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Xiaomi Redmi 3 vs Tecno Spark 40

2G Network SIM1: GSM 900 / 1800 / 1900 SIM2: GSM 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  Best smartphone
3G Network HSDPA 850 / 1900 / 2100 HSDPA 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) LTE  
Dimensions 139.3 x 69.6 x 8.5 mm 165.6 x 77 x 7.7 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 144 g N/A  
Display Type IPS LCD capacitive touchscreen, 16M colors, MIUI 7.0 IPS LCD Capacitive Touchscreen   120Hz  
Display Size 5.0 inches, 720 x 1280 pixels (~294 ppi pixel density) 6.67 Inches   1080 x 2460 Pixels (~403 PPI)  
Multitouch Yes
Memory 16GB built-in 128/256GB Built-in, 4/6/8GB RAM  
Card slot microSDXC  
RAM 2GB 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 v4.1 with A2DP v5.4 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 13 MP, f/2.0, phase detection autofocus, LED flash, Geo-tagging, touch focus, face/smile detection, HDR, panorama, Video (1080p@30fps), 5 MP, f/2.2, 1080p@30fps 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, v5.1 (Lollipop) Android 15 OS  
Chipset 1.5 GHz Cortex Mediatek Helio G81 (12 nm)  
Processor 1.5 GHz Quad-Core Cortex-A53, 1.5 GHz Quad-Core Cortex-A53 Octa-core (2 x 2.0 GHz Cortex-A75 + 6x 1.8 GHz Cortex-A55)  
GPU GPU: Adreno 405 Mali-G52 MC2  
Sensors 720 x 1280 pixels (~294 ppi pixel density) Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound FM radio, 3.5mm audio jack, DivX/Xvid/MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, YouTube, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, 24-bit/192kHz Hi-Res audio, Speaker Phone  
Colors Gold, Dark Gray, Silver, Classic Gold Ink Black, Titanium Grey, Veil White, Mirage Blue  
Battery 4100 mAh 5200 mAh   - Fast battery 45W wired, 55 min to 100%  
Misc GPS + A-GPS support & GLONASS, BDS, Dual SIM + Micro-SIM/Nano-SIM, dual stand-by), Fast battery charging, Active noise cancellation with dedicated mic, Photo/video editor, Document viewer, Google Search, Maps, Gmail, Document viewer, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP64 dust tight and water resistant (water splashes), Drop resistant up to 1.5m