Asus ROG Phone II vs Samsung Galaxy S21 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

8.5	8.5
Asus ROG Phone II	Samsung Galaxy S21
Released · Sep 04, 2019	Released · Jan 29, 2021
6.6-inch	6.2-inch
Dual camera	Triple camera
12GB · 512GB	8GB · 128GB
6000 mAh	4000 mAh
	Check prices

Design

Dimensions
6.73 x 3.06 x 0.37 inches 170.99 x 77.6 x 9.48 mm	5.97 x 2.80 x 0.31 inches 151.7 x 71.2 x 7.9 mm
Weight
8.47 oz (240.0 g)	6.03 oz (171.0 g)
Materials
Back: Glass (Corning Gorilla Glass 3) Frame: Aluminum	Back: Plastic Frame: Aluminum
Resistance
	Water, Dust; IP68
Biometrics
2D Face unlock, Optical in-screen fingerprint	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
	Right: Volume control, Lock/Unlock key
Colors
Black Glare	Phantom pink, Violet, Gray, White

Display

Size
6.6-inch	6.2-inch
Resolution
2340x1080px, 19.5:9 ratio, 391 PPI	2400x1080px, 20:9 ratio, 424 PPI
Technology
AMOLED	Dynamic AMOLED
Refresh rate
120Hz	120Hz (adaptive)
Screen-to-body
80.24 %	86.06 %
Peak brightness
600 cd/m2 (nit)	1300 cd/m2 (nit)
Features
HDR support, Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 855 Plus SM8150-AC (7 nm)	Qualcomm Snapdragon 888 (5 nm)
Processor
Octa-core 2960 MHz Kryo 485	Octa-core 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680
GPU
Adreno 640	Adreno 660
RAM
12GB (LPDDR4)	8GB (LPDDR5)
Internal storage
512GB (UFS 3.0)	128GB (UFS 3.0)
Storage expansion
not expandable	not expandable
OS
Android (11, 10, 9.0 Pie)	Android (13, 12, 11), Samsung One UI

Battery

Capacity
6000 mAh	4000 mAh
Type
	Li - Polymer
Charging
Qualcomm Quick Charge 4+, USB Power Delivery	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging
Charge speed
	Wired: 25.0W Wireless: 15.0W

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

4h 28min

Browsing

7h 47min

Video

7h 36min

Gaming

7h 9min

Camera

Rear
Dual camera	Triple camera
Main camera
48 MP (Laser and PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm	12 MP (OIS, PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm
Second camera
13 MP (Ultra-wide) Aperture size: F2.4 Focal Length: 11 mm	12 MP (Ultra-wide, Autofocus) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
	64 MP (Telephoto, OIS, PDAF) Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/1.7" Pixel size: 0.8 μm
Flash
Dual LED	LED
Video recording
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (480 fps) Time-lapse video, Picture-taking during video recording, EIS	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps) OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS
Front
24 MP (HDR), Video capture: 1920x1080 (Full HD)	10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)

Connectivity & Features

Bluetooth
5.0, Yes	5.0
WLAN
802.11 a,b,g,n,ac,ad,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
Type-C, USB 3.1	Type-C, USB 3.2
Hearing aid compatible
M3/T3	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Dual-band positioning, 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, Hall (for flip covers), Barometer
Other
NFC	NFC, ANT+

Multimedia

Headphones
3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Multiple speakers	Earpiece, Multiple speakers
Features
DTS:X Virtual Surround, aptX-HD	32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
DLNA,Wireless screen share	Wireless screen share
Radio
FM	FM, Stereo, RDS
Additional microphone(s)
Noise cancellation	Noise cancellation, Video recording

Cellular

5G
	Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (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), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT), 29(700 d), 32(1500 L-band), 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), 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)
4G (TDD)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+), 46	Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
3G
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 Pro Cat 18 (1200/150 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

Regulatory Approval

FCC approval
Date approved: Aug 13, 2019 FCC ID value: MSQI001D	Date approved: Dec 08, 2020 FCC ID value: A3LSMG991U
Measured SAR
Head: 1.04 W/kg Body: 0.83 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.19 W/kg	Head: 0.36 W/kg Body: 1.08 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.09 W/kg Phablet: 2.49 W/kg

Buyers information

MSRP
	$ 800
In The Box
AeroActive Cooler II, ASUS ZenEar Pro Hi-Res earphone with microphone (optional), Transparent case / Aero case, Type-C to C Cable (120cm), Ejector pin (SIM tray needle), USB power adapter (18W / 30W), Documentation (user guide, warranty card)	C to C Data Cable, Ejection Pin

Availability

Officially announced
Jul 22, 2019	Jan 14, 2021

Alternative variants


Internal storage	1000GB
Colors	Matte Black
Data Speed	LTE-A Pro Cat 20 (2000/150 Mbit/s)

with 256GB storage


Internal storage	256GB

for Europe


System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 2900 MHz 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55
GPU	Mali G78 MP14
Weight	5.96 oz (169.0 g)
5G	Bands SA, NSA, Sub-6
FCC approval	Date approved: Dec 18, 2020 FCC ID value: A3LSMG991B
Measured SAR	Head: 0.42 W/kg Body: 0.94 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.34 W/kg Phablet: 2.37 W/kg

Links

Full specifications
Asus ROG Phone II Specs	Samsung Galaxy S21 Specs
PhoneArena Review
Asus ROG Phone II Review	Samsung Galaxy S21 Review
User Reviews
Asus ROG Phone II User Reviews	Samsung Galaxy S21 User Reviews