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Haier Volt P4500 vs Oppo A57

2G Network SIM1: GSM 900 / 1800 SIM2: GSM 900 / 1800 SIM1: SIM1 GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSPDA HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions N/a 163.7 x 75 x 8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight N/a 187 g  
Display Type HD IPS Display IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   60Hz  
Display Size 5.0 Inches, 1280 x 720 Pixels 6.53 Inches   720 x 1612 Pixels (~270 PPI)  
Multitouch Yes
Memory 16GB built-in 2GB RAM 64GB Built-in, 3GB RAM  
Card slot MIcroSD card (support up to 32GB) microSDXC  
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, hotspot  
BlueTooth Bluetooth v5.0 with A2DP, LE  
USB USB USB-C port  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 8 MP, Autofocus, Dual-LED Flash, Video, Dual 13 MP, f/2.2, 26mm (wide), 1/3.06", AF + 2 MP, f/2.4, (depth), LED Flash   Geo-tagging, touch focus, face detection, HDR, panorama, Video (1080p@30fps)  
Front Camera 5 MP 8 MP, f/2.0, (wide), HDR, Video (1080p@30fps)  
OS Android OS V5.1 (Lollipop) Android 11 OS  
Chipset MediaTek MT6765G Helio G35 (12 nm)  
Processor 1.3 GHz Quad-Core Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)  
GPU PowerVR GE8320  
Sensors Proximity, Light, G-sensor Accelerometer, Compass, FingerPrint, Proximity  
Browser HTML5 HTML5  
Sound FM Radio, 3.5mm audio jack, MP4/WMV/H.264/H.263 player, MP3/AAC/WMA/WAV player, SNS integration, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone  
Colors Various Glowing Green, Glowing Black  
Battery 4500 mAh (Li-Po Non removable), 5000 mAh   - Fast charging 33W, 50% in 30 min (advertised)  
Misc GPS + A-GPS support, Google Search, Maps, Gmail, Youtube, office, Calendar, Google Play Store, Speakerphone SMS (threaded view), MMS, Email, Push Email   IPX4 water resistant, IP5X dust resistant ,Glass front, Plastic frame, Plastic back, Document viewer, Photo/video editor