Samsung Galaxy Z Fold 2 (SM-F9160) vs Samsung Galaxy S21 Ultra (SM-G998U1 512GB)

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Side by side comparison between Samsung Galaxy Z Fold 2 vs Samsung Galaxy S21 Ultra phones, differences, pros, cons and full specifications. What's the better?

11/14/2021 5:18 PM, updated: 5/19/2025 11:26 AM

Compare Samsung Galaxy S21 Ultra X Samsung Galaxy Z Fold 2 (SM-F9160) 02Points

Specifications Compare Models Pictures

7.6"
AMOLED

1768x2208

12.2
MP

10mp

12GB
RAM

Octa-core

4500
mAh

(Non removable)

17Points Samsung Galaxy S21 Ultra (SM-G998U1 512GB) Compare Samsung Galaxy Z Fold 2 X

Specifications Compare Models Pictures

6.8"
AMOLED

1440x3200

108
MP

40mp

16GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 Ultra (SM-G998U1 512GB)

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!

2 Advantages Samsung Galaxy Z Fold 2 (SM-F9160)	vs	17 Advantages Samsung Galaxy S21 Ultra (SM-G998U1 512GB)
+6.9 millimeters (0.27 inches)29% Thinner	vs	8.9 millimeters (0.35 inches)
+7.6"12% Larger screen	vs	6.8"
3.09GHz 64bit Octa-core (7nm)	vs	+2.84GHz 64bit Octa-core (5nm)6% More powerful processor, you can open your applications faster
12GB LPDDR5	vs	+16GB LPDDR533% More RAM memory. Typically more responsive and better for multitasking.
282 grams (9.87 ounces)	vs	+227 grams (7.95 ounces)24% Lighter
1768x2208 pixels	vs	+1440x3200 pixels18% Higher resolution screen
372 PPI	vs	+516 PPI39% Crisper display of text, images and videos because it has more pixels per inch (ppi)
(triple camera) 12.2MP + 12MP + 12MP	vs	+(quad camera) 108MP + 10MP + 10MP + 12MP3 times Higher resolution main camera
1/1.76" inches	vs	+1/1.33" inches32% The larger sensor camera lets you take photos with better depth.
(front) 10MP	vs	+(front) 40MP3 times Higher resolution secondary camera to take pictures and selfies
4K UHD (3840x2160)	vs	+8K UHD (7680x4320)3 times More image quality for recording videos with the primary camera
Android 13	vs	+Android 15Advantage Android 15 is newer and safer
(5G Sub6) 3000 Mbps	vs	+(5G Sub6) 5000 Mbps67% Faster for surfing the internet and download files
4500 mAh	vs	+5000 mAh11% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)	vs	+1 slot (Single-SIM) + e-SIM (Eletronic)Advantage You can have more mobile carriers/operators on the same device.
Not supported	vs	+FMAdvantage The radio lets you listen to your songs and sports in general
5.0 + A2DP/LE	vs	+5.2 + A2DP/LEAdvantage Bluetooth 5.2 + A2DP/LE is newer and faster
Not supported	vs	+Gorilla Glass VictusAdvantage Protection against scratches on the screen lets you carry your phone with your keys
Not supported	vs	+IP68 certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

42 Common items in both devices

512GB (455GB available) / 512GB (457GB available)

UFS 3.1

Aluminum frame, flexible plastic screen, glass back / Aluminum frame, glass front/back

