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Lenovo A3690 vs Tecno Spark 50

2G Network SIM1: GSM 900 / 1800 / 1900 SIM2: GSM 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE 1800 / 2100 / 2600 LTE  
Dimensions 141.2 x 71.2 x 8.8 mm 167.8 x 79.2 x 8.2 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 140 g 210 g  
Display Type IPS LCD capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen   120Hz  
Display Size 5.0 inches, 720 x 1280 pixels (~294 ppi pixel density) 6.78 Inches   720 x 1600 Pixels (~259 PPI)  
Multitouch Yes
Memory 8GB built-in 128GB Built-in, 6GB RAM (+12GB Extended RAM)  
Card slot microSD card(supports uo to 32 GB) microSDXC (dedicated slot)  
RAM 1GB 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 with A2DP v5.3 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 8 MP, 3264 x 2448 pixels, autofocus, LED flash, Video, 50 MP, f/1.9, (wide), PDAF, LED Flash   Panorama, Video (1440p@30fps, 1080p@30fps)  
Front Camera 2 MP 8 MP, f/2.0, (wide)  
OS Android OS, v5.1 (Lollipop) Android 16 OS  
Chipset Mediatek MT6735P MediaTek Helio G81  
Processor 1.0 GHz Quad-Core Cortex-A53 Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU GPU: Mali-T720MP2 Mali-G57 MC2  
Sensors Accelerometer, proximity Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound FM radio, 3.5mm Jack, MP3/WAV/WMA/eAAC+ player, MP4/H.264 player, SNS integration, Google talk 3.5mm Audio Jack, Speaker  Phone  
Colors Black, White Halo Blue, Titanium Grey, Ink Black, Aurora Purple  
Battery 2300 mAh 7000 mAh   - 18W wired  
Misc GPS + A-GPS support, Photo video/editor, Document viewer, Dual SIM + Micro-SIM, dual stand-by), Google Search, Maps, Gmail, YouTube, Calendar, Google Talk SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, plastic frame, plastic back, IP64 dust tight and water resistant (water splashes), Drop resistant up to 1.5m