Asus ROG Phone II vs Samsung Galaxy S21 Ultra Specs Comparison

Availability

Officially announced
Jul 22, 2019	Jan 14, 2021
Prices (MSRP)
	12GB/128GB - $1200 | €1399

Design

Dimensions
6.73 x 3.06 x 0.37 inches 170.99 x 77.6 x 9.48 mm	6.50 x 2.98 x 0.35 inches (~0.37 inches with camera bump) 165.1 x 75.6 x 8.9 mm (~9.4 mm with camera bump)
Weight
8.47 oz / 240.0 g	8.04 oz / 229.0 g
Materials
Back: Glass (Corning Gorilla Glass 3) Frame: Aluminum	Back: Glass (Corning Gorilla Glass Victus) 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 black, Silver

Display

Size
6.6-inch, 80.24% screen-to-body	6.8-inch, 89.33% screen-to-body
Type
AMOLED, 120Hz, HDR, 600 nits	Dynamic AMOLED, 120Hz, HDR, 1500 nits
Resolution
2340x1080px, 19.5:9 ratio, 391 PPI	3200x1440px, 20:9 ratio, 516 PPI
Protection
Corning Gorilla Glass 6	Corning Gorilla Glass Victus

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
6 (Poor)	1.5 (Good)

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 855 Plus SM8150-AC (7 nm)	Snapdragon 888 SM8350 (5 nm)
Processor
Octa-core 2960 MHz Kryo 485	Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680
GPU
Adreno 640	Adreno 660
Memory
12GB (LPDDR4)/512GB (UFS 3.0) 12GB/1000GB	12GB (LPDDR5)/128GB (UFS 3.1) 12GB/256GB 16GB/512GB
Storage expansion
not expandable	not expandable
OS
Android (11, 10, 9.0 Pie)	Android (14, 13, 12, 11)

PhoneArena Performance Test

GeekBench 6 Single
Untested	1117
GeekBench 6 Multi
Untested	3312
3D Mark High
Untested	1963
3D Mark Low
Untested	1179

Learn more on our PhoneArena Performance Test Results page.

Battery

Type
6000 mAh	5000 mAh, 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

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

6h 15min

Browsing

14h 43min

Video

8h 52min

Gaming

8h 40min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Dual camera	Quad 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	108 MP (OIS, Laser and PDAF) Aperture size: F1.8 Focal length: 24 mm Sensor size: 1/1.33" Pixel size: 0.8 μm
Second camera
13 MP (Ultra-wide) Aperture size: F2.4 Focal Length: 11 mm	12 MP (Ultra-wide, PDAF) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
	10 MP (Telephoto, OIS, PDAF) Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 70 mm Sensor size: 1/3.2" Pixel size: 1.22 μm
Fourth camera
	10 MP (Telephoto, Periscope, OIS, PDAF) Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 70 mm Sensor size: 1/3.2" Pixel size: 1.22 μm
Flash
Dual LED	LED
Video recording
4K UHD (60 fps), 1080p (240 fps), 720p (480 fps) Time-lapse video, Picture-taking during video recording, EIS	8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps) OIS, HDR, Hyperlapse, Video light, EIS
Front
24 MP (HDR) Video capture: 1080p	40 MP (PDAF, HDR) Video capture: 4K UHD (60 fps)

Connectivity & Features

Bluetooth
5.0, Yes	5.1
WLAN
a,b,g,n,ac,ad,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ad	a,b,g,n,ac,Wi-Fi 6,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax
USB
Type-C, USB 3.1	Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, Ambient light sensor, Proximity sensor
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
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
Radio
FM
Additional microphone(s)
Noise cancellation

Cellular

5G Bands
	n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
LTE Bands
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 29, 32, 66	1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71
4G (TDD) Bands
34, 38, 39, 40, 41, 46	38, 39, 40, 41, 46, 48
3G Bands
1, 2, 4, 5, 8	1, 2, 4, 5, 8
Data Speed
LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A Pro Cat 20 (2000/150 Mbit/s)
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 22, 2020 FCC ID value: A3LSMG998U
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: 0.77 W/kg Body: 1.02 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.16 W/kg Phablet: 3.15 W/kg

Alternative variants

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

with 256GB storage

Memory	256GB
Colors	Phantom black
Prices (MSRP)	$1250

with 512GB storage

Memory	16GB/512GB
Colors	Phantom black
Prices (MSRP)	$1380

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 1x2.91GHz Cortex-X1 3x2.81G​Hz Cortex-A78 4x2.2G​Hz Cortex-A55
GPU	Mali G78 MP14
Weight	8.01 oz / 227.0 g
5G Bands	SA, NSA, Sub-6
FCC approval	Date approved: Dec 22, 2020 FCC ID value: A3LSMG998B
Measured SAR	Head: 0.16 W/kg Body: 0.72 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.34 W/kg Phablet: 3.86 W/kg

Discover more

Full Specs Asus ROG Phone II Specs PA Review Asus ROG Phone II Review

Full Specs Samsung Galaxy S21 Ultra Specs PA Review Samsung Galaxy S21 Ultra Review