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Microsoft Lumia 540 vs Oppo A18 128GB

2G Network SIM1:GSM 850 / 900 / 1800 / 1900 SIM2:GSM 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), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 144 x 73.7 x 9.4 mm 163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 152 g 188 g  
Display Type IPS LCD capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 5.0 inches, 720 x 1280 pixels (~294 ppi pixel density) 6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass  
Memory 8GB built-in 128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSD card(supports uo to 128 GB) microSDXC  
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 v5.3 with A2DP, LE, aptX  
USB USB (microUSB v2.0) USB Type-C 2.0, OTG  
NFC No  
GPS Yes Yes + A-GPS support & Glonass, BDS, GALILEO  
Main Camera 8 MP, 3264 x 2448 pixels, autofocus, LED flash, 1/4'' sensor size, geo-tagging, Video (480p@30fps), Dual Camera: 8 MP, f/2.0, (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, 480p 5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Microsoft Windows Phone 8.1 with Lumia Denim Android 13 OS  
Chipset Qualcomm Snapd Mediatek MT6769 Helio G85 (12nm)  
Processor 1.2 GHz Quad-Core Cortex-A7 Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU GPU: Adreno 302 Arm Mali-G52  
Sensors Accelerometer, proximity Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound Stereo FM radio with RDS, 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, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Orange, white, black, gray, blue Glowing Black, Glowing Blue  
Battery Music-Play Up to 81 hrs 2200 mAh (Li-Po Non removable), 5000 mAh  
StandBy Time Stand-by up to 576 hrs
Misc GPS + A-GPS support, GPU, Dual SIM + Micro-SIM, dual stand-by), Active noise cancellation with dedicated mic, Document viewer/editor, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer