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Oppo Mirror 3 vs Tecno Spark 40

2G Network SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  Best smartphone
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 4(1700/2100), 7(2600) LTE  
Dimensions 137.7 x 68.8 x 8.9 mm 165.6 x 77 x 7.7 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 130 g N/A  
Display Type IPS LCD capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen   120Hz  
Display Size 6.67 Inches   1080 x 2460 Pixels (~403 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 128/256GB Built-in, 4/6/8GB RAM  
Card slot microSDXC  
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  
BlueTooth Bluetooth v4.0 v5.4 with A2DP, LE  
USB USB(microUSB v2.0, USB Host) USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 8 MP, 3264 x 2448 pixels, autofocus, LED flash, 1/3.2'' sensor size, 1.4?m pixel size, geo-tagging, touch focus, face detection, HDR, panorama, Video 1080p@30fps, 5 MP 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 OS, v4.4 (KitKat) Android 15 OS  
Chipset Qualcomm MSM89 Mediatek Helio G81 (12 nm)  
Processor 1.2 GHz Quad-Core Cortex-A53 Octa-core (2 x 2.0 GHz Cortex-A75 + 6x 1.8 GHz Cortex-A55)  
GPU GPU: Adreno 306 Mali-G52 MC2  
Sensors Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound FM Radio, 3.5mm audio jack, MP4/WMV/H.264 player, MP3/WAV/WMA/eAAC+/FLAC player, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, 24-bit/192kHz Hi-Res audio, Speaker Phone  
Colors White, Blue Ink Black, Titanium Grey, Veil White, Mirage Blue  
Battery 2000 mAh 5200 mAh   - Fast battery 45W wired, 55 min to 100%  
Misc GPS + A-GPS support, Dual SIM + Nano-SIM/ Micro-SIM, dual stand-by), Fast battery charging: 100% in 90 min, Photo/video editor, Document viewer, 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