vivo X9 vs vivo Y31
vivo X9
vivo Y31
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Network
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2G networkGSM 900, 1800GSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1900, 2100; CDMA2000 1x & TD-SCDMAHSDPA 850, 900, 2100
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4G networkLTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)-
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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-A speedLTE-A, (2CA) Cat6, 300 Mbps download, 50 Mbps upload-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2016-112015-9
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Status2016-112015-10
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Design
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SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM
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Height152.6 mm137.2 mm
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Width74 mm68.8 mm
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Thickness7 mm8.4 mm
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Weight154 g137 g
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ColorsGold, Rose GoldBlack, White
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Display
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Display typeSuper AMOLED capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size5.5 inches4.7 inches
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Resolution1080 x 1920 pixels720 x 1280 pixels
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Pixel density401 ppi312 ppi
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Display colors1677721616777216
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MultitouchYes-
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Hardware
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CPUOcta-core 2.0 GHz ARM Cortex-A53Quad-core 1.3 GHz
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ChipsetQualcomm MSM8953 Snapdragon 625Mediatek MT6580
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GPUAdreno 506-
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Memory RAM4 GB1 GB
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Internal storage64, 128 GB8 GB
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Memory cardmicroSD
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Memory card max-128 GB
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OS
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OSAndroid OS, v6.0.1 (Marshmallow)Android OS, v5.1 (Lollipop)
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Main camera
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Main camera16 MP, f/2.08 MP
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Primary camera resolution-3264 x 2448 pixels
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Primary camera video1080p@30fpsvideo
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Primary camera Autofocusphase detection autofocus-
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Primary camera flashLED flashLED flash
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Camera featuresGeo-tagging, HDR, face detection, panorama, touch focusGeo-tagging, HDR, touch focus
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Selfie camera
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Selfie camera typeDual-
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Selfie camera20 MP, f/2.0 , 1/2.8"2 MP
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8 MP
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Selfie camera video1080p-
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration; MP3, WAV ringtonesVibration; MP3, WAV ringtones
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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, 802.11acWi-Fi
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WLAN WiFi HotspotYes-
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WLAN WiFi DirectYes-
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WLAN WiFi Dual BandYes-
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USBmicroUSB 2.0microUSB 2.0
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USB hostYes-
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Bluetoothv4.2Yes
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Bluetooth A2DPYes-
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bluetooth LEYes-
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GPSYes, with A-GPSYes, with A-GPS
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IM-IM
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Messaging Push EmailPush Email-
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Messaging Push Mail-Push Mail
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JavaNoNo
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SensorsFingerprint (front-mounted), accelerometer, compass, proximityAccelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity3050 mAh2100 mAh
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Battery removableNon-removable-
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Fast battery chargingYes-
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Talk time--
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Standby time--