Motorola Moto G7 vs Samsung Galaxy A21 vs Google Pixel 4a

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

Display

Size:

6.2 inches
6.5 inches
5.8 inches

Resolution:

2270 x 1080 pixels, 19:9 ratio, 403 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
2340 x 1080 pixels, 19.5:9 ratio, 444 PPI

Technology:

IPS LCD
IPS LCD
OLED

Screen-to-body:

82.58 %
79.20 %
82.53 %

Features:

Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
60Hz refresh rate, HDR support, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 632 SDM632
Mediatek Helio P35
Qualcomm Snapdragon 730 SM7150-AA

Processor:

Octa-core, 1800 MHz, Kryo 250, 64-bit, 14 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm

GPU:

Adreno 506
PowerVR GE8320
Adreno 618

RAM:

4GB LPDDR4
3GB LPDDR4
6GB LPDDR4

Internal storage:

64GB
32GB (eMMC 5.1), available to use: 19.8 GB
128GB, not expandable

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (9.0 Pie)
Android (10), Samsung One UI
Android (11, 10)

Battery

Capacity:

3000 mAh
4000 mAh
3140 mAh

Type:

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

Battery life test results:

Charging:

Motorola TurboPower
Fast charging
USB Power Delivery

Max charge speed:

Wired: 15.0W
Wired: 18.0W

Camera

Rear:

Dual camera
Quad camera
Single camera

Main camera:

12 MP (PDAF)
16 MP (PDAF)
12.2 MP (OIS, PDAF)

Specifications:

Aperture size: F1.8; Pixel size: 1.25 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera:

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

Specifications:

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

Third camera:

2 MP (Macro)

Specifications:

Aperture size: F2.4

Fourth camera:

2 MP (Depth information)

Specifications:

Aperture size: F2.4

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (60 fps), 1280x720 (HD) (120 fps)
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)

Features:

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

Front:

8 MP (HDR)
13 MP
8 MP

Video capture:

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

Design

Dimensions:

6.18 x 2.96 x 0.31 inches (157 x 75.3 x 8 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
5.67 x 2.73 x 0.32 inches (144 x 69.4 x 8.2 mm)

Weight:

6.07 oz (172.0 g)
6.81 oz (193.0 g)
5.04 oz (143.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 3); Frame: Plastic
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic

Resistance:

Splash

Biometrics:

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

Keys:

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

Colors:

Black, White
Black
Just black

Cellular

LTE (FDD):

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+), 66(AWS-3)
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)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 18(800 Lower), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD):

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

UMTS:

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

Data Speed:

LTE-A Cat 7 (300/100 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM, eSIM

HD Voice:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Multiple speakers

Features:

Album art cover, Background playback
aptX, aptX-HD

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
5.1

Wi-Fi:

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

USB:

Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Type-C (reversible), USB 3.1

Features:

Charging, OTG, Mass storage device
Charging
Charging

Location:

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

Sensors:

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

Other:

VoIP, Tethering, Computer sync, OTA sync
NFC
NFC

Hearing aid compatible:

M4, T3
M3, T4

Regulatory Approval

FCC approval:

Date approved:

Apr 17, 2020
Jun 25, 2020

FCC ID value:

ZCASMA215U link
A4RG025J link

Measured SAR:

Head:

0.42 W/kg
1.18 W/kg

Body:

1.27 W/kg
1.19 W/kg

Simultaneous Transmission:

1.27 W/kg
1.59 W/kg

Wireless Router:

1.27 W/kg
1.00 W/kg

Buyers information

Price:

$ 299
$ 250
$ 349

In The Box:

15W TurboPower charger, USB-C Cable, SIM pin, Guides
This is the official Samsu​ng Galaxy A21 User Guide in English provided from the manufacturer.
18W USB-C power adapter, 1 m USB-C to USB-C cable (USB 2.0), Quick Start Guide, Quick Switch Adapter, SIM tool

Availability

Officially announced:

Feb 07, 2019
Apr 08, 2020
Aug 03, 2020
This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.
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