Samsung Galaxy A72 (SM-A725M/DS) vs Samsung Galaxy S21 Ultra (SM-G998B/DS 256GB)

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Side by side comparison between Samsung Galaxy A72 vs Samsung Galaxy S21 Ultra phones, differences, pros, cons and full specifications. What's the better?

11/14/2021 3:07 PM, updated: 5/19/2025 11:26 AM

Compare Samsung Galaxy S21 Ultra X Samsung Galaxy A72 (SM-A725M/DS) 04Points

Specifications Compare Models Pictures

6.7"
AMOLED

1080x2400

64
MP

32mp

6GB
RAM

Octa-core

5000
mAh

(Non removable)

26Points Samsung Galaxy S21 Ultra (SM-G998B/DS 256GB) Compare Samsung Galaxy A72 X

Specifications Compare Models Pictures

6.8"
AMOLED

1440x3200

108
MP

40mp

12GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B/DS 256GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

4 Advantages Samsung Galaxy A72 (SM-A725M/DS)	vs	26 Advantages Samsung Galaxy S21 Ultra (SM-G998B/DS 256GB)
+Until 1TB microSD, microSDXC	vs	Not supported
+203 grams (7.11 ounces)12% Lighter	vs	227 grams (7.95 ounces)
+8.4 millimeters (0.33 inches)6% Thinner	vs	8.9 millimeters (0.35 inches)
+3.5mm jack	vs	Type-C reversible connector
2.3GHz 64bit Octa-core	vs	+2.9GHz 64bit Octa-core (5nm)
6GB LPDDR4X	vs	+12GB LPDDR5
128GB (102GB available)	vs	+256GB (220GB available)
UFS 2.1	vs	+UFS 3.1
Plastic body, glass front	vs	+Aluminum frame, glass front/backAdvantage More resistant material
Not supported	vs	+HDR10+
90Hz	vs	+120Hz
1080x2400 pixels	vs	+1440x3200 pixels78% Higher resolution screen
393 PPI	vs	+516 PPI
6.7"	vs	+6.8"1% Larger screen
(quad camera) 64MP + 8MP + 12MP + 5MP	vs	+(quad camera) 108MP + 10MP + 10MP + 12MP57% Higher resolution main camera
1/1.72" inches	vs	+1/1.33" inches
(front) 32MP	vs	+(front) 40MP
4K UHD (3840x2160)	vs	+8K UHD (7680x4320)
Android 14	vs	+Android 15Advantage Android 15 is newer and safer
4G LTE-A	vs	+5G SA/NSA
(4G LTE-A) 600 Mbps	vs	+(5G SA/NSA) 5000 Mbps
Not supported	vs	+Barometer
Not supported	vs	+Proximity sensor
Not supported	vs	+UWB (Ultra Wideband)
Not supported	vs	+Qi wireless charging (Qi/PMA)
2 slots (Dual-SIM) (hybrid slot/shares the same microSD slot)	vs	+2 slots (Dual-SIM) + e-SIM (Eletronic)
802.11 a/b/g/n/ac [wifi5]	vs	+802.11 a/b/g/n/ac/ax [wifi6]
Not supported	vs	+DLNA
5.0 + A2DP/LE	vs	+5.2 + A2DP/LE
USB 2.0 Type-C, USB OTG On-The-Go	vs	+USB 3.2 Type-C, USB OTG On-The-Go

32 Common items in both devices

Super AMOLED / Dynamic AMOLED

16 million

LED flash

Digital and optical zoom

PDAF: phase detection autofocus / PDAF: phase detection autofocus on both cameras

