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Samsung Galaxy Core 2 vs Realme C51 128GB

2G Network SIM1 850 / 900 / 1800 / 1900 SIM2 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 130.3 x 68 x 9.8 mm 167.2 x 76.7 x 8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 138 g 186 g  
Display Type TFT capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 560 nits (peak)  
Display Size 4.5 inches 480 x 800 pixels (~207 ppi pixel density) 6.74 Inches   720 x 1600 Pixels (~260 PPI)  
Multitouch Yes
Protection Panda Glass  
Memory 4GB built-in 128GB Built-in, 4GB RAM  
Card slot microSD card (supports up to 64GB) microSDXC (dedicated slot)  
RAM 768MB RAM
GPRS Yes 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 with A2DP v5.0 with A2DP, LE  
USB USB V2.0 USB Type-C 2.0  
NFC Yes  
GPS Yes Yes + A-GPS support, & GLONASS, BDS, GALILEO  
Main Camera 5MP, 2592 x 1944 pixels, autofocus, LED flash, geo-tagging, touch focus, face and smile detection, Video (480p@30fps), 2ndary VGA Dual Camera: 50 MP, f/1.8, 27mm (wide), 1/2.76", PDAF + 0.08 MP, f/3.0, (depth), LED Flash   HDR, panorama, Video (1080p@30fps)  
Front Camera 5 MP, f/2.2, 28mm (wide), 1/5", HDR, Video (720p@30fps)  
OS Android OS, v4.4.2 (KitKat) Android 13 OS  
Chipset Unisoc Tiger T612 (12 nm)  
Processor 1.2 GHz Quad-Core Octa-core (2 x 1.8 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Mali-G57  
Sensors Accelerometer Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML 5 HTML5  
Sound FM radio, 3.5mm audio jack, MP4/H.264/H.263 player, MP3/WAV/eAAC+ player, SNS integration, YouTube, Google Talk, Image/video editor, Games (built-in + downloadable) 3.5mm Audio Jack, Speaker Phone  
Colors White, Black Mint Green, Carbon Black  
Battery 2000mAh (Li-Po Non removable), 5000 mAh   - Fast charging 33W wired, 0-50% in 28 min (advertised)  
Misc GPS + A-GPS support & GLONASS, Document viewer, Google Search, Maps, Gmail, Predictive text input,Google Talk, Picasa, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   NFC 360? (market/region dependent), Glass front, plastic frame, plastic back, Photo/video editor, Document viewer