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Sony Xperia Z1 vs Realme C51 128GB

2G Network GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1700 / 1900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE 800 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 144 x 74 x 8.5 mm 167.2 x 76.7 x 8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 170 g 186 g  
Display Type 16M colors, TFT Capacitive touchscreen, Shatter proof and scratch-resistant glass, Triluminos display IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 560 nits (peak)  
Display Size 1080 x 1920 pixels, 5 inches 6.74 Inches   720 x 1600 Pixels (~260 PPI)  
Multitouch Yes
Protection Panda Glass  
Memory 16GB built-in 2GB RAM 128GB Built-in, 4GB RAM  
Card slot microSDXC (dedicated slot)  
GPRS Yes Yes
WLAN WLAN (Wi-Fi 802.11 a/b/g/n/ac Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v4.0 with A2DP v5.0 with A2DP, LE  
USB USB USB Type-C 2.0  
NFC Yes  
GPS Yes Yes + A-GPS support, & GLONASS, BDS, GALILEO  
Main Camera 20.7MP, autofocus, 1/2.3" sensor size, LED Flash, Geo-tagging, touch focus, face detection, image stabilization, HDR, panorama, Video (1080p@30fps), 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 (2MP) 5 MP, f/2.2, 28mm (wide), 1/5", HDR, Video (720p@30fps)  
OS Android OS, v4.3 (Jelly Bean) Android 13 OS  
Chipset Unisoc Tiger T612 (12 nm)  
Processor Quad-core 2.2 GHz Krait 400, Qualcomm MSM8974 Snapdragon 800 Chipset Octa-core (2 x 1.8 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Mali-G57  
Sensors Accelerometer, gyro, proximity, compass Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound Stereo FM radio with RDS, 3.5mm audio jack, TV-out (via MHL A/V link), DivX/Xvid/MP4/H.263/H.264/WMV player, MP3/eAAC+/WAV/WMA player, SNS integration, Games (built-in + downloadable) 3.5mm Audio Jack, Speaker Phone  
Colors Black, White, Purple Mint Green, Carbon Black  
Battery Stand-by Up to 880 h Music play Up to 110 h (Li-Po Non removable), 5000 mAh   - Fast charging 33W wired, 0-50% in 28 min (advertised)  
StandBy Time Stand-by Up to 880 h Music play Up to 110 h
Misc GPS + A-GPS, support, GLONASS, GPU, , Shatter proof and scratch-resistant glass, Active noise cancellation with dedicated mic, Organizer, Document viewer, Voice memo/dial, Predictive text input SMS(threaded view), MMS, Email, Push Mail, IM   NFC 360? (market/region dependent), Glass front, plastic frame, plastic back, Photo/video editor, Document viewer