OIS: Optical stabilization

BSI sensor

+25 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Change model		Choose the model
Model	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Other model names	Galaxy A72 4G SM-A725M/Dual-SIM (128GB+6GB RAM)	Galaxy S21 Ultra 5G (SM-G998B/Dual-SIM)
Country or region available	(Latin America), Brazil, Chile, Uruguay	(Global, International)
Brand	Samsung	Samsung
Release date	3/26/2021, Announced: 3/17/2021	1/29/2021, Announced: 1/14/2021
Depth	8.4 millimeters (0.33 inches)	8.9 millimeters (0.35 inches)
Size (width x height)	77.4 x 165 millimeters (3.05 x 6.5 in)	75.6 x 165.1 millimeters (2.98 x 6.5 in)
Weight	203 grams (7.11 ounces)	227 grams (7.95 ounces)
Build, materials	Plastic body, glass front	Aluminum frame, glass front/back
Protection against water and others	IP67 certified: dust proof and waterproof over 1 meter and 30min	IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant
📲 Display
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Display type	Super AMOLED	Dynamic AMOLED
Screen size	6.7" inches	6.8" inches
Screen-to-body ratio	~84.9% (screen-to-body ratio)	~89.4% (screen-to-body ratio)
Display resolution	1080x2400 pixels (20:9)	1440x3200 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	393 PPI	516 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 5	Gorilla Glass Victus
Refresh rate	90Hz	120Hz
Display features	800nits[peak] Always-On Display	1500nits[peak] HDR10+ Always-On Display
🤖 Operating System
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
System version	Android 11	Android 11
Firmware update	Android 14	Android 15
User Interface	One UI 3.1 / 4.1 / 5.1 / 6.0	One UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0
⚙️ Processor
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Chipset	64bit: Qualcomm Snapdragon 720G SM7125 (8nm)	64bit: Samsung Exynos 2100 (5nm)
CPU	Octa-core, 2 processors: 2x 2.3GHz Kryo 465 Gold (Dual-core) 6x 1.8GHz Kryo 465 Silver (Hexa-core)	Octa-core, 3 processors: 1x 2.9GHz ARM Cortex-X1 (Single-core) 3x 2.8GHz ARM Cortex-A78 (Triple-core) 4x 2.2GHz ARM Cortex-A55 (Quad-core)
GPU graphical controller	Qualcomm Adreno 618	ARM Mali-G78 MP14 (854MHz)
Performance (benchmark)	AnTuTu: 279342 (v8) Geekbench: 6483 (v4.4), 1627 (v5.1) GFXBench: 15fps (ES 3.1 onscreen)	AnTuTu: 657150 (v8), 727634 (v9) Geekbench: 3457 (v5.2) GFXBench: 51fps (ES 3.1 onscreen)
💽 Memory and storage
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
RAM memory	6GB LPDDR4X	12GB LPDDR5
Internal storage	128GB (102GB available) UFS 2.1	256GB (220GB available) UFS 3.1
External storage	Until 1TB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)	Not supported
📶 Mobile networks
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Dual-SIM	Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot)	Dual-SIM Standby - Call active on one sim card
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM
Maximum Download / Upload	600/100 Mbps	5000/1920 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G, 5G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1700/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat12 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE	LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) VoLTE
Primary 5G network	Not supported	SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78)
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	UMTS 850/900/1700/1900/2100	UMTS 850/900/1700/1900/2100
Secondary 4G network	LTE Cat12 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE	LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) VoLTE
Secondary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
📷 Camera
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Back camera (main camera)	(quad camera) 64 megapixels 8MP telephoto f/2.41.0µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.2123°1.12µm 5MP macro f/2.4	(quad camera) 108 megapixels 10MP periscope telephoto f/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom 10MP telephoto f/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video
Main camera resolution	10120x6328 pixels	12000x9000 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	8K UHD (7680x4320) 24 fps
Flash	LED flash	LED flash
Focal aperture	f/1.8 (aperture)	f/1.8 (aperture)
Focal length	26mm (lens)	26mm (lens)
Sensor size	1/1.72" inches	1/1.33" inches
Pixel size	0.8µm pixel	1.8µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus on both cameras
Touch focus	Supported	Supported
Image stabilization	OIS: Optical stabilization	OIS: Optical stabilization
Zoom	Digital and optical zoom	Digital and optical zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Supported
HDR	HDR photo on both cameras	HDR photo/video on both cameras
Camera extras	feature not registered	4K@60fps 1080p@240fps 720p@960fps
📸 Front camera
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Front camera (secondary)	32 megapixels	40 megapixels
Front camera resolution	6528x4896 pixels	7296x5472 pixels
Video recording (secondary)	4K UHD (3840x2160)	4K UHD (3840x2160)
Front flash	Not supported	Not supported
Focal aperture	f/2.2 (aperture)	f/2.2 (aperture)
Focal length	26mm (lens)	26mm (lens)
Sensor size	1/2.8" inches	1/2.8" inches
Pixel size	0.8µm pixel	0.7µm pixel
🔉 Sound and multimedia
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Loudspeaker	Stereo sound with dual speakers	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG
Active noise cancellation	2 microphones or more	3 microphones
Radio	FM	FM
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD, MKV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
USB	USB 2.0 Type-C, USB OTG On-The-Go	USB 3.2 Type-C, USB OTG On-The-Go
Audio output	3.5mm jack	Type-C reversible connector
TV output	USB Type-C (reversible)	USB Type-C (reversible)
Bluetooth	5.0 + A2DP/LE	5.2 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Sensors	Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect	Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband)
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Battery type	LiPo: li-ion polymer (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	5000 mAh	5000 mAh
Charger, watts	25W Wired fast charging	25W Wired fast charging USB Power Delivery 3.0
Inductive / wireless charging	Not supported	15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging
Talk time autonomy	35 hours (1.5 days)	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder, Voice commands
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Awesome Black, White, Violet, Blue	• Colors: Phantom Black, Silver, Titanium, Navy, Brown • Samsung Pay (Visa, MasterCard) • Samsung DeX • Stylus pen support
☢️ Radiation rate
	Galaxy A72 (SM-A725M/DS)	Galaxy S21 Ultra (SM-G998B/DS 256GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	0.24W/kg (head), 0.72W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.714W/kg (head), 1.58W/kg (body)