ASUS ZenFone 3 (ZE520KL) vs. ASUS ZenFone 7 Pro

Phone Comparison, Reviews and Tests

In depth comparison and review of ASUS ZenFone 3 (ZE520KL) and ASUS ZenFone 7 Pro. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

ASUS ZenFone 3 (ZE520KL) vs. ASUS ZenFone 7 Pro Comparison Chart
DESIGN AND DIMENSIONS ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Product Type Smartphone Smartphone
Manufacturer Model Number ZE520KL ZS671KS
Form Factor Touch Touch
Height 146.87 mm 165.08 mm ASUS ZenFone 7 Pro has greater height than ASUS ZenFone 3 (ZE520KL).
Width 73.98 mm 77.28 mm ASUS ZenFone 7 Pro has greater width than ASUS ZenFone 3 (ZE520KL).
Depth 7.69 mm 9.6 mm ASUS ZenFone 3 (ZE520KL) is narrower than ASUS ZenFone 3 (ZE520KL).
Weight 144 g 230 g ASUS ZenFone 3 (ZE520KL) is lighter than ASUS ZenFone 3 (ZE520KL).
Body Colour Moon white | Gold shimmer | Black sapphire Aurora black
Body Material Metal, glass -
Waterproof (Water-resistant) - -
SAR Value 0.938 W/kg (body), 0.278 W/kg (head) -
Integrated Components FM radio -
Connector Type Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM (SIM1 and SIM2/MicroSD slots) Dual-SIM
SIM Card Configuration Details Nano SIM + nano SIM/microSD -
DISPLAY ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Display Type LCD display OLED display
Display Technology Super IPS+ AMOLED
Screen Size (Display Size) 5.2" 6.67" ASUS ZenFone 7 Pro has larger screen size than ASUS ZenFone 3 (ZE520KL).
Screen Resolution (Display Resolution) 1920 x 1080 pixels 2400 x 1080 pixels ASUS ZenFone 7 Pro has better screen resolution than ASUS ZenFone 3 (ZE520KL).
Display Format Full HD -
Aspect Ratio - 20:9
Max Brightness 600 cd/m² 700 cd/m² ASUS ZenFone 7 Pro has better display brightness than ASUS ZenFone 3 (ZE520KL).
HDR - Yes ASUS ZenFone 7 Pro has HDR.
HDR Technology - HDR10+
Display Enhancement Technology Bluelight Filter for Eye Care DC Dimming
Display Refresh Rate - 90 Hz
Display Features ASUS Glove Touch technology, 2.5D curved glass DCI-P3 Wide colour gamut, 1ms response time, Glove Touch, Delta-E < 1, NanoEdge display
Display Protection (Screen Protector) Fingerprint-resistant oleophobic coating, Corning Gorilla Glass (scratch resistant glass) Corning Gorilla Glass 6 (scratch resistant glass)
PROCESSOR ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Processor Type (CPU) Qualcomm Snapdragon 625 Qualcomm Snapdragon 865+
Processor Number - SM8250
Clock Speed 2 GHz 3.1 GHz ASUS ZenFone 7 Pro has higher clock speed than ASUS ZenFone 3 (ZE520KL).
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes Yes Both phones have 64-bit architecture.
Graphics System (GPU) Qualcomm ADRENO 506 Qualcomm ADRENO 650
MEMORY ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
RAM 3 GB LPDDR5 SDRAM - 8 GB ASUS ZenFone 7 Pro has more RAM than ASUS ZenFone 3 (ZE520KL).
Internal Memory Size (Storage Capacity) 32 GB 256 GB ASUS ZenFone 7 Pro has more internal memory than ASUS ZenFone 3 (ZE520KL).
Memory Interface - UFS 3.1
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 2 TB microSDHC, microSDXC - up to 2 TB
CAMERA ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
MAIN CAMERA
Number of Main Cameras 1 3
Rear Camera Design - Flip
Sensor Resolution 16 Megapixel 64 Megapixel ASUS ZenFone 7 Pro has better camera resolution than ASUS ZenFone 3 (ZE520KL).
Sensor Size - 1/1.73"
Sensor Name Sony Exmor RS IMX298 sensor Sony Exmor RS IMX686 sensor
Lens Type - Wide-angle lens
Lens Aperture F/2.0 F/1.8 ASUS ZenFone 7 Pro has better lens aperture than ASUS ZenFone 3 (ZE520KL).
Lens Construction 6-element 6-element
Field of View (FoV) - 78.3 degree(s)
Pixel Size - 0.8 μm
Optical Image Stabiliser (OIS) 4 Stop OIS (Optical Image Stabilisation) - ASUS ZenFone 3 (ZE520KL) has optical stabilisation.
Focus Adjustment Automatic Automatic
Laser Auto Focus Yes -
Minimum Focal Length (Focal Distance) - 26.6 mm
Special Effects Depth of field HDR
HDR Mode Auto HDR mode -
Camera Modes Panorama, Time-lapse mode, night mode, manual mode, Real time beauty mode, super resolution mode, All Smiles mode, Mini mode Slow motion video, Panorama, Time-lapse mode, Pro mode, Portrait, Night, Auto, 4K Timelapse, Pro Video, Auto Panorama
Light Source Dual LED flash Dual LED flash
