Samsung Galaxy Z Fold 7 (SM-F966B/DS 512GB) vs Samsung Galaxy J7 Duo (SM-J720M/DS)

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Side by side comparison between Samsung Galaxy Z Fold 7 vs Samsung Galaxy J7 Duo phones, differences, pros, cons and full specifications. What's the better?

9/6/2025 4:54 PM, updated: 9/13/2025 8:28 PM

Compare Samsung Galaxy J7 Duo X Samsung Galaxy Z Fold 7 (SM-F966B/DS 512GB) 40Points

Specifications Compare Models Pictures

8"
AMOLED

1968x2184

200
MP

10mp

12GB
RAM

Octa-core

4400
mAh

(Non removable)

07Points Samsung Galaxy J7 Duo (SM-J720M/DS) Compare Samsung Galaxy Z Fold 7 X

Specifications Compare Models Pictures

5.5"
AMOLED

720x1280

13
MP

8mp

3GB
RAM

Octa-core

3000
mAh

(Removable)

What's the better phone? Samsung Galaxy Z Fold 7 (SM-F966B/DS 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!

40 Advantages Samsung Galaxy Z Fold 7 (SM-F966B/DS 512GB)	vs	7 Advantages Samsung Galaxy J7 Duo (SM-J720M/DS)
+4.47GHz 64bit Octa-core (3nm)160% More powerful processor, you can open your applications faster	vs	2.2GHz 64bit Octa-core (14nm)
+12GB LPDDR5X3 times More RAM memory. Typically more responsive and better for multitasking.	vs	3GB LPDDR4
+512GB (476GB available)22 times More internal storage for applications and files	vs	32GB (21GB available)
+UFS 4.0Advantage Fastest write and read storage.	vs	eMMC 5.1
+4.2 millimeters (0.17 inches)95% Thinner	vs	8.2 millimeters (0.32 inches)
+Aluminum frame, flexible plastic screen, glass backAdvantage More resistant material	vs	Plastic body, glass front
+HDR10+Advantage The HDR10+ display provides vibrant colors and more details	vs	Not supported
+120Hz100% The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.	vs	60Hz
+1968x2184 pixels4 times Higher resolution screen	vs	720x1280 pixels
+367 PPI37% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	267 PPI
+8"45% Larger screen	vs	5.5"
+(triple camera) 200MP + 10MP + 12MP11 times Higher resolution main camera	vs	(dual camera) 13MP + 5MP
+Digital and optical zoomAdvantage The zoom allows for better focus and approach to take pictures	vs	Only digital zoom
+OIS: Optical stabilizationAdvantage Image stabilization prevents blurry photos and helps in recording motion video	vs	EIS: Digital stabilization
+BSI sensorAdvantage The BSI sensor allows the entry of more light generating photos with more detail and brightness	vs	Not supported
+HDR photo/video and HDR photo on front cameraAdvantage The HDR technology produced photos with more detail in dark areas	vs	HDR photo only main camera
+f/1.7 (aperture)12% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.	vs	f/1.9 (aperture)
+(front) 10MP26% Higher resolution secondary camera to take pictures and selfies	vs	(front) 8MP
+8K UHD (7680x4320)15 times More image quality for recording videos with the primary camera	vs	Full HD (1920x1080)
+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera	vs	(front) Full HD (1920x1080)
+Android 16Advantage Android 16 is newer and safer	vs	Android 10
+5G Sub6Advantage The 5G Sub6 network is newer and faster	vs	4G LTE
+(5G Sub6) 5000 Mbps32 times Faster for surfing the internet and download files	vs	(4G LTE) 150 Mbps
+Ambient light sensorAdvantage Sensors help you use the device	vs	Not supported
+BarometerAdvantage Sensors help you use the device	vs	Not supported
+CompassAdvantage Sensors help you use the device	vs	Not supported
+GyroscopeAdvantage Sensors help you use the device	vs	Not supported
+UWB (Ultra Wideband)Advantage Sensors help you use the device	vs	Not supported
+4400 mAh47% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use	vs	3000 mAh
+Qi Wireless charging (Qi/WPC)Advantage Wireless charging is another way to charge the battery.	vs	Not supported
+2 slots (Dual-SIM) + e-SIM (Eletronic)Advantage You can have more mobile carriers/operators on the same device.	vs	2 slots (Dual-SIM) (dedicated slot)
+Stereo soundAdvantage Better sound quality for listening to music or clearer hands-free calls	vs	Mono sound (not stereo)
+Active noise cancellationAdvantage More noise-canceling microphones allow for better quality in calls and audio for recorded videos	vs	Not supported
+802.11 a/b/g/n/ac/ax/be [wifi7/6E/6]Advantage WiFi 802.11 a/b/g/n/ac/ax/be [wifi7/6E/6] is newer and faster	vs	802.11 a/b/g/n/ac [wifi5]
+DLNAAdvantage With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.	vs	Not supported
+5.4 + A2DP/LEAdvantage Bluetooth 5.4 + A2DP/LE is newer and faster	vs	5.0 + A2DP/LE
+NFCAdvantage NFC allows you to make payments by approach quickly and securely	vs	Not supported
+USB 3.2 Type-C, USB OTG On-The-GoAdvantage Newer and faster USB version for transferring photos, mp3 or data.	vs	MicroUSB 2.0
+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.	vs	MicroUSB 2.0
+IP48 certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
Not supported	vs	+Until 256GB microSD, microSDXCAdvantage More external storage for files using memory cards
215 grams (7.53 ounces)	vs	+174 grams (6.09 ounces)24% Lighter
LED flash	vs	+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light
Not supported	vs	+ANT+Advantage Sensors help you use the device
LiPo: li-ion polymer (Non removable)	vs	+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily
Type-C reversible connector	vs	+3.5mm jackAdvantage Headsets with 3.5mm Jack size are more common and easy to find in stores
Not supported	vs	+FMAdvantage The radio lets you listen to your songs and sports in general

