In depth comparison and review of ASUS ZenFone 3 (ZE520KL) and OnePlus 9. 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.
| DESIGN AND DIMENSIONS | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZE520KL | - | |
| Form Factor | Touch | Touch | |
| Height | 146.87 mm | 160 mm | OnePlus 9 has greater height than ASUS ZenFone 3 (ZE520KL). |
| Width | 73.98 mm | 74.2 mm | OnePlus 9 has greater width than ASUS ZenFone 3 (ZE520KL). |
| Depth | 7.69 mm | 8.7 mm | ASUS ZenFone 3 (ZE520KL) is narrower than ASUS ZenFone 3 (ZE520KL). |
| Weight | 144 g | 192 g | ASUS ZenFone 3 (ZE520KL) is lighter than ASUS ZenFone 3 (ZE520KL). |
| Body Colour | Moon white | Gold shimmer | Black sapphire | Astral black | Arctic sky | |
| 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) | OnePlus 9 |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | Super IPS+ | Fluid Amoled | |
| Screen Size (Display Size) | 5.2" | 6.55" | OnePlus 9 has larger screen size than ASUS ZenFone 3 (ZE520KL). |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 2400 x 1080 pixels | OnePlus 9 has better screen resolution than ASUS ZenFone 3 (ZE520KL). |
| Display Format | Full HD | Full HD+ | |
| Pixel Density | - | 402 ppi | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | 600 cd/m² | 1100 cd/m² | OnePlus 9 has better display brightness than ASUS ZenFone 3 (ZE520KL). |
| Colour Depth | - | 16.7 million colours | |
| HDR | - | Yes | OnePlus 9 has HDR. |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | Bluelight Filter for Eye Care | Vibrant Color Effect | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | ASUS Glove Touch technology, 2.5D curved glass | Always-on display, Reading mode, night mode, Wide colour display (P3), sRGB support | |
| Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating, Corning Gorilla Glass (scratch resistant glass) | Corning Gorilla Glass (scratch resistant glass) |
| PROCESSOR | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 888 | |
|---|---|---|---|
| Clock Speed | 2 GHz | - | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | ASUS ZenFone 3 (ZE520KL) has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 506 | Qualcomm ADRENO 660 |
| MEMORY | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| RAM | 3 GB | LPDDR5 SDRAM - 8 GB | OnePlus 9 has more RAM than ASUS ZenFone 3 (ZE520KL). |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 128 GB | OnePlus 9 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 | - |
| CAMERA | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 3 | |
|---|---|---|---|
| Sensor Resolution | 16 Megapixel | 48 Megapixel | OnePlus 9 has better camera resolution than ASUS ZenFone 3 (ZE520KL). |
| Sensor Size | - | 1/1.43" | |
| Sensor Name | Sony Exmor RS IMX298 sensor | Sony Exmor RS IMX689 sensor | |
| Lens Aperture | F/2.0 | F/1.8 | OnePlus 9 has better lens aperture than ASUS ZenFone 3 (ZE520KL). |
| Lens Construction | 6-element | 7-element | |
| Pixel Size | - | 1.12 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 | Yes | |
| Minimum Focal Length (Focal Distance) | - | 23 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 | Panorama, Time-lapse mode, Pro mode, HYPERLAPSE, Nightscape capture mode, Portrait, Filter mode, Super Macro, Portrait video, UltraShot HDR, Smart Scene Recognition, Tilt-shift mode, Focus Peaking, Cat/Dog Face Focus, Super Stable, Video Nightscape | |
| 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, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1920 x 1080 (1080p) at 240 fps, Super slow motion video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 30fps | |
| Camera Features (Functions) | Sapphire crystal lens cover, GIF animation function, Smart Remove, Electronic Image Stabiliser (EIS), Time Rewind, Largan lens | Tracking Focus, Phase Detect Auto-Focus (PDAF), Continuous Auto Focus (CAF), RAW image capture, Dual Native ISO, 2x2 On-Chip Lens (OCL), Hasselblad Camera, Natural Color Calibration, 12-bit RAW |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 50 Megapixel | |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/1.56" | |
