Asus Zenfone 3 (5.2 ZE520KL 16GB) vs Fairphone 4 (128GB)

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Side by side comparison between Asus Zenfone 3 vs Fairphone 4 phones, differences, pros, cons and full specifications. What's the better?

3/10/2023 6:43 AM, updated: 6/5/2025 5:18 AM

Compare Fairphone 4 X Asus Zenfone 3 (5.2 ZE520KL 16GB) 06Points

Specifications Compare Models Pictures

5.2"
IPS+

1080x1920

16
MP

8mp

2GB
RAM

Octa-core

2650
mAh

(Non removable)

23Points Fairphone 4 (128GB) Compare Asus Zenfone 3 X

Specifications Compare Models Pictures

6.3"
IPS

1080x2340

48
MP

25mp

6GB
RAM

Octa-core

3905
mAh

(Removable)

What's the better phone? Fairphone 4 (128GB)

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!

6 Advantages Asus Zenfone 3 (5.2 ZE520KL 16GB)	vs	23 Advantages Fairphone 4 (128GB)
+144 grams (5.04 ounces)56% Lighter	vs	225 grams (7.88 ounces)
+7.7 millimeters (0.3 inches)36% Thinner	vs	10.5 millimeters (0.41 inches)
+Aluminum body, glass front, plastic backAdvantage More resistant material	vs	Plastic body, glass front
+424 PPI4% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	409 PPI
+3.5mm jackAdvantage Headsets with 3.5mm Jack size are more common and easy to find in stores	vs	Type-C reversible connector
+FM (RDS)Advantage The radio lets you listen to your songs and sports in general	vs	Not supported
2GHz 64bit Octa-core (14nm)	vs	+2.2GHz 64bit Octa-core (8nm)10% More powerful processor, you can open your applications faster
2GB LPDDR3	vs	+6GB LPDDR4X2 times More RAM memory. Typically more responsive and better for multitasking.
16GB (10GB available)	vs	+128GB (104GB available)9 times More internal storage for applications and files
eMMC 5.1	vs	+UFS 2.1Advantage Fastest write and read storage.
Until 256GB microSD, microSDXC	vs	+Until 1TB microSD, microSDXC3 times More external storage for files using memory cards
1080x1920 pixels	vs	+1080x2340 pixels22% Higher resolution screen
5.2"	vs	+6.3"21% Larger screen
(back) 16MP	vs	+(dual camera) 48MP + 48MP5 times Higher resolution main camera
Not supported	vs	+BSI sensorAdvantage The BSI sensor allows the entry of more light generating photos with more detail and brightness
f/2.0 (aperture)	vs	+f/1.6 (aperture)25% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 8MP	vs	+(front) 25MP2 times Higher resolution secondary camera to take pictures and selfies
Android 8.0 Oreo	vs	+Android 13Advantage Android 13 is newer and safer
4G LTE	vs	+5G Sub6Advantage The 5G Sub6 network is newer and faster
(4G LTE) 150 Mbps	vs	+(5G Sub6) 3000 Mbps19 times Faster for surfing the internet and download files
Not supported	vs	+Face unlock 2DAdvantage Sensors help you use the device
2650 mAh	vs	+3905 mAh47% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
Li-Ion: lithium-ion (Non removable)	vs	+LiPo: li-ion polymer (Removable)Advantage Removable battery can be replaced easily
10W	vs	+20W100% More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
2 slots (Dual-SIM) (hybrid slot/shares the same microSD slot)	vs	+2 slots (Dual-SIM) (dedicated slot)Advantage You can have more mobile carriers/operators on the same device.
4.2 + A2DP	vs	+5.1 + A2DP/LEAdvantage Bluetooth 5.1 + A2DP/LE is newer and faster
Not supported	vs	+NFCAdvantage NFC allows you to make payments by approach quickly and securely
USB 2.0 Type-C, USB OTG On-The-Go	vs	+USB 3.1 Type-C, USB OTG On-The-GoAdvantage Newer and faster USB version for transferring photos, mp3 or data.
Not supported	vs	+IP54 certified, MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

