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Oppo Joy vs Tecno Spark 40

2G Network SIM1: 850/900/1800/1900 SIM2: 850/900/1800/1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  Best smartphone
3G Network 2100 MHz HSDPA 900 / 2100  
4G Network LTE  
Dimensions 124 x 63 x 9.9mm 165.6 x 77 x 7.7 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 125 g N/A  
Display Type FWVGA IPS Display IPS LCD Capacitive Touchscreen   120Hz  
Display Size 6.67 Inches   1080 x 2460 Pixels (~403 PPI)  
Memory 4GB built-in 128/256GB Built-in, 4/6/8GB RAM  
Card slot microSDXC  
RAM 512 MB RAM
GPRS Yes
WLAN WLAN (WIFI Hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v2.1 v5.4 with A2DP, LE  
USB USB USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 3MP, autofocus, LED flash, Geo-tagging, Burst shoot, face detection, Video, 2ndary (0.3MP) Single Camera: 50 MP, (wide), PDAF Auxiliary lens, Dual LED Flash   Panorama, Video (1440p@30fps, 1080p@30fps)  
Front Camera 8 MP, (wide), Dual LED Flash, Video (1080p@30fps)  
OS Android 4.2 Android 15 OS  
Chipset Mediatek Helio G81 (12 nm)  
Processor 1.3 GHZ Dual-Core Octa-core (2 x 2.0 GHz Cortex-A75 + 6x 1.8 GHz Cortex-A55)  
GPU Mali-G52 MC2  
Sensors Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound 3.5mm audio jack, MP4/WMV/H.264/H.263 player, MP3/AAC/WMA/WAV player, SNS integration, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, 24-bit/192kHz Hi-Res audio, Speaker Phone  
Colors Black Ink Black, Titanium Grey, Veil White, Mirage Blue  
Battery 1700mAh 5200 mAh   - Fast battery 45W wired, 55 min to 100%  
Misc GPS + A-GPS support, Dual SIM, Face Unlock, Google Search, Maps, Gmail, Youtube, Calendar, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP64 dust tight and water resistant (water splashes), Drop resistant up to 1.5m