Asus Zenfone 7 ZS670KS vs vivo X21
Asus Zenfone 7 ZS670KS
vivo X21
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
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3G networkHSDPA 800, 850, 900, 1700(AWS), 1900, 2100HSDPA 850, 900, 1900, 2100
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4G networkLTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29, 38, 39, 40, 41LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
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5G network5G band 1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 77, 78; SA/NSA-
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HSDPA speed42.2 Mbps-
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HSUPA speed5.76 Mbps-
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HSPA speed-HSPA
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LTE speedLTE-A (5CA) Cat 19, 1800 Mbps download, 150 Mbps uploadLTE
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5G speed3.6 Gbps download-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2020-082018-3
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Status2020-092018
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Design
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BuildGlass front (Gorilla Glass 6), glass back (Gorilla Glass 3), aluminum frameFront glass, aluminum body
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SIMDual SIM (Nano-SIM, dual stand-by)Hybrid Dual SIM (Nano-SIM, dual stand-by)
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Height165.1 mm154.5 mm
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Width77.3 mm74.8 mm
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Thickness9.6 mm7.4 mm
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Weight230 g156.2 g
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ColorsBlack, WhiteAurora White, Black, Ruby Red
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Display
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Display typeSuper AMOLED capacitive touchscreenSuper AMOLED capacitive touchscreen
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Physical size6.67 inches6.28 inches
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Resolution1080 x 2400 pixels1080 x 2280 pixels
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Pixel density395 ppi402 ppi
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Display colors1677721616777216
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Protection2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 6-
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Multitouch-Yes
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Display featuresHDR10+, 90Hz refresh rate, 700 nits typ. brightness-
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Hardware
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CPUOcta-coreOcta-core
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CPUSingle-core 2.84 GHz Kryo 585Quad-core 2.2 GHz Kryo 260
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CPU(second)Triple-core 2.42 GHz Kryo 585quad-core 1.8 GHz Kryo 260
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CPU(third)Quad-core 1.8 GHz Kryo 585
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ChipsetQualcomm SM8250 Snapdragon 865Qualcomm SDM660 Snapdragon 660
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GPUAdreno 650Adreno 512
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Memory RAM6, 8 GB6 GB
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Internal storage128 GB64, 128 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD(uses second SIM slot)
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Memory card max2 TB256 GB
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StorageUFS 3.1-
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OS
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OSZenUI 7 (Android 10)Android 8.1 (Oreo)
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Main camera
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Camera typeTripleDual
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Main camera64 MP, f/1.8 , 26 mm, 1/1.72" , 0.8 µm12 MP, f/1.8 , 1/2.5" , 1.4 µm
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8 MP, f/2.4 , 80 mm, 3x optical zoom5 MP, f/2.4
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12 MP, f/2.2 , 17 mm, 1/2.55" , 1.4 µm
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Primary camera resolution9280 x 6920 pixels4032 x 3024 pixels
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Primary camera video8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS, HDR1080p@30fps
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Primary camera Autofocus-dual pixel phase detection autofocus
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Primary camera flashdual LED flashLED flash
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Camera featuresAutofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, laser autofocus, RAWGeo-tagging, HDR, face detection, panorama, touch focus
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Sound
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3.5mm jackNoYes
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LoudspeakerYes, with stereo speakersYes
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Notifications-Vibration; MP3, WAV ringtones
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EarpieceYesYes
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Multimedia
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RadioNo-
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Radio FM-FM radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11axWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
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WLAN WiFi HotspotYesYes
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WLAN WiFi DirectYesYes
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WLAN WiFi Dual BandYesYes
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USBType-C 1.0 reversible connectormicroUSB 2.0
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USB On-The-GoYesYes
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Bluetoothv5.0v5.0
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Bluetooth A2DPYesYes
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bluetooth LEYesYes
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Bluetooth AptXaptX Adaptive-
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NFCYes-
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYesYes
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GALILEOYes-
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BeidouYes-
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QZSSYes-
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NavICYes-
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Features
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Messaging SMS-SMS(threaded view)
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Messaging MMS-MMS
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Messaging Email-Email
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Messaging Push Email-Push Email
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SensorsAccelerometer, compass, fingerprint, gyroscope, proximity, lightFingerprint (rear-mounted), accelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity5000 mAh3200 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingQualcomm Quick Charge 4, Power Delivery 3.0Yes
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Reverse chargingYes-
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Cost
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Price800 USD-
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Selfie camera
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Selfie camera12 MP, f/2.0
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Selfie camera resolution-4032 x 3024 pixels
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Selfie camera video-1080p@30fps