14 Common items in both devices

LTPO AMOLED / Super AMOLED

16 million

PDAF: phase detection autofocus / Autofocus

Capacitive

Multitouch

Accelerometer

Face unlock 2D

+7 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 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Change model		Choose the model
Model	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Other model names	Galaxy Z Fold7 SM-F966B/Dual-SIM	Galaxy J7 Duo J720M/Dual-Sim, Samsung J720
Country or region available	(Global, International)	(Latin America), Brazil
Brand	Samsung	Samsung
Release date	7/25/2025, Announced: 7/9/2025	4/1/2018
Depth	4.2 millimeters (0.17 inches)	8.2 millimeters (0.32 inches)
Size (width x height)	143.2 x 1584 millimeters (5.64 x 62.36 in)	77.2 x 153.5 millimeters (3.04 x 6.04 in)
Weight	215 grams (7.53 ounces)	174 grams (6.09 ounces)
Build, materials	Aluminum frame, flexible plastic screen, glass back Back: Gorilla Glass Victus 2 Folded: 8.9 mm x 72.8 x 158.4	Plastic body, glass front
Protection against water and others	IP48 certified: dust and water resistant (dust > 1mm; immersible up to 1.5m for 30 min)	Not supported
📲 Display
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Display type	LTPO AMOLED	Super AMOLED
Screen size	8" inches	5.5" inches
Screen-to-body ratio	~9.1% (screen-to-body ratio)	~70.4% (screen-to-body ratio)
Display resolution	1968x2184 pixels	720x1280 pixels (16:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	367 PPI	267 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Not supported
Refresh rate	120Hz	60Hz
Display features	2600nits[peak] HDR10+ Always-On Display Extra display: Dynamic 2X LTPO AMOLED 6.5" (1080x2520), 120Hz, Gorilla Glass Victus 2	Not supported
🤖 Operating System
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
System version	Android 16	Android 8.0 Oreo
Firmware update	feature not registered	Android 10
User Interface	One UI 8	One UI 2.0
⚙️ Processor
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Chipset	64bit: Qualcomm Snapdragon 8 Elite (SM8750-AC) (3nm)	64bit: Samsung Exynos 7885 (14nm)
CPU	Octa-core, 2 processors: 2x 4.47GHz Oryon V2 Phoenix L (Dual-core) 6x 3.53GHz Oryon V2 Phoenix M (Hexa-core)	Octa-core, 2 processors: 2x 2.2GHz ARM Cortex-A73 (Dual-core) 6x 1.6GHz ARM Cortex-A53 (Hexa-core)
GPU graphical controller	Qualcomm Adreno 830 (1200MHz)	ARM Mali-G71 MP2
Performance (benchmark)	AnTuTu: 1995920 (v10) Geekbench: 9152 (v6)	AnTuTu: 98104 (v7)
💽 Memory and storage
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
RAM memory	12GB LPDDR5X	3GB LPDDR4
Internal storage	512GB (476GB available) UFS 4.0	32GB (21GB available) eMMC 5.1
External storage	Not supported	Until 256GB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Dual-SIM	Dual-SIM Standby - Call active on one sim card	Dual-SIM Standby - Call active on one sim card (dedicated slot)
SIM card	2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM	2 slots (Dual-SIM) micro-SIM (3FF)
Maximum Download / Upload	5000/1024 Mbps	150/50 Mbps
Network technology	2G, 3G, 4G, 5G	2G, 3G, 4G
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 Cat (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	LTE Cat4 (1, 3, 4, 5, 7, 8, 12, 13, 17, 28, 66) TD-LTE (38, 40, 41)
Primary 5G network	SA/NSA/Sub6 (1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 66, 77, 78)	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
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 Cat (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	Not supported
