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Nokia Lumia 638 vs Vivo Y03t 128GB

2G Network GSM 850 / 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 / 1900 / 2100 / 2300 / 2500 / 2600 LTE band 1(2100), 3(1800), 5(850), 8(900), 28(700), 38(2600), 40(2300), 41(2500)  
Dimensions 129.5 x 66.7 x 9.2 mm 163.6 x 75.6 x 8.4 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 136 g 185 g  
Display Type IPS LCD capacitive touchscreen, 16M colors, ClearBlack display IPS LCD Capacitive Touchscreen   90Hz, 528 nits (HBM)  
Display Size 480 x 854 pixels, 4.5 inches (~218 ppi pixel density) 6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 8GB built-in 128GB Built-in, 4GB RAM, eMMC 5.1  
Card slot microSD card (supports up to 128GB) microSDXC (dedicated slot)  
RAM 1GB 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 v4.0 with A2DP v5.2 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C 2.0, OTG  
NFC No  
GPS Yes Yes + GPS, GLONASS, GALILEO, BDS, QZSS  
Main Camera 5 MP, 2592 X 1936 pixels, autofocus, 1/4'' sensor size, geo-tagging, panorama, Video Dual Camera: 13 MP, f/2.2, (wide), PDAF + 0.08 MP, f/3.0 (auxiliary lens), LED Flash   Geo-tagging, Phase detection, Panorama, Video (1080p@30fps)  
Front Camera 5 MP, f/2.2, (wide)  
OS Microsoft Windows Phone 8.1 Android 14 OS  
Chipset GPU: Adreno 30 Unisoc T612 (12 nm)  
Processor 1.2 GHz Quad-core Cortex-A7, Qualcomm Snapdragon 400 Octa-core (2 x 1.8 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU GPU: Adreno 305 Mali-G57 MP1  
Sensors Accelerometer Accelerometer, Proximity  
Browser HTML5 HTML5  
Sound FM radio, 3.5mm audio jack, MP4/H.264/H.263/WMV player, MP3/WAV/eAAC+/WMA player, Video/photo editor, Games (built-in) 3.5mm Audio Jack, Speaker  Phone   Telephone prices
Colors Black Space Black, Gem Green  
Battery 1830 mAh (Li-ion Non removable), 5000 mAh   - Battery charging 15W  
Misc GPS + A-GPS support and GLONASS, MicroSIM card support only, Active noise cancellation with dedicated mic, Document viewer/editor, Predictive text input, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, plastic frame, plastic back, IP54, dust and splash resistant, Document viewer, Photo/video editor