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Samsung Galaxy M30 vs Samsung Galaxy J7 Max vs Samsung Galaxy M21

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

Comparison mode:

Display

Size:

6.4 inches
5.7 inches
6.4 inches

Resolution:

2280 x 1080 pixels, 19.5:9 ratio, 395 PPI
1920 x 1080 pixels, 386 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI

Technology:

Super AMOLED
IPS LCD
Super AMOLED

Screen-to-body:

86.66 %
72.58 %
84.11 %

Colors:

16 777 216

Peak brightness:

420 cd/m2 (nit)

Touchscreen:

Capacitive, Multi-touch

Features:

Proximity sensor
Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor

Hardware

System chip:

Samsung Exynos 7 Octa 7904
MediaTek Helio P20 MT6757
Exynos 9611

Processor:

Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, ARM Cortex-A53, 64-bit, 16 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm

GPU:

Mali-G71 MP2
Mali-T880 MP2
Mali-G72 MP3

RAM:

6GB LPDDR4
4GB LPDDR4
4GB LPDDR4

Internal storage:

128GB, available to use: 107.6 GB
32GB, available to use: 23.9 GB
64GB, available to use: 49 GB

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 256 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (9.0 Pie, 8.1 Oreo), Samsung One UI
Android (7.0 Nougat), Samsung Experience UI
Android (11, 10), Samsung One UI

Battery

Capacity:

5000 mAh
3300 mAh
6000 mAh

Type:

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

Charging:

Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging
Fast charging

Camera

Rear:

Triple camera
Single camera
Triple camera

Main camera:

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

Specifications:

Aperture size: F1.9; Focal length: 27 mm; Sensor size: 1/3.1"; Pixel size: 1.12 μm
Aperture size: F1.7
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

5 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera:

5 MP (Depth information)
5 MP (Depth information)

Specifications:

Aperture size: F2.2
Aperture size: F2.2

Video recording:

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

Features:

Video calling, Video sharing
Video calling, Video sharing
EIS

Front:

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

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)

Design

Dimensions:

6.26 x 2.96 x 0.33 inches (159 x 75.1 x 8.5 mm)
6.17 x 3.10 x 0.32 inches (156.7 x 78.8 x 8.1 mm)
6.26 x 2.96 x 0.35 inches (159.0 x 75.1 x 8.9 mm)

Weight:

6.14 oz (174.0 g)
6.31 oz (179.0 g)
6.63 oz (188.0 g)

Materials:

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

Biometrics:

2D Face unlock, Fingerprint (touch)
Fingerprint (touch)
2D Face unlock, Fingerprint (touch)

Features:

Soft keys
Touch sensitive control keys, Notification light

Keys:

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

Colors:

Black, Blue
Black, Gold
Midnight blue, Raven black

Cellular

LTE (FDD):

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

LTE (TDD):

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

UMTS:

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

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Yes
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

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

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
4.2
5.0

Wi-Fi:

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

USB:

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

Features:

Charging, Mass storage device
Mass storage device, OTG, Charging
Charging

Location:

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

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope

Other:

VoIP, Tethering, Computer sync, OTA sync
VoIP, Tethering, Computer sync, OTA sync

Phone features

Notifications:

Haptic feedback

Other features:

Voice dialing, Voice commands, Voice recording

Regulatory Approval

FCC approval:

Date approved:

Feb 13, 2019

FCC ID value:

A3LSMM305F

Measured SAR:

Head:

0.28 W/kg
0.57 W/kg

Body:

0.39 W/kg
1.06 W/kg

Simultaneous Transmission:

1.24 W/kg

Wireless Router:

0.93 W/kg

Buyers information

In The Box:

This is the official Samsu​ng Galaxy M21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Feb 27, 2019
Jun 14, 2017
Mar 18, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless