NIU GO 20 vs Yezz Billy 4
NIU GO 20
Yezz Billy 4
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G network-HSDPA 850, 1900
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HSDPA speed-42.2 Mbps
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HSUPA speed-5.76 Mbps
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GPRSYesYes
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EDGEYes
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Availability
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Oficially announced2013-112014-6
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Status2013-112014-10
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Design
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SIMDual SIM (Mini-SIM)Dual SIM (Micro-SIM)
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Height101 mm122.5 mm
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Width43.8 mm64.4 mm
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Thickness14 mm9.9 mm
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Weight60 g109 g
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ColorsBlack, Blue, Purple, Red, Silver, WhiteBlack, Blue, Champing Gold, Gun Metal, Red, White, Yellow
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Display
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Display typeTFTTFT capacitive touchscreen
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Physical size1.8 inches4.0 inches
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Resolution128 x 160 pixels480 x 800 pixels
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Pixel density114 ppi233 ppi
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Display colors6656016777216
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Hardware
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CPUQuad-core 1.2 GHz ARM Cortex-A7
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Chipset-Qualcomm MSM8212 Snapdragon 200
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GPU-Adreno 302
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Internal storage64 Mbit4 GB
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Memory RAM-512 MB
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Memory cardmicroSDmicroSD
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Memory card max32 GB128 GB
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Main camera
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Main camera8 MP
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Primary camera resolution640 x 480 pixels3264 x 2448 pixels
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Primary camera videono720p@30fps
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Primary camera Autofocus-autofocus
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Primary camera flash-LED flash
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Camera features-Geo-tagging, touch focus
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Selfie camera
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Secondary cameraNo-
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Selfie camera1.3 MP
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Sound
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3.5mm jackNoYes
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LoudspeakerYesYes
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NotificationsRingtonesVibration; MP3, WAV ringtones
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Multimedia
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Radio FMStereo FM radioStereo FM radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n
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WLAN WiFi Hotspot-Yes
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USBYesmicroUSB 2.0
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Bluetoothv2.1v4.0
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Bluetooth A2DP-Yes
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GPSNoYes, with A-GPS
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GLONASS-Yes
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Features
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Messaging SMSSMSSMS(threaded view)
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Messaging MMSMMSMMS
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Messaging Email-Email
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Messaging IMIMIM
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Messaging Push Email-Push Email
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WAPYes-
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JavaNoNo
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Sensors-Accelerometer, proximity
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity500 mAh1300 mAh
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Talk time6 h-
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Talk time 2G-7 h
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Talk time 3G-4 h 30 min
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Standby time200 h-
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Standby time 2G-350 h
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Standby time 3G-300 h
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OS
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OS-Microsoft Windows Phone 8.1
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Browser
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HTML-HTML5