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OnePlus 3 vs Xiaomi Redmi Note 8 2021 vs Google Pixel 4a

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

Comparison mode:

Display

Size:

5.5 inches
6.3 inches
5.8 inches

Resolution:

1920 x 1080 pixels, 401 PPI
2340 x 1080 pixels, 19.5:9 ratio, 409 PPI
2340 x 1080 pixels, 19.5:9 ratio, 444 PPI

Technology:

Super AMOLED
IPS LCD
OLED

Refresh rate:

60Hz
60Hz

Screen-to-body:

73.15 %
81.89 %
82.53 %

Colors:

16 777 216

Touchscreen:

Capacitive, Multi-touch

Features:

Scratch-resistant glass (Corning Gorilla Glass 4), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
HDR support, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 820 MSM8996
MediaTek Helio G85 MT6769Z
Qualcomm Snapdragon 730G SM7150-AA

Processor:

Quad-core, 2200 MHz, Kryo, 64-bit
Octa-core, 2000 MHz, Cortex-A75, 64-bit, 12 nm
Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm

GPU:

Adreno 530
Mali G52 MC2
Adreno 618

RAM:

6GB LPDDR4
4GB LPDDR4
6GB LPDDR4

Internal storage:

64GB
64GB (eMMC 5.1)
128GB (UFS 2.1), not expandable

Storage expansion:

microSDXC up to 128 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (9.0 Pie, 7.0 Nougat, 6.0 Marshmallow), OnePlus OxygenOS UI
Android (11), MIUI 12.5 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:

OnePlus Dash Charge
Fast charging
USB Power Delivery

Max charge speed:

Wired: 18.0W
Wired: 18.0W

Camera

Rear:

Single camera
Quad camera
Single camera

Main camera:

16 MP (OIS, PDAF)
48 MP (Autofocus)
12.2 MP (OIS, PDAF)

Specifications:

Aperture size: F2.0; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera:

8 MP (Ultra-wide)

Specifications:

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

Third camera:

2 MP (Macro, Autofocus)

Specifications:

Aperture size: F2.4; Pixel size: 1.75 μm

Fourth camera:

2 MP (Depth information)

Specifications:

Aperture size: F2.4; Pixel size: 1.75 μm

Video recording:

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

Features:

Video calling
EIS

Front:

8 MP
13 MP
8 MP

Video capture:

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

Design

Dimensions:

6.01 x 2.94 x 0.29 inches (152.7 x 74.7 x 7.35 mm)
6.23 x 2.96 x 0.33 inches (158.3 x 75.3 x 8.35 mm)
5.67 x 2.73 x 0.32 inches (144 x 69.4 x 8.2 mm)

Weight:

5.57 oz (158.0 g)
6.70 oz (190.0 g)
5.04 oz (143.0 g)

Materials:

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

Biometrics:

Fingerprint (touch)
Fingerprint (touch)
Fingerprint (touch)

Features:

Notification light

Keys:

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

Colors:

Gold, Gray
Neptune Blue, Moonlight White, Space Black,
Just black

Cellular

LTE (FDD):

Bands 30(2300 WCS)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 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), 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)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

UMTS:

Bands 5(850), 8(900), 4(1700/2100), 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-A Cat 6 (300/50 Mbit/s), HSPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSPA
LTE-A Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Shared with microSD
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM, eSIM

HD Voice:

Yes

VoLTE:

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

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

4.2
5.2
5.1

Wi-Fi:

802.11 a, b, g, n, ac, dual-band
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:

Mass storage device, Charging
Charging, OTG
Charging

Location:

GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, Galileo, 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:

NFC, Tethering, Computer sync, OTA sync
Infrared
NFC

Hearing aid compatible:

M3, T4

Phone features

Notifications:

Haptic feedback, (MP3)

Other features:

Voice dialing, Voice commands, Voice recording

Regulatory Approval

FCC approval:

Date approved:

Jun 25, 2020

FCC ID value:

A4RG025J

Measured SAR:

Head:

1.18 W/kg

Body:

1.19 W/kg

Simultaneous Transmission:

1.59 W/kg

Wireless Router:

1.00 W/kg

Buyers information

Price:

$ 399
$ 349

In The Box:

Screen Protector (pre-applied), Dash Charge Type-C Cable, Dash Charge Adapter, SIM Tray Ejector1x Quick Start Guide
Adapter, USB Type-C cable, SIM Eject Tool, Protective Case, Quick Start Guide, Warranty Card
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:

Jun 14, 2016
May 24, 2021
Aug 03, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless