ASUS ZenFone 3 (ZE520KL) vs. Xiaomi Redmi Note 9

Phone Comparison, Reviews and Tests

In depth comparison and review of ASUS ZenFone 3 (ZE520KL) and Xiaomi Redmi Note 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.

Phone Specifications Comparison

ASUS ZenFone 3 (ZE520KL) vs. Xiaomi Redmi Note 9 Comparison Chart
DESIGN AND DIMENSIONS ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Product Type Smartphone Smartphone
Manufacturer Model Number ZE520KL -
Form Factor Touch Touch
Height 146.87 mm 162.3 mm Xiaomi Redmi Note 9 has greater height than ASUS ZenFone 3 (ZE520KL).
Width 73.98 mm 77.2 mm Xiaomi Redmi Note 9 has greater width than ASUS ZenFone 3 (ZE520KL).
Depth 7.69 mm 8.9 mm ASUS ZenFone 3 (ZE520KL) is narrower than ASUS ZenFone 3 (ZE520KL).
Weight 144 g 199 g ASUS ZenFone 3 (ZE520KL) is lighter than ASUS ZenFone 3 (ZE520KL).
Body Colour Moon white | Gold shimmer | Black sapphire Forest green
Body Material Metal, glass -
Protection - Splashproof
Waterproof (Water-resistant) - -
SAR Value 0.938 W/kg (body), 0.278 W/kg (head) 2.262 W/kg (limb), 1.138 W/kg (body), 0.795 W/kg (head)
Integrated Components FM radio Ultra-linear speaker
Connector Type Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
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 Nano SIM + nano SIM/microSD
DISPLAY ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Display Type LCD display -
Display Technology Super IPS+ -
Screen Size (Display Size) 5.2" 6.53" Xiaomi Redmi Note 9 has larger screen size than ASUS ZenFone 3 (ZE520KL).
Screen Resolution (Display Resolution) 1920 x 1080 pixels 2340 x 1080 pixels Xiaomi Redmi Note 9 has better screen resolution than ASUS ZenFone 3 (ZE520KL).
Display Format Full HD Full HD+
Aspect Ratio - 19.5:9
Max Brightness 600 cd/m² 450 cd/m² ASUS ZenFone 3 (ZE520KL) has better display brightness than Xiaomi Redmi Note 9.
Contrast Ratio - 1500:1
Display Enhancement Technology Bluelight Filter for Eye Care -
Display Features ASUS Glove Touch technology, 2.5D curved glass Reading mode 2.0, Dot Display, Full Screen gestures
Display Protection (Screen Protector) Fingerprint-resistant oleophobic coating, Corning Gorilla Glass (scratch resistant glass) Corning Gorilla Glass 5 (scratch resistant glass)
PROCESSOR ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Processor Type (CPU) Qualcomm Snapdragon 625 MediaTek Helio G85
Clock Speed 2 GHz 2 GHz Both phones have the same clock speed.
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 ARM G52 MC2
MEMORY ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
RAM 3 GB 3 GB Both phones have the same RAM size.
Internal Memory Size (Storage Capacity) 32 GB 64 GB Xiaomi Redmi Note 9 has more internal memory than ASUS ZenFone 3 (ZE520KL).
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 2 TB microSD
CAMERA ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
MAIN CAMERA
Number of Main Cameras 1 4
Sensor Resolution 16 Megapixel 48 Megapixel Xiaomi Redmi Note 9 has better camera resolution than ASUS ZenFone 3 (ZE520KL).
Sensor Size - 1/2"
Sensor Name Sony Exmor RS IMX298 sensor -
Lens Aperture F/2.0 F/1.79 Xiaomi Redmi Note 9 has better lens aperture than ASUS ZenFone 3 (ZE520KL).
Lens Construction 6-element 6-element
Field of View (FoV) - 79.4 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 -
Special Effects Depth of field HDR, Kaleidoscope
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 Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits
Face Recognition (Face ID) - Face recognition Xiaomi Redmi Note 9 has face detection.
Light Source Dual LED flash Flash
Video Resolutions 3840 x 2160 (4K) 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps
Camera Features (Functions) Sapphire crystal lens cover, GIF animation function, Smart Remove, Electronic Image Stabiliser (EIS), Time Rewind, Largan lens 4-in-1 Super Pixel, AI scene detection, Portrait mode with background blurring, Ultra wide-angle edge distortion correction, Steady handheld night photography, full screen frame, AI watermark
SECOND CAMERA
Sensor Resolution (2nd Camera) - 8 Megapixel
Sensor Size (2nd Camera) - 1/4"
Lens Type (2nd Camera) - Ultra wide-angle lens
Lens Aperture (2nd Camera) - F/2.2
Lens Element Qty (2nd Camera) - 5-element
Field of View (2nd Camera) - 118 degree(s)
Pixel Size (2nd Camera) - 1.2 μm
Camera Features (2nd Camera) - 5-piece lens
THIRD CAMERA
Sensor Resolution (3rd Camera) - 2 Megapixel
Lens Aperture (3rd Camera) - F/2.4
Pixel Size (3rd Camera) - 1.75 μm
Camera Functions (3rd Camera) - Macro camera
Camera Features (3rd Camera) - AF (2cm-10cm)
FOURTH CAMERA
Sensor Resolution (4th Camera) - 2 Megapixel
Sensor Size (4th Camera) - 1/5"
Lens Aperture (4th Camera) - F/2.4
Lens Element Qty (4th Camera) - 3-element
Pixel Size (4th Camera) - 1.75 μm
Camera Functions (4th Camera) - Depth camera
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 8 Megapixel 13 Megapixel Xiaomi Redmi Note 9 has better front camera resolution than ASUS ZenFone 3 (ZE520KL).
Sensor Size (Front) - 1/3.06"
Lens Aperture (Front) F/2.0 F/2.25 ASUS ZenFone 3 (ZE520KL) has better front lens aperture than ASUS ZenFone 3 (ZE520KL).
Lens Element Qty (Front) - 5-element
Field of View (Front) - 74 degree(s)
Pixel Size (Front) - 1.12 μm
Special Effects (Front) - HDR
HDR Mode (Front) Auto HDR mode -
Camera Modes (Front) Selfie panorama Panoramic selfies, AI portrait mode, AI Beautify
Face Recognition (Face ID) - Face recognition Xiaomi Redmi Note 9 has face detection.
Light Source (Front) - Display flash
Camera Features (Front) PixelMaster camera Palm shutter, AI silhouette detection
BATTERY AND CHARGING ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Battery Capacity (Battery Size) 2650 mAh 5020 mAh Xiaomi Redmi Note 9 has larger battery capacity than ASUS ZenFone 3 (ZE520KL).
Talk Time - 1980 minutes
Run Time Details - Talk: up to 1980 min
Gaming: up to 16 hrs
Playback (Music): up to 147 hrs
Navigation: up to 16 hrs
Battery Technology - Lithium polymer
CELLULAR ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Android 6.0 (Marshmallow) -
User Interface ASUS ZenUI 3.0 -
Navigation GPS, A-GPS, GLONASS, BeiDou GPS, A-GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, DC-HSPA+ VoLTE, FDD-LTE, TDD-LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1900 GSM, 2100 GSM
3G UMTS Band - Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency - 2100, 1900, 1700, 850, 900
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 20, Band 28, Band 38, 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 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500
Wireless Interface Infrared (IrDA), IEEE 802.11b/g/n/ac IEEE 802.11a/b/g/n/ac
Bluetooth Bluetooth 4.2 Bluetooth 5.0
Messaging Services SMS, MMS -
MEDIA ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Supported Digital Audio Standards - WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio)
Supported Digital Video Standards - MKV, XviD, M4V, MP4
Audio Amplifier - Smart PA
FEATURES ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 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, infrared (IR) sensor
Security Devices Fingerprint reader Face recognition, fingerprint reader
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 Infrared remote control, HyperEngine technology
OTHERS ASUS ZenFone 3 (ZE520KL) Xiaomi Redmi Note 9
Included Accessories Power adapter Protective cover, power adapter, SIM card removal tool, USB-C cable
Compliant Standards - TUV Rheinland Low Blue Light Certification
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