| Sensor Name (2nd Camera) | - | Sony Exmor RS IMX766 sensor | |
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Lens Element Qty (2nd Camera) | - | 7-element | |
| Field of View (2nd Camera) | - | 119 degree(s) | |
| Minimum Focal Length (2nd Camera) | - | 14 mm | |
| Camera Features (2nd Camera) | - | 2x2 On-Chip Lens (OCL), Freeform Lens |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Lens Element Qty (3rd Camera) | - | 3-element | |
| Camera Functions (3rd Camera) | - | Monochrome |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 16 Megapixel | OnePlus 9 has better front camera resolution than ASUS ZenFone 3 (ZE520KL). |
| Sensor Name (Front) | - | Sony Exmor RX IMX471 sensor | |
| Lens Aperture (Front) | F/2.0 | F/2.4 | ASUS ZenFone 3 (ZE520KL) has better front lens aperture than ASUS ZenFone 3 (ZE520KL). |
| Pixel Size (Front) | - | 1 μm | |
| Focus Adjustment | - | Focus free | |
| Special Effects (Front) | - | HDR, face retouch | |
| HDR Mode (Front) | Auto HDR mode | - | |
| Camera Modes (Front) | Selfie panorama | Time-lapse mode | |
| Light Source (Front) | - | Display flash | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Front) | PixelMaster camera | Electronic Image Stabiliser (EIS) |
| BATTERY AND CHARGING | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Battery Capacity (Battery Size) | 2650 mAh | 4500 mAh | OnePlus 9 has larger battery capacity than ASUS ZenFone 3 (ZE520KL). |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge, Warp Charge 65T technology | OnePlus 9 has fast charging technology. |
| Recharge Time (Charging Time) | - | 29 min | |
| Wireless Charging | - | Yes | OnePlus 9 can be charged wirelessly. |
| Wireless Charging Standards | - | Qi |
| CELLULAR | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | OnePlus 9 has more advanced generation mobile network. |
| Operating System | Android 6.0 (Marshmallow) | OxygenOS (based on Android 11) | |
| User Interface | ASUS ZenUI 3.0 | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, DC-HSPA+ | 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 4, Band 5, Band 8, Band 9, Band 19 | |
| 3G UMTS Frequency | - | 2100, 1900, 1700, 850, 900, 1700, 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 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 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 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | - | N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n78, n40 | |
| 5G NR Frequency | - | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3500, TDD 2300 | |
| Wireless Interface | Infrared (IrDA), IEEE 802.11b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.2 | |
| NFC | - | Yes | OnePlus 9 has NFC reader for mobile payments. |
| Modem | - | Snapdragon X55 5G | |
| Messaging Services | SMS, MMS | - |
| MEDIA | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Supported Digital Audio Standards | - | WAV, WMA, AAC, MP3, FLAC, AC-3, AAC +, OGG, APE (Monkey's Audio), M4A, LDAC, IMY, EAC3, MID, AMR-WB, AMR-NB, EAC3-JOC, AC-4 | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | |
| Sound Enhancements | - | Qualcomm aptX audio, Qualcomm aptX HD audio, Dolby Atmos Surround Sound |
| FEATURES | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| 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, flicker sensor, sensor core | |
| Security Devices | Fingerprint reader | Fingerprint reader (under display), face recognition | |
| 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 | Noise Cancellation Technology, MIMO technology, Gesture Controls, OnePlus Switch, Alert Slider, dual stereo speakers, Zen mode 2.0, OnePlus Games |
| OTHERS | ASUS ZenFone 3 (ZE520KL) | OnePlus 9 |
|---|
| Included Accessories | Power adapter | SIM card removal tool, sticker, screen protector, USB-C to USB-C cable, protective case, Warp Charge 65 power adapter | |
|---|---|---|---|
| Compliant Standards | - | SGS |
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