27 Common items in both devices

TFT Super IPS+ / TFT IPS LCD

60Hz

16 million

Dual-LED flash

Only digital zoom

LDAF/PDAF: laser/phase detection autofocus / PDAF: phase detection autofocus

OIS (4-axis): Optical stabilization / OIS: Optical stabilization

+20 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 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Change model		Choose the model
Model	Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Other model names	Zenfone 3 ZE520KL 2GB/16GB 5.2" Dual-SIM 1A090BR	Fairphone 4 (6GB RAM)
Country or region available	(Global, International), Brazil, China, Philippines, India	(Europe)
Brand	Asus	Fairphone
Release date	7/12/2016	10/25/2021, Announced: 9/30/2021
Depth	7.7 millimeters (0.3 inches)	10.5 millimeters (0.41 inches)
Size (width x height)	73.98 x 146.87 millimeters (2.91 x 5.78 in)	75.5 x 162 millimeters (2.97 x 6.38 in)
Weight	144 grams (5.04 ounces)	225 grams (7.88 ounces)
Build, materials	Aluminum body, glass front, plastic back	Plastic body, glass front
Protection against water and others	Not supported	IP54 certified: protection against dust and splashing. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
📲 Display
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Display type	TFT Super IPS+	TFT IPS LCD
Screen size	5.2" inches	6.3" inches
Screen-to-body ratio	~68.6% (screen-to-body ratio)	~79.7% (screen-to-body ratio)
Display resolution	1080x1920 pixels (16:9)	1080x2340 pixels (19.5:9)
Touchscreen	Capacitive Multitouch 10-points	Capacitive Multitouch
Pixel density (dot pitch)	424 PPI	409 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 3	Gorilla Glass 5
Refresh rate	60Hz	60Hz
Display features	2.5D glass	Not supported
🤖 Operating System
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
System version	Android 6.0.1 Marshmallow	Android 11
Firmware update	Android 8.0 Oreo	Android 13
User Interface	ZenUI 3.0	feature not registered
⚙️ Processor
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Chipset	64bit: Qualcomm Snapdragon 625 (MSM8953) (14nm)	64bit: Qualcomm Snapdragon 750G (SM7225) (8nm)
CPU	Octa-core, 1 processor: 8x 2GHz ARM Cortex-A53 (Octa-core)	Octa-core, 2 processors: 2x 2.2GHz Kryo 570 (Dual-core) 6x 1.8GHz Kryo 570 (Hexa-core)
GPU graphical controller	Qualcomm Adreno 506 (650MHz)	Qualcomm Adreno 619 (800MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
RAM memory	2GB LPDDR3	6GB LPDDR4X
Internal storage	16GB (10GB available) eMMC 5.1	128GB (104GB available) UFS 2.1
External storage	Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)	Until 1TB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
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 (dedicated slot)
SIM card	2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	150/50 Mbps	3000/1024 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	Global: UMTS 850/900/1900/2100 India: UMTS 850/900/2100 Brazil: UMTS 850/900/1700/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat4 Global: LTE (1, 2, 3, 5, 7, 8, 20) India: LTE (1, 3, 5, 8) TD-LTE (40) Brazil: LTE (1, 2, 3, 4, 5, 7, 8, 17, 28)	LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 18, 19, 20, 28, 32, 71) TD-LTE (38, 40, 41) VoLTE
Primary 5G network	Not supported	SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 41, 71, 77, 78)
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Global: UMTS 850/900/1900/2100 India: UMTS 850/900/2100 Brazil: UMTS 850/900/1700/1900/2100	UMTS 850/900/1700/1900/2100
Secondary 4G network	Not supported	LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 18, 19, 20, 28, 32, 71) TD-LTE (38, 40, 41) VoLTE
Secondary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
📷 Camera
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Back camera (main camera)	16 megapixels	(dual camera) 48 megapixels 48MP ultrawide f/2.21/2"0.8µmPDAF+TOF3D
Main camera resolution	4608x3456 pixels	8000x6000 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	4K UHD (3840x2160) 30 fps
Flash	Dual-LED flash	Dual-LED flash
Focal aperture	f/2.0 (aperture)	f/1.6 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/2" inches
Pixel size	feature not registered	0.8µm pixel
Autofocus	LDAF/PDAF: laser/phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	OIS (4-axis): Optical stabilization	OIS: Optical stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Supported
HDR	HDR photo on both cameras	HDR photo on both cameras
Camera extras	4K@30fps 1080p@30/60fps	4K@30fps 1080p@30/60fps
📸 Front camera
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Front camera (secondary)	8 megapixels	25 megapixels
Front camera resolution	3264x2448 pixels	5760x4320 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	Not supported
Focal aperture	f/2.0 (aperture)	f/2.2 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/2.78" inches
Pixel size	feature not registered	0.9µm pixel
🔉 Sound and multimedia
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Loudspeaker	Mono sound (not stereo) 24-bit/192kHz	Mono sound (not stereo)
Active noise cancellation	2 microphones or more	2 microphones
Radio	FM (RDS)	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
USB	USB 2.0 Type-C, USB OTG On-The-Go	USB 3.1 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 SlimPort®
Bluetooth	4.2 + A2DP	5.1 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFC	Not supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Sensors	Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Hall effect Proximity sensor	Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
Battery type	Li-Ion: lithium-ion (Non removable)	LiPo: li-ion polymer (Removable)
Battery capacity	2650 mAh	3905 mAh
Charger, watts	10W (5V/2A) Wired charging	20W Wired fast charging
Inductive / wireless charging	Not supported	Not supported
Talk time autonomy	feature not registered	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
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: Sapphire Black, Moonlight White, Shimmer Gold	• Colors: Gray, Green, Speckled Green • Modular phone with swappable components • iFixit: 10/10
☢️ Radiation rate
	Asus Zenfone 3 (5.2 ZE520KL 16GB)	Fairphone 4 (128GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.49W/kg (head), 0.99W/kg (body)