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Oppo U3 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 HSDPA 900 / 2100  
4G Network LTE band 38(2600), 39(1900), 40(2300), 41(2500) LTE  
Dimensions 156.8 x 81 x 8 mm 165.6 x 77 x 7.7 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 195 g N/A  
Display Type IPS LCD capacitive touchscreen, Color OS 2.0 IPS LCD Capacitive Touchscreen   120Hz  
Display Size 1080 x 1920 pixels, 5.9 inches (~377 ppi pixel density) 6.67 Inches   1080 x 2460 Pixels (~403 PPI)  
Multitouch Yes
Memory 128/256GB Built-in, 4/6/8GB RAM  
Card slot microSDXC  
RAM 2 GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 a/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 On-the-go) USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 13 MP, 4128 x 3096 pixels, autofocus, LED flash, Geo-tagging, touch focus, face detection, HDR, panorama, Video 1080p@30fps, 5 MP, 1080p, LED flash 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, v4.4.4 (KitKat) Android 15 OS  
Chipset Mediatek MT6752 Mediatek Helio G81 (12 nm)  
Processor 1.7 GHz Octa-core Octa-core (2 x 2.0 GHz Cortex-A75 + 6x 1.8 GHz Cortex-A55)  
GPU GPU: Mali-T760MP2 Mali-G52 MC2  
Sensors Accelerometer, proximity, compass Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound 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, Black Ink Black, Titanium Grey, Veil White, Mirage Blue  
Battery Talk-time up to 10 hrs 3100 mAh 5200 mAh   - Fast battery 45W wired, 55 min to 100%  
StandBy Time Stand-by up to 400 hrs
TalkTime Talk-time up to 10 hrs 3100 mAh
Misc GPS + A-GPS support, Dual SIM + Nano-SIM/ Micro-SIM, dual stand-by), Active noise cancellation with dedicated mic, Fast battery charging: 75% in 30 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