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Samsung Galaxy J7 Refine vs Samsung Galaxy A12 vs Samsung Galaxy A21

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

Comparison mode:

Display

Size:

5.5 inches
6.5 inches
6.5 inches

Resolution:

1280 x 720 pixels, 16:9 ratio, 267 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI

Technology:

TFT
LCD
IPS LCD

Refresh rate:

60Hz

Screen-to-body:

71.45 %
85.80 %
79.20 %

Colors:

16 777 216

Features:

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

Hardware

System chip:

Samsung Exynos 7 Octa 7884
Mediatek Helio P35 MT6765
Mediatek Helio P35

Processor:

Octa-core, 1600 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2350 MHz, Cortex-A53, 64-bit, 12 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU:

Mali-T830 MP1
PowerVR GE8320
PowerVR GE8320

RAM:

2GB LPDDR3
4GB LPDDR4
3GB LPDDR4

Internal storage:

32GB
64GB (eMMC 5.1), available to use: 48.2 GB
32GB (eMMC 5.1), available to use: 19.8 GB

Storage expansion:

microSDXC up to 400 GB
microSDXC up to 1024 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (8.0 Oreo)
Android (10), Samsung One UI UI
Android (10), Samsung One UI

Battery

Capacity:

3300 mAh
5000 mAh
4000 mAh

Type:

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

Charging:

Samsung Adaptive Fast Charging
Fast charging

Max charge speed:

Wired: 15.0W
Wired: 15.0W

Camera

Rear:

Single camera
Quad camera
Quad camera

Main camera:

13 MP (PDAF)
48 MP (Autofocus)
16 MP (PDAF)

Specifications:

Aperture size: F1.7; Focal length: 28 mm; Sensor size: 1/3.06"; Pixel size: 1.12 μm
Aperture size: F2.0; Focal length: 26 mm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm

Second camera:

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

Specifications:

Aperture size: F2.2
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera:

2 MP (Macro)
2 MP (Macro)

Specifications:

Aperture size: F2.4
Aperture size: F2.4

Fourth camera:

2 MP (Depth information)
2 MP (Depth information)

Specifications:

Aperture size: F2.4
Aperture size: F2.4

Video recording:

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

Features:

Video calling, Video sharing

Front:

13 MP
8 MP
13 MP

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.03 x 3 x 0.34 inches (153.2 x 76.2 x 8.6 mm)
6.46 x 2.98 x 0.35 inches (164 x 75.8 x 8.9 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)

Weight:

6.38 oz (181.0 g)
7.23 oz (205.0 g)
6.81 oz (193.0 g)

Materials:

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

Biometrics:

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

Features:

Touch sensitive control keys

Keys:

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

Colors:

Gold
Black, White, Blue, Red
Black

Cellular

LTE (FDD):

Bands 25(1900+), 26(850+)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)

LTE (TDD):

Bands 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

UMTS:

Bands 1(2100), 5(850), 8(900)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)

Data Speed:

LTE-A Cat 6 (300/50 Mbit/s), HSPA, HSUPA
LTE, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

HD Voice:

Yes
Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback

Screen mirroring:

Wireless screen share
Wireless screen share, MirrorLink
Wireless screen share

Radio:

FM

Additional microphone(s):

Yes

Connectivity & Features

Bluetooth:

4.2
5.0
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Hotspot, Wi-Fi Direct
802.11 b, g, n; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; 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, Charging
Charging, Mass storage device
Charging

Location:

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

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer
Accelerometer, Gyroscope, Compass

Other:

ANT+, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync
NFC
NFC

Hearing aid compatible:

M3, T3
M4, T3

Phone features

Notifications:

Haptic feedback, Music ringtones, Vibration, Flight mode, Silent mode, Speakerphone

Other features:

Voice dialing, Voice commands, Voice recording, TTY/TDD

Regulatory Approval

FCC approval:

Date approved:

May 07, 2018
Mar 11, 2021
Apr 17, 2020

FCC ID value:

A3LSMJ737P
A3LSMA125U
ZCASMA215U

Measured SAR:

Head:

0.96 W/kg
1.14 W/kg
0.42 W/kg

Body:

0.76 W/kg
1.20 W/kg
1.27 W/kg

Simultaneous Transmission:

1.59 W/kg
1.59 W/kg
1.27 W/kg

Wireless Router:

1.20 W/kg
1.34 W/kg
1.27 W/kg

Phablet:

3.91 W/kg

Buyers information

Price:

€ 179
$ 250

User Manual:

This is the official Samsu​ng Galaxy A12 User Guide in English provided from the manufacturer.

In The Box:

Charger, USB Cable, Important Information Booklet
Power brick, USB cable, Headphones, Sim card extraction tool
This is the official Samsu​ng Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Jun 29, 2018
Nov 24, 2020
Apr 08, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless