.2 Mbit/s

Dual SIM:

Yes
Shared with microSD
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
No 3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback
Dolby Atmos, Album art cover, Background playback

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

4.2
5.0
4.2

Wi-Fi:

802.11 a, b, g, n, dual-band; Hotspot, Wi-Fi Direct
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 b, g, n, ac; Wi-Fi Direct, Hotspot

USB:

microUSB, USB 2.0
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0

Features:

Mass storage device, OTG, Charging
Charging, Headphones port, Mass storage device
Charging, OTG

Location:

GPS, A-GPS, Glonass
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope

Other:

VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync

Phone features

Notifications:

Haptic feedback

Other features:

Voice dialing, Voice commands, Voice recording

Regulatory Approval

Measured SAR:

Head:

0.57 W/kg

Body:

1.06 W/kg

Buyers information

In The Box:

Type-C earphones, Data cable, 15W charger, User manual, Ejection pin

Availability

Officially announced:

Jun 14, 2017
Jun 11, 2019
Dec 20, 2019
FCC OKs Cingular\'s purchase of AT&T Wireless