Motorola DROID Turbo 2 vs Google Pixel 4a vs Samsung Galaxy A51

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

Display

Size:

5.4 inches
5.8 inches
6.5 inches

Resolution:

2560 x 1440 pixels, 540 PPI
2340 x 1080 pixels, 19.5:9 ratio, 444 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI

Technology:

AMOLED
OLED
Super AMOLED

Screen-to-body:

68.03 %
82.53 %
87.37 %

Features:

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

Hardware

System chip:

Qualcomm Snapdragon 810 MSM8994
Qualcomm Snapdragon 730G SM7150-AA
Samsung Exynos 9611

Processor:

Octa-core, 2000 MHz, ARM Cortex-A57 and ARM Cortex-A53, 64-bit
Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU:

Adreno 430
Adreno 618
Mali-G72 MP3

RAM:

3GB
6GB LPDDR4
4GB LPDDR4

Internal storage:

64GB
128GB (UFS 2.1), not expandable
128GB, available to use: 105.9 GB

Storage expansion:

microSDXC up to 2000 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (7.0 Nougat, 6.0 Marshmallow, 5.1 Lollipop)
Android (11, 10)
Android (11, 10), Samsung One UI

Battery

Capacity:

3760 mAh
3140 mAh
4000 mAh

Type:

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

Battery life test results:

Charging:

Fast charging, Qi and Powermat wireless charging
USB Power Delivery
Fast charging

Max charge speed:

Wired: 18.0W

Camera

Rear:

Single camera
Single camera
Quad camera

Main camera:

21 MP (PDAF)
12.2 MP (OIS, PDAF)
48 MP (PDAF)

Specifications:

Aperture size: F2.0
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

12 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm

Third camera:

5 MP (Macro)

Specifications:

Aperture size: F2.4; Focal Length: 40 mm

Fourth camera:

5 MP (Depth information)

Specifications:

Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm

Video recording:

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

Features:

HDR, Video calling, Video sharing
EIS
Hyperlapse, EIS

Front:

5 MP (Flash)
8 MP
32 MP (HDR)

Video capture:

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

Design

Dimensions:

5.90 x 3.07 x 0.36 inches (149.8 x 78 x 9.2 mm)
5.67 x 2.73 x 0.32 inches (144 x 69.4 x 8.2 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight:

5.96 oz (169.0 g)
5.04 oz (143.0 g)
6.07 oz (172.0 g)

Materials:

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

Resistance:

Splash

Biometrics:

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

Features:

Interchangeable covers

Keys:

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

Colors:

Black, White
Just black
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue

Cellular

LTE (FDD):

Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 13(700 c)
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)
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), 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), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)

UMTS:

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

Data Speed:

LTE Cat 4 (150/50 Mbit/s), HSPA, HSUPA, UMTS
LTE-A Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM, eSIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Loudspeaker

Features:

Album art cover, Background playback
aptX, aptX-HD
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

4.1
5.1
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; MIMO
802.11 a, b, g, n, ac, dual-band; MIMO, 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 3.1
Type-C (reversible), USB 2.0

Features:

Mass storage device, Charging
Charging
Charging, OTG

Location:

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

Sensors:

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

Other:

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

Hearing aid compatible:

M3, T4

Regulatory Approval

FCC approval:

Date approved:

Aug 12, 2015
Jun 25, 2020
Nov 28, 2019

FCC ID value:

IHDT56UA1 link
A4RG025J link
A3LSMA515FN link

Measured SAR:

Head:

1.38 W/kg
1.18 W/kg
0.89 W/kg

Body:

0.17 W/kg
1.19 W/kg
1.18 W/kg

Simultaneous Transmission:

1.58 W/kg
1.59 W/kg
1.56 W/kg

Wireless Router:

0.24 W/kg
1.00 W/kg
1.12 W/kg

Phablet:

2.76 W/kg

Buyers information

Price:

$ 720
$ 349
$ 400

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.

In The Box:

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:

Oct 27, 2015
Aug 03, 2020
Dec 12, 2019
FCC OKs Cingular\'s purchase of AT&T Wireless