Video Resolutions 3840 x 2160 (4K) 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 30fps, Motion Tracking 3840 x 2160 (4K) at 60 fps, Slo-mo video 3840 x 2160 (4K) at 120 fps
Camera Features (Functions) Sapphire crystal lens cover, GIF animation function, Smart Remove, Electronic Image Stabiliser (EIS), Time Rewind, Largan lens 3-axis electronic image stabilisation, RAW image capture, Wind Noise Filter, 4-axis optical image stabilisation, Instant cameras switching, 2x1 On-chip-lens phase detection autofocus, Quad Bayer technology - 16MP (1.6 µm effective pixel size), take still photos while playing 8K video, HyperSteady, Free Zoom, Mic Focus, Motion Tracking 2.0
SECOND CAMERA
Sensor Resolution (2nd Camera) - 12 Megapixel
Sensor Size (2nd Camera) - 1/2.55"
Sensor Name (2nd Camera) - Sony Exmor RS IMX363 sensor
Lens Type (2nd Camera) - Super wide-angle lens
Lens Aperture (2nd Camera) - F/2.2
Pixel Size (2nd Camera) - 1.4 μm
Minimum Focal Length (2nd Camera) - 14.3 mm
Camera Features (2nd Camera) - Real-time distortion correction, Dual Pixel image sensor, supports 4 cm macro
THIRD CAMERA
Sensor Resolution (3rd Camera) - 8 Megapixel
Lens Type (3rd Camera) - Telephoto lens
Minimum Focal Length (3rd Camera) - 80 mm
Optical Zoom - 3x
Camera Features (3rd Camera) - 12x total zoom, 4-axis, optical image stabilisation
FRONT CAMERA
Number of Front Cameras 1 0
Sensor Resolution (Front) 8 Megapixel -
Lens Aperture (Front) F/2.0 -
HDR Mode (Front) Auto HDR mode -
Camera Modes (Front) Selfie panorama -
Camera Features (Front) PixelMaster camera -
BATTERY AND CHARGING ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Battery Capacity (Battery Size) 2650 mAh 5000 mAh ASUS ZenFone 7 Pro has larger battery capacity than ASUS ZenFone 3 (ZE520KL).
Fast Charging Technology - Qualcomm Quick Charge 4.0, Power Delivery 3.0 ASUS ZenFone 7 Pro has fast charging technology.
Run Time Details - Continuous browsing (5G): up to 6.2 hrs
Playback (video): up to 24 hrs
Mixed usage: up to 48 hrs
Battery Technology - Lithium polymer
CELLULAR ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G ASUS ZenFone 7 Pro has more advanced generation mobile network.
Operating System Android 6.0 (Marshmallow) Android 10
User Interface ASUS ZenUI 3.0 ASUS ZenUI 7
Navigation GPS, A-GPS, GLONASS, BeiDou GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC
COMMUNICATIONS ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, DC-HSPA+ GPRS, EDGE, HSDPA, HSUPA, HSPA+, DC-HSDPA, FDD-LTE, TDD-LTE, 5G NR FR1
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band - Band 1, Band 2, Band 3, Band 4, Band 6, Band 8, Band 19
3G UMTS Frequency - 2100, 1900, 1800, 1700, 800, 900, 800
4G LTE Band Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 29, Band 38, Band 39, Band 40, Band 41
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 700d, TDD 2600, TDD 1900, TDD 2300, TDD 2500
5G NR Band - N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12
5G NR Frequency - FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12
Wireless Interface Infrared (IrDA), IEEE 802.11b/g/n/ac IEEE 802.11a/b/g/n/ac, IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 4.2 Bluetooth 5.1
Bluetooth Profiles - HFP, OPP, PAN, A2DP, AVRCP, HID
NFC - Yes ASUS ZenFone 7 Pro has NFC reader for mobile payments.
Messaging Services SMS, MMS SMS, MMS
MEDIA ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Sound Enhancements - Qualcomm aptX audio
Audio Amplifier - NXP 9874 smart amplifier
FEATURES ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, hall sensor, RGB sensor Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, hall sensor, angle sensor
Security Devices Fingerprint reader Face recognition, fingerprint reader (side)
Additional Phone Features Infrared remote control, Dual microphones, Hi-Res Audio, Google Drive Storage (100 GB) (free for 2 years), ASUS SonicMaster 3.0 technology, ASUS NoiseZero Talk technology MIMO technology, Smart Key, Triple internal microphones with ASUS Noise Reduction Technology
OTHERS ASUS ZenFone 3 (ZE520KL) ASUS ZenFone 7 Pro
Included Accessories Power adapter SIM card removal tool, USB-C to USB-C cable, transparent case, 30W fast charger, active case
Compliant Standards - SGS
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