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Apple iphone 6 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 / 900 / 1700 / 1900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE 700 / 850 / 900 / 1800 / 1900 / 2100 / 2600 LTE band 1(2100), 3(1800), 5(850), 8(900), 28(700), 38(2600), 40(2300), 41(2500)  
Dimensions 138.1 x 67 x 6.9 mm 166.14 x 77.01 x 8.39 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 129 g 209 g  
Display Type LED-backlit IPS LCD, capacitive touchscreen, 16M colors, Fingerprint sensor (Touch ID) IPS LCD Capacitive Touchscreen   90Hz, 1000 nits Brightness  
Display Size 750 x 1334 pixels, 4.7 inches (~326 ppi pixel density)Shatter proof glass, oleophobic coating 6.68 Inches   720 x 1608 Pixels (~264 PPI)  
Multitouch Yes
Memory 16GB built-in 128GB Built-in, 8GB RAM, eMMC 5.1  
Card slot microSD Card, (supports up to 2TB)  
RAM 1 GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 a/b/g/n/ac Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot  
BlueTooth Bluetooth v4.0 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 8MP, 3264x2448 pixels, autofocus, dual-LED (dual tone) flash, 1.5?m pixel size, geo-tagging, simultaneous HD video and image recording, touch focus, face and smile detection, image stabilization, panorama, HDR, Video (1080p@60fps, 720p@240fps), 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 1.2 MP, 720p, burst, HDR 5 MP  
OS iOS 8 Android 15 OS  
Chipset 1.4 GHZ Dual-core Cyclone (ARM v8-based) Chipset Apple A8, GPU PowerVR GX6650 (hexa-core graphics Unisoc T7225 (12 nm)  
Processor Octa-Core (2 × 1.8 GHz + 6 × 1.8 GHz)  
GPU GPU PowerVR GX6650 (hexa-core graphics) Arm Mali G57  
Sensors Accelerometer, gyro, proximity, compass, barometer Accelerometer, Compass, Fingerprint (side mounted), Gyro, Proximity  
Browser HTML (Safari) HTML5  
Sound Audio/video player and editor, 3.5mm audio jack, TV-out, Twitter and Facebook integration, iCloud cloud service, iCloud Keychain, Image editor, Games (built-in + downloadable) 3.5mm Audio Jack, Speaker Phone  
Colors Space Gray, White/Silver, Gold Coral Red, Jade Green  
Battery Music Play up to 50 hrs 1810 mAh Li-ion 6500 mAh   - Fast charging 44W  
StandBy Time Stand-by up to 250 hrs
Misc GPS + A-GPS support and GLONASS, MicroSIM card support only, Active noise cancellation with dedicated mic, iBooks PDF reader Siri natural language commands and dictation, Google Maps, AirDrop file sharing, Scratch-resistant glass back panel, Voice memo/command/dial, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   Document viewer, Photo/video editor