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Samsung Galaxy S Duos S7562-DS vs Nokia C21

2G Network GSM 850 / 900 / 1800 / 1900 (HSDPA 900 / 2100) SIM1: GSM 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 2100  
4G Network LTE  
Dimensions 169.9 x 77.9 x 8.8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 120 g 195 g  
Display Type TFT capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch  
Display Size 480 x 800 pixels, 4 inches (~233 ppi pixel density 6.5 Inches   720 x 1600 Pixels (~269 PPI)  
Memory 4GB built-in, microSD card (supports up to 32GB) 32GB Built-in, 2GB RAM  
Card slot microSDXC (dedicated slot)  
RAM 768 RAM
GPRS Yes Yes
3G Yes
WLAN Yes Wi-Fi 802.11 b/g/n, hotspot  
BlueTooth Yes v4.2 with A2DP  
USB Yes microUSB 2.0  
NFC No  
GPS Yes + A-GPS support  
Main Camera 8 MP, LED Flash   HDR, touch focus, Video (720p@30fps)  
Front Camera 5 MP, LED Flash, Video 720p  
OS Android OS, v4.0 (Ice Cream Sandwich) Android 11.0 (Go edition)  
Chipset Unisoc SC9863A (28nm)  
Processor Qualcomm MSM7227A Snapdragon Octa-core (4 x 1.6 GHz Cortex-A55 + 4 x 1.2 GHz Cortex-A55)  
GPU IMG8322  
Sensors Accelerometer, Fingerprint (rear mounted), Proximity  
Browser Android HTML5  
Sound Stereo FM Radio with RDS, MP4/H.264/H.263 player, MP3/WAV/eAAC+ player, Youtube, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/WMA player, Speaker Phone  
Colors Black , white Dark Blue, Warm Gray  
Battery (Li-ion Removable), 3000 mAh  
Misc SMS(threaded view), MMS, Email, Push Mail, IM   Document viewer/editor, Photo/video editor