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QMobile Noir Z7 vs Vivo Y21d 8GB

2G Network GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 8(900), 28(700), 38(2600), 40(2300), 41(2500)  
Dimensions 139.8 x 67.4 x 5.1 mm 166.14 x 77.01 x 8.39 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 97 g 209 g  
Display Type AMOLED capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen   90Hz, 1000 nits Brightness  
Display Size 4.8 inches (~67.4% screen to body ratio), 720 x 1280 pixels (~306 ppi pixel density) 6.68 Inches   720 x 1608 Pixels (~264 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 16GB built-in 128GB Built-in, 8GB RAM, eMMC 5.1  
Card slot microSD Card, (supports up to 2TB)  
RAM 1GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot  
BlueTooth Bluetooth 4.0 with A2DP v5.2 with A2DP, LE  
USB USB USB Type-C 2.0, OTG  
NFC No  
GPS Yes Yes + A-GPS support & Glonass, BDS, GALILEO, QZSS  
Main Camera 8 MP, 3264 x 2448 pixels, autofocus, LED flash, Geo-tagging, touch focus, face smile detection, panorama, HDR, Video 1080p@30fps, Dual Camera: 50 MP, f/1.8 + 0.08 MP, f/2.2, LED Flash   Night, Portrait, Video, Live Photo, Slo-mo, Time-lapse, Panorama, Video  
Front Camera 5 MP 5 MP  
OS Android OS, v4.4.2 (KitKat) Android 15 OS  
Chipset Mediatek MT6 Unisoc T7225 (12 nm)  
Processor 1.7GHz Octa core Cortex-A7 Octa-Core (2 × 1.8 GHz + 6 × 1.8 GHz)  
GPU GPU: Mali-450 Arm Mali G57  
Sensors Accelerometer, gyro, proximity, compass Accelerometer, Compass, Fingerprint (side mounted), Gyro, Proximity  
Browser HTML5 HTML5  
Sound FM Radio, 3.5mm audio jack, MP4/H.263/H.264/WMV player, MP3/eAAC+/WMA/WAV player, YouTube, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, Speaker Phone  
Colors Black, White, Gold Coral Red, Jade Green  
Battery ?Stand-by Up to 4-5 days 2050 mAh Li-ion 6500 mAh   - Fast charging 44W  
StandBy Time ?Stand-by Up to 4-5 days 2050 mAh
Misc GPS + A-GPS support, Document viewer, Photo viewer/editor, MIcro-Sim, Active noise cancellation with dedicated mic, Google Search, Maps, Gmail, Voice memo/dial/commands, Calendar, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   Document viewer, Photo/video editor