Secondary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+
📷 Camera
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Back camera (main camera)	(triple camera) 200 megapixels 10MP telephoto f/2.467mm1.0µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.2120°1.4µmPDAF	(dual camera) 13 megapixels 5MP depth f/1.9
Main camera resolution	20000x10000 pixels	4128x3096 pixels
Video recording (primary)	8K UHD (7680x4320) 30 fps	Full HD (1920x1080) 30 fps
Flash	LED flash	LED flash on both cameras
Focal aperture	f/1.7 (aperture)	f/1.9 (aperture)
Focal length	24mm (lens)	feature not registered
Sensor size	1/1.3" inches	feature not registered
Pixel size	0.6µm pixel	feature not registered
Autofocus	PDAF: phase detection autofocus	Autofocus
Touch focus	Supported	Supported
Image stabilization	OIS: Optical stabilization	EIS: Digital stabilization
Zoom	Digital and optical zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Not supported
HDR	HDR photo/video and HDR photo on front camera	HDR photo only main camera
Camera extras	8K@30fps 4K@60fps 1080p@60/120/240fps 720p@960fps 10-bit HDR HDR10+ Extra cover camera: 10MP wide (f/2.2 24mm 1.12µm)	feature not registered
📸 Front camera
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Front camera (secondary)	10 megapixels	8 megapixels
Front camera resolution	3872x2592 pixels	3264x2448 pixels
Video recording (secondary)	4K UHD (3840x2160)	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	f/2.2 (aperture)	f/1.9 (aperture)
Focal length	18mm (lens)	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	1.12µm pixel	feature not registered
🔉 Sound and multimedia
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Loudspeaker	Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG	Mono sound (not stereo)
Active noise cancellation	3 microphones	Not supported
Radio	Not supported	FM
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD, MKV	MP4, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
USB	USB 3.2 Type-C, USB OTG On-The-Go	MicroUSB 2.0
Audio output	Type-C reversible connector	3.5mm jack
TV output	USB Type-C (reversible)	Not supported
Bluetooth	5.4 + A2DP/LE	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac/ax/be [wifi7/6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, QZSS	A-GPS, GeoTagging, GLONASS, BeiDou
NFC	Supported	Not supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Sensors	Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor UWB (Ultra Wideband)	Accelerometer ANT+ Face unlock 2D Fingerprint sensor (front-mounted) Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Battery type	LiPo: li-ion polymer (Non removable)	Li-Ion: lithium-ion (Removable)
Battery capacity	4400 mAh	3000 mAh
Charger, watts	25W Wired fast charging	Wired charging
Inductive / wireless charging	15W Qi Wireless charging (Qi/WPC) 4.5W Reverse wireless charging	Not supported
Talk time autonomy	feature not registered	20 hours
Standby	feature not registered	feature not registered
➕ Other features
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
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: Blue Shadow, Silver Shadow, Jet Black, Mint Samsung DeX	• Colors: Black, Gold, Rose Gold, White • Samsung Pay
☢️ Radiation rate
	Galaxy Z Fold 7 (SM-F966B/DS 512GB)	Galaxy J7 Duo (SM-J720M/DS)
SAR 1.6W/kg (USA, Mexico, etc.)	1.21W/kg (head), 1.26W/kg (body)	0.97W/kg (head), 0.55W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	1.418W/kg (head), 1.242W/kg (body)	feature not registered