Flexible Super AMOLED / Dynamic AMOLED

HDR10+

120Hz

16 million

+35 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 Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Change model		Choose the model
Model	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Other model names	Galaxy Fold2 5G SM-F9160ZNETGY (512GB + 12GB RAM)	Galaxy S21 Ultra 5G (SM-G998U1) Unlocked
Country or region available	China, Hong Kong	USA
Brand	Samsung	Samsung
Release date	9/18/2020, Announced: 8/5/2020	1/29/2021, Announced: 1/14/2021
Depth	6.9 millimeters (0.27 inches)	8.9 millimeters (0.35 inches)
Size (width x height)	128.2 x 159.2 millimeters (5.05 x 6.27 in)	75.6 x 165.1 millimeters (2.98 x 6.5 in)
Weight	282 grams (9.87 ounces)	227 grams (7.95 ounces)
Build, materials	Aluminum frame, flexible plastic screen, glass back	Aluminum frame, glass front/back
Protection against water and others	Not supported	IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant
📲 Display
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Display type	Flexible Super AMOLED	Dynamic AMOLED
Screen size	7.6" inches	6.8" inches
Screen-to-body ratio	~89.1% (screen-to-body ratio)	~89.4% (screen-to-body ratio)
Display resolution	1768x2208 pixels	1440x3200 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	372 PPI	516 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Gorilla Glass Victus
Refresh rate	120Hz	120Hz
Display features	HDR10+ Extra display: Super AMOLED 6.23" (816x2260) Gorilla Glass Victus	1500nits[peak] HDR10+ Always-On Display
🤖 Operating System
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
System version	Android 10	Android 11
Firmware update	Android 13	Android 15
User Interface	One UI 3.1 / 4.1 / 5.0	One UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0
⚙️ Processor
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Chipset	64bit: Qualcomm Snapdragon 865+ (SM8250-AB) (7nm)	64bit: Qualcomm Snapdragon 888 (SM8350) (5nm)
CPU	Octa-core, 3 processors: 1x 3.09GHz Kryo 585 (Single-core) 3x 2.42GHz Kryo 585 (Triple-core) 4x 1.8GHz Kryo 585 (Quad-core)	Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core)
GPU graphical controller	Qualcomm Adreno 650 (250-646MHz)	Qualcomm Adreno 660 (840MHz)
Performance (benchmark)	AnTuTu: 564907 (v8) Geekbench: 12607 (v4.4), 2715 (v5.1) GFXBench: 33fps (ES 3.1 onscreen)	AnTuTu: 681099 (v8), 809165 (v9) Geekbench: 3539 (v5.2) GFXBench: 54fps (ES 3.1 onscreen)
💽 Memory and storage
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
RAM memory	12GB LPDDR5	16GB LPDDR5
Internal storage	512GB (455GB available) UFS 3.1	512GB (457GB available) UFS 3.1
External storage	Not supported	Not supported
📶 Mobile networks
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card
SIM card	1 slot (Single-SIM) nano-SIM (4FF)	1 slot (Single-SIM) nano-SIM (4FF) + e-SIM
Maximum Download / Upload	3000/1024 Mbps	5000/1920 Mbps
Network technology	2G, 3G, 4G, 5G	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	CDMA 800/1900, GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1900/2100	CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 25, 26, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE	LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE
Primary 5G network	SA/NSA/Sub6 (1, 3, 28, 41, 78, 79)	SA/NSA/Sub6 (2, 5, 25, 41, 66, 71) mmWave (260, 261)
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
Secondary 2G network	Not supported	CDMA 800/1900, GSM 850/900/1800/1900
Secondary 3G network	Not supported	CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100
Secondary 4G network	Not supported	LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE
Secondary data network	Not supported	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
📷 Camera
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Back camera (main camera)	(triple camera) 12.2 megapixels 12MP telephoto f/2.452mm1/3.6"1.0µmPDAFOIS2x-optical-zoom 12MP ultrawide f/2.2123°12mm1.12µm	(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	4032x3024 pixels	12000x9000 pixels
Video recording (primary)	4K UHD (3840x2160) 60 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	1/1.76" inches	1/1.33" inches
Pixel size	1.8µm 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/video on both cameras	HDR photo/video on both cameras
Camera extras	Cover camera: 10MP (f/2.2) 4K@30/60fps 1080p@60fps 1080p@240fps (slow motion) 720p@960fps (slow motion)	4K@60fps 1080p@240fps 720p@960fps
📸 Front camera
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Front camera (secondary)	10 megapixels	40 megapixels
Front camera resolution	3872x2592 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	1/3" inches	1/2.8" inches
Pixel size	1.22µm pixel	0.7µm pixel
🔉 Sound and multimedia
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Loudspeaker	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG
Active noise cancellation	2 microphones or more	3 microphones
Radio	Not supported	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 Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
USB	USB 3.2 Type-C, USB OTG On-The-Go	USB 3.2 Type-C, USB OTG On-The-Go
Audio output	Type-C reversible connector	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/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	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 Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Sensors	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband)	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband)
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
Battery type	LiPo: li-ion polymer (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	4500 mAh	5000 mAh
Charger, watts	25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0	25W Wired fast charging USB Power Delivery 3.0
Inductive / wireless charging	11W Qi Wireless charging (Qi/WPC) 4.5W Reverse wireless charging	15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging
Talk time autonomy	31 hours (1.3 days)	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
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: Mystic Bronze, Mystic Black • Bixby • Samsung DeX • Samsung Pay (MST, NFC)	• Colors: Phantom Black, Silver, Titanium, Navy, Brown • Samsung Pay (Visa, MasterCard) • Samsung DeX • Stylus pen support
☢️ Radiation rate
	Galaxy Z Fold 2 (SM-F9160)	Galaxy S21 Ultra (SM-G998U1 512GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	0.77W/kg (head), 1.02W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	0.829W/kg (head), 1.453W/kg (body)	feature not registered