Comparison of Samsung Galaxy S21 Ultra 5G and Asus ROG Phone 3 ZS661KS

Comparison of Samsung Galaxy S21 Ultra 5G and Asus ROG Phone 3 ZS661KS [S]ave

Attribute	Asus ROG Phone 3 ZS661KS ×	Samsung Galaxy S21 Ultra 5G ×
General
Brand	Asus	Samsung
Launch
Announced	2020-07-22	2021-01-14
Body
Width (mm)	9.9	8.9
Length (mm)	171	165.1
Height (mm)	78	75.6
Weight (g)	240	227
SIM	Dual SIM (Nano-SIM, dual stand-by)	Single SIM (Nano-SIM and/or eSIM)
Front	Glass	Glass
Back	Glass	Glass
Frame	Aluminum	Aluminum
Network
Technology	5G CDMA GSM HSPA LTE	5G CDMA EVDO GSM HSPA LTE
2G bands	CDMA 800 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	CDMA 800 / 1900 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only)
3G bands	HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 - A version HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100	CDMA2000 1xEV HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands	1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 66, 71 - A version 1, 2, 3, 4, 5, 7, 8, 20, 28, 34, 38, 39, 40, 41	1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71
5G bands	1, 2, 3, 5, 28, 41, 66, 71, 77, 78, 79 SA/NSA - A version 41, 77, 78, 79 SA/NSA	2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave
Speed	5G 4.4 Gbps DL HSPA 42.2/5.76 Mbps LTE-A (6CA) Cat20 2000/150 Mbps	5G HSPA 42.2/5.76 Mbps LTE-A (CA)
Platform
OS	Android 10	Android 11
Chipset	Qualcomm SM8250 Snapdragon 865 5G+ (7 nm+)	Exynos 2100 (5 nm) - International
CPU	Octa-core (1x3.1 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585)	Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International
GPU	Adreno 650	Mali-G78 MP14 - International
Memory
Card slot	No	No
Internal	128GB 12GB RAM 128GB 8GB RAM 256GB 12GB RAM 512GB 12GB RAM 512GB 16GB RAM	128GB 12GB RAM 256GB 12GB RAM 512GB 16GB RAM
Display
Size (in)	6.59	6.8
Resolution (px)	1080 x 2340	1440 x 3200
Protection	Corning Gorilla Glass 6	Corning Gorilla Glass Victus
Display Type	AMOLED	Dynamic AMOLED 2X
Battery
Type	Li-Po	Li-Ion
Charging	Fast charging 30W, Power Delivery 3.0, Quick Charge 4.0, 3.0, Reverse charging 10W	Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W
Capcity (mAh)	6000	5000
Main Camera
Main Camera Type	Triple	Quad
Main Camera Properties	13 MP, f/2.4, 11mm, 125˚ (ultrawide) 5 MP, f/2.0, (macro) 64 MP, f/1.8, 26mm (wide), 1/1.73", 0.8µm, PDAF	10 MP, f/2.4, 70mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom 108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8µm, PDAF, Laser AF, OIS 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video
Main Camera Video	8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps, gyro-EIS	8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS
Main Camera Features	LED flash, HDR, panorama	LED flash, auto-HDR, panorama
Selfie Camera
Selfie Camera Type	Single	Single
Selfie Camera Properties	24 MP, f/2.0, 27mm (wide), 0.9µm	40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF
Selfie Camera Video	1080p@30fps	4K@30/60fps, 1080p@30fps
Selfie Camera Features	Panorama, HDR	Dual video call, Auto-HDR
Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot
Bluetooth	5.1, A2DP, LE, aptX HD, aptX Adaptive	5.2, A2DP, LE
GPS	+	+
NFC	+	+
Radio	No	FM radio (Snapdragon model only; market/operator dependent)
USB	USB Type-C 3.1 (side), USB Type-C 2.0 (bottom), accessory connector, USB On-The-Go	USB Type-C 3.2, USB On-The-Go
Sound
Loudspeaker	+	+
3.5mm jack	-	-
Features
Sensors	Fingerprint (under display accelerometer compass gyro optical) proximity	Fingerprint (under display accelerometer barometer compass gyro proximity ultrasonic)
Misc
Colors	Black Glare	Phantom Black Phantom Brown Phantom Navy Phantom Silver Phantom Titanium
Models	ASUS_I003D I003D I003DD ZS661KS	SM-G9980 SM-G998B SM-G998B/DS SM-G998N SM-G998U SM-G998U1 SM-G998W
SAR EU Head (W/kg)	-	0.71
SAR EU Body (W/kg)	-	1.58
SAR Head (W/kg)	0.74	0.77
SAR Body (W/kg)	1.5	1.02