Motorola DROID Turbo 2 vs Google Pixel 4a vs Samsung Galaxy S21

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

Display

Size:

5.4 inches
5.8 inches
6.2 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, 424 PPI

Technology:

AMOLED
OLED
Dynamic AMOLED

Screen-to-body:

68.03 %
82.53 %
86.06 %

Peak brightness:

1300 cd/m2 (nit)

Features:

ShatterShield, Ambient light sensor, Proximity sensor
60Hz refresh rate, HDR support, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
120Hz refresh rate (adaptive), HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 810 MSM8994
Qualcomm Snapdragon 730G SM7150-AA
Qualcomm Snapdragon 888

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, 2840 MHz, Kryo 680, 64-bit, 5 nm

GPU:

Adreno 430
Adreno 618
Adreno 660

RAM:

3GB
6GB LPDDR4
8GB LPDDR5

Internal storage:

64GB
128GB (UFS 2.1), not expandable
128GB (UFS 3.0), not expandable

Storage expansion:

microSDXC up to 2000 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (7.0 Nougat, 6.0 Marshmallow, 5.1 Lollipop)
Android (11, 10)
Android (11), 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
Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging

Max charge speed:

Wired: 18.0W
Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Single camera
Single camera
Triple camera

Main camera:

21 MP (PDAF)
12.2 MP (OIS, PDAF)
12 MP (OIS, 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: F1.8; Focal length: 26 mm; Sensor size: 1/1.76"; Pixel size: 1.8 μm

Second camera:

64 MP (Telephoto, OIS, PDAF)

Specifications:

Aperture size: F2.0; Focal Length: 29 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm

Third camera:

12 MP (Ultra-wide, Autofocus)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 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)
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

HDR, Video calling, Video sharing
EIS
OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS

Front:

5 MP (Flash)
8 MP
10 MP (PDAF, HDR)

Video capture:

1920x1080 (Full HD)
3840x2160 (4K UHD) (60 fps)

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)
5.97 x 2.80 x 0.31 inches (151.7 x 71.2 x 7.9 mm)

Weight:

5.96 oz (169.0 g)
5.04 oz (143.0 g)
6.03 oz (171.0 g)

Materials:

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

Resistance:

Splash
Water, Dust; IP68

Biometrics:

Fingerprint (touch)
2D Face unlock, Ultrasonic 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
Phantom pink, Violet, Gray, White

Cellular

5G:

n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave

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), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)

UMTS:

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

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, UMTS

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM, eSIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
3.5mm jack
No 3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Multiple speakers

Features:

Album art cover, Background playback
aptX, aptX-HD
32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM, Stereo, RDS

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation, Video recording

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, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot

USB:

microUSB, USB 2.0
Type-C (reversible), USB 3.1
Type-C (reversible), USB 3.2

Features:

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

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), Barometer

Other:

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

Hearing aid compatible:

M3, T4
M3, T3

Regulatory Approval

FCC approval:

Date approved:

Aug 12, 2015
Jun 25, 2020
Dec 08, 2020

FCC ID value:

IHDT56UA1 link
A4RG025J link
A3LSMG991U link

Measured SAR:

Head:

1.38 W/kg
1.18 W/kg
0.36 W/kg

Body:

0.17 W/kg
1.19 W/kg
1.08 W/kg

Simultaneous Transmission:

1.58 W/kg
1.59 W/kg
3.96 W/kg

Wireless Router:

0.24 W/kg
1.00 W/kg
1.09 W/kg

Phablet:

2.49 W/kg

Buyers information

Price:

$ 720
$ 349
$ 800

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
C to C Data Cable, Ejection Pin

Availability

Officially announced:

Oct 27, 2015
Aug 03, 2020
Jan 14, 2021
FCC OKs Cingular\'s purchase of AT&T Wireless