Asus Zenfone 3 Ultra (ZU680KL 32GB) vs Samsung Galaxy C8 (SM-C7100 64GB)

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Side by side comparison between Asus Zenfone 3 Ultra vs Samsung Galaxy C8 phones, differences, pros, cons and full specifications. What's the better?

7/18/2018 10:04 PM, updated: 6/6/2025 11:25 AM

Compare Samsung Galaxy C8 X Asus Zenfone 3 Ultra (ZU680KL 32GB) 10Points

Specifications Compare Models Pictures

6.8"
IPS+

1080x1920

23
MP

8mp

3GB
RAM

Octa-core

4600
mAh

(Non removable)

10Points Samsung Galaxy C8 (SM-C7100 64GB) Compare Asus Zenfone 3 Ultra X

Specifications Compare Models Pictures

5.5"
AMOLED

1080x1920

13
MP

16mp

4GB
RAM

Octa-core

3000
mAh

(Non removable)

What's the better phone? Samsung Galaxy C8 (SM-C7100 64GB)

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!

10 Advantages Asus Zenfone 3 Ultra (ZU680KL 32GB)	vs	10 Advantages Samsung Galaxy C8 (SM-C7100 64GB)
+6.8 millimeters (0.27 inches)16% Thinner	vs	7.9 millimeters (0.31 inches)
+6.8"24% Larger screen	vs	5.5"
+(back) 23MP29% Higher resolution main camera	vs	(dual camera) 13MP + 5MP
+OIS (4-axis): Optical stabilizationAdvantage Image stabilization prevents blurry photos and helps in recording motion video	vs	EIS: Digital stabilization
+HDR photo on both camerasAdvantage The HDR technology produced photos with more detail in dark areas	vs	HDR photo only main camera
+4K UHD (3840x2160)3 times More image quality for recording videos with the primary camera	vs	Full HD (1920x1080)
+4600 mAh53% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use	vs	3000 mAh
+802.11 a/b/g/n/ac [wifi5]Advantage WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster	vs	802.11 b/g/n [wifi4]
+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.	vs	MicroUSB 2.0, USB OTG On-The-Go
+Gorilla Glass 4Advantage Protection against scratches on the screen lets you carry your phone with your keys	vs	Not supported
1.8GHz 64bit Octa-core	vs	+2.6GHz 64bit Octa-core (16nm)38% More powerful processor, you can open your applications faster
3GB LPDDR4	vs	+4GB LPDDR4X33% More RAM memory. Typically more responsive and better for multitasking.
32GB (24GB available)	vs	+64GB (51GB available)113% More internal storage for applications and files
233 grams (8.16 ounces)	vs	+180 grams (6.3 ounces)29% Lighter
TFT Super IPS+	vs	+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid
324 PPI	vs	+401 PPI24% Crisper display of text, images and videos because it has more pixels per inch (ppi)
Dual-LED flash	vs	+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light
f/2.0 (aperture)	vs	+f/1.7 (aperture)18% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 8MP	vs	+(front) 16MP99% Higher resolution secondary camera to take pictures and selfies
Android 8.0 Oreo	vs	+Android 8.1 OreoAdvantage Android 8.1 Oreo is newer and safer

28 Common items in both devices

Until 256GB microSD, microSDXC

16 million

1080x1920 pixels

Only digital zoom

LDAF/PDAF: laser/phase detection autofocus / Autofocus

(front) Full HD (1920x1080)

