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Nokia Lumia 638 vs Samsung Galaxy A04 4GB

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 / 1900 / 2100  
4G Network LTE 1800 / 1900 / 2100 / 2300 / 2500 / 2600 LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500)  
Dimensions 129.5 x 66.7 x 9.2 mm 164.4 x 76.3 x 9.1 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 136 g 192 g  
Display Type IPS LCD capacitive touchscreen, 16M colors, ClearBlack display PLS LCD Capacitive Touchscreen, 16M Colors, Multitouch  
Display Size 480 x 854 pixels, 4.5 inches (~218 ppi pixel density) 6.5 Inches   720 x 1600 Pixels (~270 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 8GB built-in 64GB Built-in, 4GB RAM  
Card slot microSD card (supports up to 128GB) microSD Card, (supports up to 1TB)  
RAM 1GB RAM
GPRS Yes Yes
EDGE Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot  
BlueTooth Bluetooth v4.0 with A2DP v5.0 with A2DP, LE  
USB USB (microUSB v2.0) microUSB 2.0  
NFC No  
GPS Yes Yes + A-GPS support & Glonass, BDS, GALILEO  
Main Camera 5 MP, 2592 X 1936 pixels, autofocus, 1/4'' sensor size, geo-tagging, panorama, Video Dual Camera: 50 MP, f/1.8, (wide), AF + 2 MP, f/2.4, (depth), LED Flash   Geo-tagging, touch focus, face detection, panorama, HDR, Video (1080p@30fps)  
Front Camera 5 MP, f/2.2  
OS Microsoft Windows Phone 8.1 Android 12 OS  
Chipset GPU: Adreno 30 MediaTek Helio P35 (14nm) SoC  
Processor 1.2 GHz Quad-core Cortex-A7, Qualcomm Snapdragon 400 Octa-core (4 x 2.3 GHz + 4 x 1.8 GHz)  
GPU GPU: Adreno 305 PowerVR GE8320  
Sensors Accelerometer Accelerometer, Fingerprint (side mounted), 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  
Colors Black Black, Green, White, Copper  
Battery 1830 mAh (Li-Po Non removable), 5000 mAh   - Battery charging 7.8W  
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 back, plastic frame, Photo/video editor, Document viewer