4G LTE-A

+21 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
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Change model		Choose the model
Model	Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Other model names	Asus Zenfone 3 Ultra 3GB/32GB ZU680KL Dual-Sim, Asus Mercury	盖乐世 C8 4GB RAM + 64GB, SM-C7100ZKGCHC
Country or region available	(Global, International)	China, Hong Kong
Brand	Asus	Samsung
Release date	8/1/2016	9/1/2017
Depth	6.8 millimeters (0.27 inches)	7.9 millimeters (0.31 inches)
Size (width x height)	93.9 x 186.4 millimeters (3.7 x 7.34 in)	74.7 x 152.4 millimeters (2.94 x 6 in)
Weight	233 grams (8.16 ounces)	180 grams (6.3 ounces)
Build, materials	feature not registered	Aluminum body, glass front
Protection against water and others	Not supported	Not supported
📲 Display
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Display type	TFT Super IPS+	Super AMOLED
Screen size	6.8" inches	5.5" inches
Screen-to-body ratio	~72.8% (screen-to-body ratio)	~73.3% (screen-to-body ratio)
Display resolution	1080x1920 pixels	1080x1920 pixels
Touchscreen	Capacitive Multitouch 10-points	Capacitive Multitouch
Pixel density (dot pitch)	324 PPI	401 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 4	Not supported
Refresh rate	feature not registered	60Hz
Display features	feature not registered	Always-On Display
🤖 Operating System
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
System version	Android 6.0.1 Marshmallow	Android 7.1.1 Nougat
Firmware update	Android 8.0 Oreo	Android 8.1 Oreo
User Interface	feature not registered	feature not registered
⚙️ Processor
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Chipset	64bit: Qualcomm Snapdragon 652 MSM8976 (28nm)	64bit: MediaTek Helio P25 (MT6757T) (16nm)
CPU	Octa-core, 2 processors: 4x 1.8GHz ARM Cortex-A72 (Quad-core) 4x 1.4GHz ARM Cortex-A53 (Quad-core)	Octa-core, 2 processors: 4x 2.6GHz ARM Cortex-A53 (Quad-core) 4x 1.6GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	Qualcomm Adreno 510 600Mhz	ARM Mali-T880 MP2 (1GHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
RAM memory	3GB LPDDR4	4GB LPDDR4X
Internal storage	32GB (24GB available)	64GB (51GB available) eMMC 5.1
External storage	Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)	Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)
📶 Mobile networks
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
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 (hybrid slot/shares the same microSD slot)
SIM card	2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	300/50 Mbps	300/50 Mbps
Network technology	2G, 3G, 4G	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	CDMA 800, GSM 850/900/1800/1900
Primary 3G network	Global version: UMTS 800/850/900/1900/2100 China version: CDMA2000, TD-SCDMA 1900/2000 UMTS 800/850/900/1900/2100	CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1900/2100
Primary 4G network	LTE Cat6 Global version: LTE (Bands 1,3,5,7,8,18,19,20,26,28) TD-LTE (Bands 38,40,41) China version: LTE (Bands 1,3,5,7,8,18,19,20,26,28) TD-LTE (Bands 38,39,40,41)	LTE Cat6 (Bands 1, 3, 5, 7, 8) TD-LTE (Bands 38, 39, 40, 41)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	GPRS, EDGE	GPRS, EDGE
📷 Camera
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Back camera (main camera)	23 megapixels	(dual camera) 13 megapixels 5MP f/1.9
Main camera resolution	5520x4140 pixels	4128x3096 pixels
Video recording (primary)	4K UHD (3840x2160) 24 fps	Full HD (1920x1080) 30 fps
Flash	Dual-LED flash	LED flash on both cameras
Focal aperture	f/2.0 (aperture)	f/1.7 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	1/2.6" inches	feature not registered
Pixel size	1.12µm pixel	feature not registered
Autofocus	LDAF/PDAF: laser/phase detection autofocus	Autofocus
Touch focus	Supported	Supported
Image stabilization	OIS (4-axis): Optical stabilization	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Not supported
HDR	HDR photo on both cameras	HDR photo only main camera
Camera extras	feature not registered	feature not registered
📸 Front camera
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Front camera (secondary)	8 megapixels	16 megapixels
Front camera resolution	3264x2448 pixels	4608x3456 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	f/2.0 (aperture)	f/1.9 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Loudspeaker	Supported	Mono sound (not stereo)
Active noise cancellation	2 microphones or more	2 microphones
Radio	FM (RDS)	FM
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263	MP4, H.265, H.264, H.263, MKV
Audio formats	MP3, WAV, eAAC+, FLAC	MP3, OGG, eAAC+, FLAC
🔌 Connectivity
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
USB	USB 2.0 Type-C reversible connector	MicroUSB 2.0, USB OTG On-The-Go
Audio output	3.5mm jack	3.5mm jack
TV output	USB Type-C SlimPort®	Not supported
Bluetooth	4.2 + A2DP	4.2 + A2DP
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot	802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, BeiDou	A-GPS, GeoTagging, GLONASS
NFC	Not supported	Not supported
Infrared port	Supported	Not supported
🧭 Sensors
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Sensors	Accelerometer Ambient light sensor Compass Fingerprint sensor Gyroscope Hall effect Proximity sensor	Accelerometer Ambient light sensor Compass Fingerprint sensor (front-mounted) Gyroscope Hall effect Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Battery type	Li-Ion: lithium-ion (Non removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	4600 mAh	3000 mAh
Charger, watts	18W (9V/2A) Wired fast charging	Wired charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	34 hours (1.4 days)	16 hours
Standby	feature not registered	feature not registered
➕ Other features
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
Call control	Voice dialing, Voice recorder	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: Titanium Gray, Glacier Silver, Rose Gold • USB OTG On-The-Go • Asus ZenUI 3.0 • Sony IMX318 sensor camera • DTS headphone • Hi-Res audio 192kHz/24bit • Quick Charge 3.0 • Fast charging battery: 60% in 45min • Miracast	• Colors: Black, Gold, Pink
☢️ Radiation rate
	Asus Zenfone 3 Ultra (ZU680KL 32GB)	Galaxy C8 (SM-C7100 64GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.719W/kg (head), 1.26W/kg (body)